Dibakar Roy Chowdhury HOD and Professor Department of Physics

Prof. Dibakar Roy Chowdhury is a PhD from Technical University of Darmstadt, Germany (2008). Later he worked as a postdoctoral in University of Duisburg-Essen, Germany (2008 - 2009) and Los Alamos National Laboratory, USA (2009 - 2013). Dr. Roy Chowdhury was working as scientist (level-B) with Australian National University, Canberra, Australia since 2013 which he left to join as an Associate Professor with Mahindra École Centrale, Hyderabad, India in January 2015. His research interest deals with electromagnetics, materials, photonics and micro-nanotechnology, with special focus on studying light-matter interaction at the micro- nano- scale level. Precisely his research interests are in the areas of metamaterials, plasmonics, semiconductor physics, nanophotonics, micro- nano- fabrication and solar cells. He has been working on design, simulations and fabrication of novel devices while simultaneously exploring their applications in information, sensing and energy related fields. So far he has published 40 papers in internationally reputed peer reviewed journals including Science, Applied Physics Letters, Scientific Reports, Optics Express, Physical Review B, Optics Letters etc. His current h index is 18 with total citations more than 2100. His works has been highlighted by several scientific magazines such as Worldwide Science, Phys Org, Nanotechnolgy News, Nanotechnology Now, Laser Focus World, Terahertz Technology etc. His works were also highlighted in the cover page of Applied Physics Letters.

  • Education
    • PhD (Electrical Engineering): Technical University of Darmstadt, Darmstadt, Germany (2008)
    • M. Tech (Physics): Indian Institute of Technology Madras, Chennai, India (2003)
    • MSc (Physics): Rani Durgavati VishwaVidyalaya (RDVV), Jabalpur, India (2000)
  • Research
    • Metamaterials, Plasmonics
    • Light matter interaction
    • Terahertz and Ultrafast phenomena
    • Ultrafast and non-linear electronic devices
    • Micro- and nano- structure fabrication
    • Light trapping and Solar cells
  • Awards
    • CSIR (Council for Scientific and Industrial Research) - NET (National Eligibility Test) examination for junior research fellowship and for eligibility of lecturership in India (2000)
    • Graduate Aptitude Test in Engineering (GATE) [jointly organized by “Indian Institute of Technology” and “Indian Institute of Science”]: All India rank – 19 (2001)
    • Institute Gold medal (2003): Class topper in the branch of solid state technology in M Tech from Indian Institute of Technology, Madras, India
    • DAAD Fellowship (2002 - 2003): For pursuing the Master’s thesis from the selective technical universities of Germany
    • Early Career Research Award (2016): Department of Science and Technology (DST), Government of India
  • Publications
    1. Ultrfast Relaxation of Charge Carriers induced switching in Terahertz Metamaterials, S Jagan Mohan Rao, Gagan Kumar, Abul Azad, and Dibakar Roy Chowdhury, Journal of Infrared Millimetre and Terahertz Waves, (accepted) (2018)
    2. Dual-band electromagnetically induced transparency effect in a concentrically coupled asymmetric terahertz metamaterial, K Monika Devi, Dibakar Roy Chowdhury, Gagan Kumar, and Amarendra Sarma, Journal of Applied Physics, 124, 063106 (2018)
    3. Plasmon Induced Transparency in graphene-based terahertz metamaterials, Koijam Monika Devi, Maidul Islam, Dibakar Roy Chowdhury, Amarendra Kumar Sarma, and Gagan Kumar, European Physics Letters, 120, 27005 (2018)
    4. Terahertz Plasmonic Waveguide based Thin Film Sensors, Maidul Islam, Dibakar Roy Chowdhury, Amir Ahmed, and Gagan Kumar, IEEE Journal of Lightwave Technology, 35, 5215 (2017)
    5. Role of resonance modes on Terahertz Metamatrials based Thin Film Sensors, Maidul Islam, Jagan Mohan Rao, Gagan Kumar, Bishnu Pal, and Dibakar Roy Chowdhury, Scientific Reports, 7, 7355 (2017)
    6. Probing the near field inductive coupling in broadside coupled terahertz metamaterials, Jagan Mohan Rao, Deepak Kumar, Gagan Kumar, and Dibakar Roy Chowdhury, IEEE Journal of Selected Topics in Quantum Electronics, 23(4), 1 (2017)
    7. Plasmon-Induced Transparency effects through alternatively coupled Resonators in Terahertz Metamaterials, Koijam Monika Devi, Amarendra Kumar Sarma, Dibakar Roy Chowdhury, and Gagan Kumar, Optics Express, 25, 10484 (2017)
    8. Modulating the near field coupling through resonator displacement in planar terahertz metamaterials, Jagan Mohan Rao, Deepak Kumar, Gagan Kumar, and Dibakar Roy Chowdhury, Journal of Infrared millimeter and Terahertz Waves, 38, 124 (2017)
    9. Terahertz Guided Mode Properties in an internally corrugated Plasmonic Waveguide, Maidul Islam, Dibakar Roy Chowdhury, Amir Ahmed, and Gagan Kumar, Journal of Applied Physics, 122, 053105 (2017)
    10. Displacement current mediated resonances in Terahertz Metamaterials, Chao Liu, Kriti Agarwal, Yuping Zhang, Dibakar Roy Chowdhury, Abul K. Azad, and Jeong Hyun Cho, Advanced Optical Materials, 4, 1312 (2016) 10.1002/adom.201600196
    11. Nonradiative and Radiative Resonance Energy Transfer in a Meta-molecule, L. Cong, N. Xu, Dibakar Roy Chowdhury, M. Manjappa, C. Rockstuhl, W. Zhang, and R. Singh, Advanced Optical Materials, 4, 252 (2016)
    12. Resonance tuning due to Coulomb interaction in strong near field coupled metamaterials, Dibakar Roy Chowdhury, Ningning Xu, Weili Zhang, and Ranjan Singh, Journal of Applied Physics, 118, 023104 (2015)
    13. Flexible Metasurfaces and Metamaterials: A Review of Materials and Fabrication processes at Micro- and Nano-Scales, Sumeet Walia, Charan Manish Shah, Philipp Gutruf, Hussein Nili, Dibakar Roy Chowdhury, Withawat Withayachumnankul, Madhu Bhaskaran and Sharath Sriram, Applied Physics Review, 2, 011303 (2015)
    14. Hybrid metasurface for ultra-broadband terahertz modulation, Janet Hayes, Withawat Withayachumnankul, Nathaniel Grady, Dibakar Roy Chowdhury, Abul K. Azad, and Hou-Tong Chen, Applied Physics Letters, 105 (18), 181108 (2014)
    15. Probing the transition from an uncoupled to a strong near field coupled regime between bright and dark mode resonators in metasurfaces, Ranjan Singh, Ibraheem A. I. Al-Naib, Dibakar Roy Chowdhury, Longqing Cong, Carsten Rockstuhl, and Weili Zhang, Applied Physics Letters, 105 (8), 081108 (2014)
    16. Dark plasmonic mode excitation through symmetry breaking in terahertz metamaterials, Dibakar Roy Chowdhury, Xiaogang Fang, Yong Zeng, Xiaoshuang Chen, Antoinette J Taylor, and Abul K. Azad, Optics Express, 22, 19401 (2014)
    17. Ultrafast resonance switching in terahertz metamaterials using ion implanted silicon on sapphire, Dibakar Roy Chowdhury, Ranjan Singh, Antoinette J. Taylor, and Abul K. Azad, ArXiv: 1407.2715 (2014)
    18. Orthogonally twisted planar concentric split ring resonators towards strong near-field coupled terahertz metamaterials, Dibakar Roy Chowdhury, John F. O’Hara, Antoinette J. Taylor, and Abul K. Azad, Applied Physics Letters, 104 (10), 101105 (2014)
    19. Charge Carrier Relaxation Processes in TbAs nanoinclusions in GaAs Measured By Optical-Pump THz-Probe Transient Absorption Spectroscopy, Laura Vanderhauf, Abul Azad, Cory C. Bomberger, Dibakar Roy Chowdhury, Antoinette J Taylor, Joshua Zide and Matthew Doty, Physical Review B, 89, 045418 (2014)
    20. Active and Passive coupling schemes in THz metamaterial based devices, Dibakar Roy Chowdhury, Abul K. Azad, Weili Zhang, and Ranjan Singh, IEEE Transactions on Terahertz Science and Technology, 3, 783 (2013)
    21. Influence of film thickness in THz active metamaterial devices: A comparison between super conductor and metallic split ring resonators, Ranjan Singh, Dibakar Roy Chowdhury, Abul K. Azad, Quanxi Jia, Antoinette J. Taylor, and Hou-Tong Chen, Applied Physics Letters, 103, 061117 (2013)
    22. Terahertz Metamaterials for Linear Polarization Conversion and Anomalous Refraction, Nathaniel Grady, Janet Hayes, Dibakar Roy Chowdhury, Yong Zeng, Matthew T. Reiten, Abul K. Azad, Antoinette J. Taylor, Diego Dalvit and Hou-Tong Chen, Science, 340, 1304 (2013) News Highlights in Terahertz Technology on May 20, 2013
    23. Ultrafast manipulation of near field coupling between dark and bright modes in terahertz metamaterials, Dibakar Roy Chowdhury, Ranjan Singh, Antoinette J. Taylor, Hou-Tong Chen and Abul K. Azad, Applied Physics Letters, 102, 011122 (2013)
    24. Impact of resonator geometry and its coupling with ground plane on ultrathin metamaterial perfect absorber, Li Huang*, Dibakar Roy Chowdhury*, Suchitra Ramani, Matthew T. Reiten, Shengnian Luo, Abul K. Azad, Antoinette J. Taylor and Hou-Tong Chen, Applied Physics Letters, 101, 101102 (2012) (* equal contribution first authors); arXiv:1207.0540v1
    25. Terahertz chiral metamaterials with giant and dynamically tunable optical activity, Jiangfeng Zhou, Dibakar Roy Chowdhury, Rongkau Zhao, Abul Azad, Hou-Tong Chen, Costas M. Soukoulis, Antoinette J. Taylor and John O'Hara, Physical Review B, 86, 035448 (2012)
    26. Coupling schemes in planar terahertz metamaterials, Dibakar Roy Chowdhury, Ranjan Singh, Antoinette J. Taylor, Hou-Tong Chen, Weili Zhang and Abul K. Azad, International Journal of Optics, 2012, 148985 (2012) (Review article)
    27. Experimental demonstration of terahertz metamaterial absorbers with a broad and flat high absorption band, Li Huang, Dibakar Roy Chowdhury, Suchitra Ramani, Matthew T. Reiten, Shengnian Luo, Antoinette J. Taylor and Hou Tong Chen, Optics Letters, 37, 154 (2012), arXiv:1109.3917v1
    28. Dynamically reconfigurable THz metamaterial through photo-doped semiconductor, Dibakar Roy Chowdhury, Ranjan Singh, John F. O'Hara, Hou-Tong Chen, Antoinette J. Taylor and Abul K. Azad, Applied Physics Letters, 99, 231101 (2011) (Top 20 most downloaded article in December 2011)
      News Highlights in Terahertz Technology on December 6, 2011
    29. Metamaterial induced transparency in a broken symmetry single Fano resonator array, Ranjan Singh, Ibraheem A. I. Al-Naib, Yuping Yang, Dibakar Roy Chowdhury, Wei Cao, Tsuneyuki Ozaki, Roberto Morandotti, and Weili Zhang, Applied Physics Letters, 99, 201107 (2011)
    30. A broadband terahertz metamaterial with nested structure, Dibakar Roy Chowdhury, Ranjan Singh, Matthew Reiten, Hou-Tong Chen, Antoinette J. Taylor, John F. O’Hara and Abul K. Azad, Optics Express, 19(17) 15817 (2011)
    31. Tailored resonator coupling for modifying the terahertz metamaterial response, Dibakar Roy Chowdhury, Ranjan Singh, Matthew Reitten, Jiangfeng Zhou, Antonoitte J. Taylor and John F. O’Hara, Optics Express, 19 (11), 10679 (2011)
    32. Resonance tuning in closely spaced inhomogeneous bilayer metamaterials, M. T. Reiten, D Roy Chowdhury, J. Zhou, A. J. Taylor, J. F. O’Hara and A. K. Azad, Applied Physics Letters, 98, 131105 (2011)
    33. Field Effects on SnOx and SnO2 nanoparticles synthesized in the gas phase, Dibakar Roy Chowdhury, Ivaturi Aruna, Alexander Nedic, Frank E Kruis and Roland Schmechel, Physica E, 42 (9), 2471-2476 (2010)
    34. Experimental demonstration of resonant-tunneling-diode operation beyond quasibound-state-lifetime limit, Michael Feiginov and Dibakar Roy Chowdhury, Journal of Physics: Conference Series 193, 012016 (2009)
    35. Operation of resonant tunneling diode beyond resonant-state lifetime limit, Michael Feiginov and Dibakar Roy Chowdhury, Applied Physics Letters, 91, 203501 (2007) (as journal cover page)
    36. The planar approach to a Al0.12Ga0.88N/GaN based double barrier HBV, Bogdan Nicolae, Dibakar Roy Chowdhury, Gabor Pop, H. L. Hartnagel, Daniel Pasquet, Frequenz, 61, 247-248 (2007)
    37. S parameter measurements of superlattice heterostructure barrier junctions towards THz varactors, Bogdan Nicolae, Dibakar Roy Chowdhury and Hans L. Hartnagel, Frequenz, 61, 245-246 (2007)
    38. Simulation and Measurement of a New Type of Non-linear Component for Harmonic Extraction, Bogdan Nicolae, Dibakar Roy Chowdhury and Hans L. Hartnagel, Frequenz, 60, 206-209 (2006)
    Peer-reviewed publications in conference proceedings:
    1. A novel way to reduce conduction current in Al0.7Ga0.3As/GaAs Heterostructure Barrier Varactors, Dibakar Roy Chowdhury, Mustafa Saqlam, Kabula Mutamba, Hans L. Hartnagel, IWPSD, Delhi, India, 817 – 821 (2005)
    2. Resonant tunneling diode: intrinsic response time vs. quasi-bound-state lifetime, Dibakar Roy Chowdhury and Michael Feiginov, WOCSDICE, Venice, Italy 195-198 (2007)
    3. Experimental and modeled configuration of double-barrier HBV based on Al0.7Ga0.3As/GaAs, B. Nicolae, D. Roy Chowdhury and H. L. Hartnagel, IWPSD, Mumbai, India, 351-354 (2007)
    4. Resonant tunneling diodes beyond quasi-bound-state lifetime limit, Michael Feiginov and Dibakar Roy Chowdhury, Proc. SPIE, 6892, 68920D (2008) (invited)
    5. Experimental studies of double-barrier Al0.12Ga0.88N/GaN heterostructure varactors in view of frequency increases, Bogdan Nicolae, Dibakar Roy Chowdhury and Hans L. Hartnagel, German Microwave Conference (GeMic), Hamburg, Germany, 1-3 (2008)
    6. Multilayer Terahertz Metamaterials: Interactions Between Layers Within the Deep-Subwavelength Limit, Matthew T. Reiten, Abul K. Azad, Dibakar Roy Chowdhury, Antoinette J. Taylor and John F. O'Hara, IRMMW-THz, Rome, Italy, (2010)
    7. Active tuning of coupled resonance modes in terahertz metamaterials, Dibakar Roy Chowdhury, Abul K. Azad, Matthew Reiten, Antoinette J. Taylor and John F. O’Hara, CLEO, Baltimore, USA, CWK4 (2011)
    8. Passive resonance tuning through closely spaced coupled split ring resonators, Matthew T. Reiten, Dibakar Roy Chowdhury, Jiangfeng Zhou, John F. O’Hara, Antoinette J. Taylor and Abul Azad, CLEO, Baltimore, USA, QThA2 (2011)
    9. Active Terahertz Metamaterial devices, H.-T. Chen, A. K. Azad, J. F. O’Hara, R. Singh, J. Zhou, M. T. Reiten, Dibakar Roy Chowdhury, Q. Jia, S. A. Trugman, and A. J. Taylor, IRMMW 2011, Houston, USA (2011)
    10. Thermal and optical tuning in ultrathin superconducting Terahertz Metamaterials, Ranjan Singh, Jie Xiong, Dibakar Roy Chowdhury, Hao Yang, Abul K. Azad, Stuart A. Trugman, Quanxi Jia, Antoinette J. Taylor, and Hou-Tong Chen, Proc. SPIE, 8423, 84230Y (2012) (invited)
    11. Metamaterial absorbers and anti-reflection coatings: Experiments and theory, J. Zhou, J. F. O’Hara, L. Huang, Dibakar Roy Chowdhury, M. T. Reiten, A. K. Azad, T. Koschny, C. M. Soukoulis, A. J. Taylor and H.-T. Chen, META 2012 (2012)
    12. Photo-doped silicon in split ring resonator gap towards dynamically reconfigurable terahertz metamaterials, Dibakar Roy Chowdhury, Ranjan Singh, John F. O’Hara, Hou-Tong Chen, Antoinette J. Taylor and Abul K. Azad, CLEO, San Jose, USA, QTu1G.4 (2012)
    13. Broadening of fundamental resonance via nested resonators in terahertz metamaterials, Dibakar Roy Chowdhury, Ranjan Singh, Matthew Reiten, Hou-Tong Chen, Antoinette J. Taylor, John F. O’Hara and Abul K. Azad, CLEO, San Jose, USA QTu3F.1 (2012)
    14. Electromagnetically induced transparency in an individual Fano resonator metamaterial, R. Singh, I. A. Al-Naib, Y. Yang, Dibakar Roy Chowdhury, W. Cao, C. Rockstuhl, T Ozaki, R. Morandotti, and W. Zhang, CLEO, San Jose, USA QTu3F.5 (2012)
    15. Characterization of TbAs nanopartciles embedded in GaAs using pump-probe measurements of carrier relaxation dynamics, Laura Vanderhauf, Abul Azad, Dibakar Roy Chowdhury, Cory C. Bomberger, Joshua Zide and Matthew Doty, APS March Meeting, Baltimore, Marryland, B20003 (2013)
    16. Ultrafast Control of near field coupling in terahertz metamaterials, Dibakar Roy Chowdhury, Ranjan Singh, Hou-Tong Chen, Antoinette J. Taylor, and Abul K. Azad, CLEO, San Jose, USA, QTh1A.4 (2013)
    17. Broadband and high-efficiency terahertz metamaterial linear polarization converters, Nathaniel Grady, Janet Hayes, Dibakar Roy Chowdhury, Yong Zeng, Matthew T. Reiten, Abul K. Azad, Antoinette J. Taylor, Diego Dalvit and Hou-Tong Chen, IRMMW-2013, Mainz, Germany (2013)
    18. Enhanced electro-optic modulation in a single split-ring resonator, Dmitry Shchegolkov, Matthew Reiten, Dibakar Chowdhury, Antoinette Taylor, and Abul K. Azad, CLEO, San Jose, USA QTh1A.6 (2013)
    19. Ultra-Broadband Terahertz Modulation by Active Hybrid Metamaterials, Janet Hayes, Abul K. Azad, Dibakar Roy Chowdhury, Nathaniel Grady, and Hou-Tong Chen, IRMMW-2014, Tucson, Arizona, USA, R2 C-32.1 (2014)
    20. Tuning of terahertz metamaterials’ resonances via near field coupling, Abul K. Azad, Dibakar Roy Chowdhury, Hou-Tong Chen, and Antoinette J. Taylor, Proceedings SPIE, 9483, (2015)
    21. Magnetic Metamaterials: A comparative study of resonator geometry and metal conductivity, Shashank Rangu, Kamireddy Sreekar, Raviniteish Reddy, Murtaza Bohra and Dibakar Roy Chowdhury, Conference on Computational Physics (CCP), IIT Guwahati (2015), Journal of Physics: Conference Series, 759, 012044 (2016)
    22. Terahertz Guided mode propagation in a planar plasmonic waveguide and slow light properties, Maidul Islam, Dibakar Roy Chowdhury and Gagan Kumar, OSA International Conference on Photonics and Fibre Optics, P1A.21 (2016)
    23. Near Field Inductive Coupling in Terahertz Metamaterials, S Jagan Mohan Rao, Gagan Kumar and Dibakar Roy Chowdhury, JSAP-OSA Joint Symposium, Tokyo, Japan, 7p_A409_10 (2017)
    24. Single Split ring Resonator based terahertz metamaterials for refractive index sensing, S Jagan Mohan Rao, Maidul Islam, Gagan Kumar, Bishnu Pal, and Dibakar Roy Chowdhury, SPIE Photonics West, 10531, 105311K (2018)
    25. Electromagnetic response of dielectric nanostructures in liquid crystals, S Amaraganti, D Roy Chowdhury, M Ravnik, and J Dontabhaktuni, 10555, 105551F (2018)
    26. Controlling extraordinary transmission through hole arrays using subwavelength periodic structures, N Lok Abhishikht, Sabyasachi Banerjee, Shashank Rangu, Sreekar Kamireddy, Abul K Azad, and Dibakar Roy Chowdhury, JTu2A.39 (2018)
    Conference Presentations:
    1. A novel way to reduce conduction current in Al0.7Ga0.3As/GaAs Heterostructure Barrier Varactors, Dibakar Roy Chowdhury, Mustafa Saqlam, Kabula Mutamba, Hans L. Hartnagel, International Workshop on the Physics of Semiconductor Devices (IWPSD), National Physical Laboratory (NPL), Delhi, India (2005)
    2. Resonant tunneling diode: intrinsic response time vs. quasi-bound-state lifetime, Dibakar Roy Chowdhury and Michael Feiginov, Workshop on Compound Semiconductor devices and Integrated Circuits held in Europe (WOCSDICE), University of Padova, Venice, Italy (2007)
    3. Experimental and modeled configuration of double-barrier HBV based on Al0.7Ga0.3As/GaAs, B. Nicolae, D. Roy Chowdhury and H. L. Hartnagel, International Workshop on the Physics of Semiconductor Devices (IWPSD), Mumbai, India (2007)
    4. Experimental studies of double-barrier Al0.12Ga0.88N/GaN heterostructure varactors in view of frequency increases, Bogdan Nicolae, Dibakar Roy Chowdhury and Hans L. Hartnagel, German Microwave Conference (GeMic), Hamburg, Germany (2008)
    5. Experimental demonstration of Resonant-Tunneling-Diode operation beyond resonant-state-lifetime limit, Michael Feiginov and Dibakar Roy Chowdhury, ICPS, Rio De Janeiro, Brazil (2008)
    6. Response time and negative conductance of resonant-tunneling-diode beyond resonant state lifetime limit, Michael Feiginov and Dibakar Roy Chowdhury, 17th International Symposium in Nanostructures: Physics and Technology, Minsk, Belarus, (2009)
    7. Demonstration of field effect behavior by stoichiometric SnO2 nanoparticles synthesized from gas phase, Dibakar Roy Chowdhury, Ivaturi Aruna, Alexander Nedic, Claudia Busch, Frank E Kruis and Roland Schmechel, EMRS, Strassburg, France, (2009)
    8. Experimental demonstration of resonant-tunneling-diode operation beyond quasibound-state-lifetime limit, Michael Feiginov and Dibakar Roy Chowdhury, 16th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures (EDISON), Montpelliar, France, (2009)
    9. Stable aqueous dispersion of ZnO nanocrystals for printing Thin Film Transistors, A. Khaleel, D Roy Chowdhury, M. Ali, C. Busch, R. Schmechel, and M. Winterer, NSTI NanoTech, Texas, USA (2009)
    10. Ink-Jet printed ZnO nanoparticles films for different applications, A. Khaleel, D Roy Chowdhury, M. Ali, R. Schmechel, and M. Winterer, European Congress on Advanced Materials (EuroMat09), Glasgow, UK (2009)
    11. Non-linear THz metamaterials, John F. O’Hara, Jiangfeng Zhou, Dibakar Roy Chowdhury, Matthew Reiten and Antoinette Taylor, IWEM IV, Albuquerque, USA, (2010)
    12. Multilayer Terahertz Metamaterials: Interactions Between Layers Within the Deep-Subwavelength Limit, Matthew T. Reiten, Abul K. Azad, Dibakar Roy Chowdhury, Antoinette J. Taylor and John F. O'Hara, IRMMW-THz, Rome, Italy, (2010)
    13. A simple approach for local variation in dielectric properties of PMMA by embedding monodisperse Gd2O3 nanoparticles from gas phase, I. Aruna, D Roy Chowdhury, R. Theissman, V. V. Shwartsman, F. E. Kruis and R. Schmechel, MRS, San Francisco, CA, USA (2011)
    14. Tunability of fundamental resonance in laterally coupled terahertz metamaterial, Dibakar Roy Chowdhury, Ranjan Singh, Matthew Reiten, Antoinette Taylor and John F. O'Hara, Optical Terahertz Science and Technology (OTST), Santa Barbara, CA, USA (2011)
    15. Resonance Tuning behavior in closely spaced inhomogeneous bilayer metamaterials, M. Reitten, Dibakar Roy Chowdhury, J. Zhou, A. J. Taylor, J. F. O’Hara and A. Azad, Optical Terahertz Science and Technology (OTST), Santa Barbara, CA, USA (2011)
    16. Passive resonance tuning through closely spaced coupled split ring resonators, Matthew T. Reiten, Dibakar Roy Chowdhury, Jiangfeng Zhou, John F. O’Hara, Antoinette J. Taylor and Abul Azad, Conference on Lasers and Electro-Optics (CLEO), Baltimore, Maryland, USA (2011)
    17. Active tuning of coupled resonance modes in terahertz metamaterials, Dibakar Roy Chowdhury, Abul K. Azad, Matthew Reiten, Antoinette J. Taylor and John F. O’Hara, Conference on Lasers and Electro-Optics (CLEO), Baltimore, USA (2011)
    18. Tailored resonator coupling for modifying the Fundamental Resonance in Laterally coupled Terahertz Metamaterials, Dibakar Roy Chowdhury, Ranjan Singh, Matthew Reiten, Antoinette J. Taylor and John F. O’Hara, IRMMW-THz, Houston, Texas, USA (2011)
    19. Metamaterial absorbers and anti-reflection coatings: Experiments and theory, J. Zhou, J. F. O’Hara, L. Huang, Dibakar Roy Chowdhury, M. T. Reiten, A. K. Azad, T. Koschny, C. M. Soukoulis, A. J. Taylor and H.-T. Chen, META 2012, Paris, (2012)
    20. Silicon in split ring resonator gap: an efficient route to achieve reconfigurable metamaterials, Dibakar Roy Chowdhury, Ranjan Singh, John F. O’Hara, Hou-Tong Chen, Antoinette J. Taylor and Abul K. Azad, IWEM, Albuquerque, USA (2012)
    21. Photo-doped silicon in split ring resonator gap towards dynamically reconfigurable terahertz metamaterials, Dibakar Roy Chowdhury, Ranjan Singh, John F. O’Hara, Hou-Tong Chen, Antoinette J. Taylor and Abul K. Azad, CLEO, San Jose, USA (2012)
    22. Broadening of fundamental resonance via nested resonators in terahertz metamaterials, Dibakar Roy Chowdhury, Ranjan Singh, Matthew Reiten, Hou-Tong Chen, Antoinette J. Taylor, John F. O’Hara and Abul K. Azad, CLEO, San Jose, USA (2012)
    23. A novel approach to further decrease the thickness of ultrathin perfect metamaterial absorbers, L. Huang, Dibakar Roy Chowdhury, S. Ramani, M. T. Reiten, S. Luo, A. K. Azad, A. J. Taylor, and H.-T. Chen, International Workshop on Metamaterials, Nanjing, China (2012)
    24. Metamaterial cavities: Theory, experiments, and applications, N. Grady, L. Huang, Dibakar Roy Chowdhury, S. Ramani, M. T. Reiten, A. K. Azad, A. J. Taylor, and H.-T. Chen, MRS Fall Meeting, Boston, MA, USA (2012)
    25. Characterization of TbAs nanoparticles embedded in GaAs using pump probe measurements of carrier relaxation dynamics, Laura Vanderhauf, Abul Azad, Dibakar Roy Chowdhury, Corey Bomberger, Joshua Zide, and Matthew Doty, APS March Meeting, Balitmore, Marryland, USA (2013)
    26. Metamaterials for broadband linear polarization conversion and near-perfect anomalous reflection and transmission, Nathaniel Grady, Jane Heyes, Dibakar Roy Chowdhury, Yong Zeng, Antoinette Taylor, Diego Dalvit, Hou-Tong Chen, 4th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META 2013), Sharjah, UAE (2013)
    27. Dark Plasmonic Modes Excitation through Symmetry Breaking, Xiaofang Su, Dibakar Roy Chowdhury, Yong Zeng, Xiaoshuang Chen, and Abul Azad, META’14, Singapore (2014)
    28. Resonance Modulations in Metamaterials, Dibakar Roy Chowdhury, Indian Innovations in Materials Research, Calcutta, India (2015)
    29. Terahertz guided mode propagation in a planar plasmonic waveguide and slow slow light properties, Maidul Islam, Dibakar Roy Chowdhury, and Gagan Kumar, International Conference on Fibre Optics and Photonics, IIT Kanpur (2016)
    30. Near Field Inductive Coupling in Terahertz Metamaterials, S Jagan Mohan Rao, Gagan Kumar, and Dibakar Roy Chowdhury, JSAP-OSA Joint symposia, Tokyo, Japan (2017)
    31. Electromagnetic response of dielectric nanostructures, S Amarganti, D Roy Chowdhury, M Ratvik, and J Dontabhaktuni, Emerging Liquid Crystal Technologies, SPIE Photonics West, San Francisco, USA (2018)
    32. Tuning near field capacitive coupling in planar terahertz metamaterials, S Jagan Mohan, Maidul Islam, Gagan Kumar and Dibakar Roy Chowdhury, SPIE Photonics West, San Francisco, USA (2018)
    33. Controlling extra ordinary transmission through hole arraysusing sub wavelength periodic structures, N Lok Abhishikht, S Banerjee, S Rangu, S Kamireddy, A K Azad, and Dibakar Roy Chowdhury, OSA Photonics Congress, Zurich, Switzerland (2018)
  • Experience
    • Associate Professor, Mahindra École Centrale, India, 2015 -
    • Scientist - level B, Australian National University, Canberra, Australia 2013 - 2015
    • Postdoctoral research associate, Los Alamos National Laboratory, NM, USA 2009 - 2013
    • Postdoctoral research associate, University of Duisburg-Essen, Duisburg, Germany, 2008 - 2009
    • Graduate Research Assistant, Technical University of Darmstadt, Darmstadt, Germany, 2003 - 2008
  • Others

    REVIEWER

    • Optics Letters (OL)
    • Applied Optics (AO)
    • Journal of Optics (JOPT)
    • Applied Physics Letters (APL)
    • Current Applied Physics (CAP)
    • Journal of NanoPhotonics (JNP)
    • Journal of Applied Physics (JAP)
    • Smart Materials Structures (SMS)
    • Progress In Electromagnetic Research (PIER)
    • Scientific Report: Nature group of Journals (SR)
    • IEEE Photonics Technology Letters (IEEE-PTL)
    • Journal of Physics D: Applied Physics (JPHYSD)
    • IEEE Transactions on NanoTechnology (TNANO)
    • IEEE Journal of Lightwave Technology (IEEE-JLT)
    • IEEE Journal of the Electron Devices Society (J-EDS)
    • American Chemical Society Photonics (ACS-Photonics)
    • IEEE Antennas and Propagation Magazine (IEEE-APM)
    • Journal of Infrared Millimeter and Terahertz Waves (JIMT)
    • Journal of ElectroMagnetic Waves and Applications (JEMWA)
    • International Journal of Electronics and Communications (IJEC)
    • IEEE Journal of Selected Topics in Quantum Electronics (JSTQE)
    • Photonics and Nanostructures-Fundamentals and Applications (PNFA)

    MEMBERSHIP TO PROFESSIONAL BODIES:

    • Member Optical Society of America (OSA)
    • Fellow Optical Society of India (OSI)
    • Fellow Institute of Electronics and Telecommunication Engineers (IETE)

    COLABORATORS:

    • Dr. Antoinette J. Taylor (Los Alamos National Laboratory, USA)
    • Dr. Abul Azad (Los Alamos National Laboratory, USA)
    • Prof. Weili Zhang (Oklahoma State University, USA)
    • A/Prof. John O’Hara (Oklahoma State University, USA)
    • A/Prof. Gagan Kumar (IIT Guwahati, India)
    • Asst. Prof. Ranjan Singh (Nanyang Technological University, Singapore)
    • Dr. S S Prabhu (Tata Institute of Fundemental Research, India)
    • Prof. Michael Feiginov, (TU-Wien, Vienna, Austria)

    EXTERNAL RESEARCH FUNDS

    • Project Title: "Metamaterials induced perfect absorption in thin film absorber"
      Early Career Research Award
      Funding agency: Department of Science and Technology (DST), India
      Amount Funded: 29.68 L (as PI)
    • Project Title: "Electromagnetic Metamaterials based ultra thin film sensors"
      Extra Mural Research (EMR)
      Funding agency: Department of Science and Technology (DST), India
      Amount Funded: 37.86 L (as PI)
    • Project Title: "Metamaterials for phase control of Resonant Tunneling Diode based oscillators"
      Indo Austria International Research Funding Scheme
      Funding agency: Department of Science and Technology (DST), India
      Amount Funded: 20 L (approx.) (as PI)
    • Project Title: "Complex Dielectric Structures as Tunable Metamaterials"
      Extra Mural Research (EMR)
      Funding agency: Department of Science and Technology (DST), India
      Amount Funded: 24.45 L (as Co-PI)
    • Project: IEEE WRAP 2017 (Conference in Photonics, 17 - 19 December, 2017)
      Amount Funded: 8000.00 USD (5.2 L INR)
      Funding Agency: IEEE Photonics Society

    Invited Talks:

    • Metamaterials for Terahertz Applications, Dibakar Roy Chowdhury, IEEE Experts Lecture, SAC, ISRO, Ahmedabad, India (2018)
    • Thin Film Sensing with Terahertz Metamaterials, Dibakar Roy Chowdhury, Optical Society of India (OSI) Conference, IIT Kanpur, Kanpur, India (2018)
    • Active and Passive Tuning of Terahertz Metamaterials Responses, Dibakar Roy Chowdhury, University Lecture, Technical University of Vienna, Vienna, Austria (2018)
    • Strongly near field coupled electromagnetic metamaterials, Dibakar Roy Chowdhury, Optical Society of India (OSI) Conference, Hissar, Haryana, India (2017)
    • How to publish research papers in high impact journals, Dibakar Roy Chowdhury, IEEE Young Professionals Meeting, IIIT Hyderabad, Hyderabad (2017)
    • Interactions of Terahertz Radiations with Metamaterials, Dibakar Roy Chowdhury, Terahertz Spectroscopy, TEQIP, IIT Kharagpur (2017)
    • Effect of resonator displacements in inductively coupled Terahertz Metamaterials, Dibakar Roy Chowdhury, URSI Regional Conference on Radio Science (URSI- RCRS), Tirupati, India (2017)
    • Metamaterials based Photonic Structures for Terahertz wavelengths, Dibakar Roy Chowdhury, TEQIP, Andhra University, Vizag (2017)
    • Near field coupled Terahertz Metamaterials, Dibakar Roy Chowdhury, PHOTONICS 2016, IIT Kanpur, Kanpur, India (2016)
    • Metamaterials based Photonics Structures for Terahertz, Dibakar Roy Chowdhury, Advancement and applications of ultrashort Laser pulses, TEQIP II, IIT Guwahati (2016)
    • Resonance Modulations in Electromagnetically Coupled Terahertz Metamaterials, Dibakar Roy Chowdhury, IEEE Optical MEMS and Nanophotonics (IEEE OMN), NUS, Singapore (2016)
    • Near Field Coupled Terahertz Metamaterials, Dibakar Roy Chowdhury, SPIE Terahertz Devices, Baltimore, USA (2016)
    • Terahertz Metamaterials, Dibakar Roy Chowdhury, Workshop on Terahertz Technology, IIT Delhi (2015)
    • Near field coupled Metamaterials for Terahertz Wavelengths, Dibakar Roy Chowdhury, Conference on Computational Physics (CCP), IIT Guwahati (2015)
    • Resonance Modulations in Terahertz Metamaterials, Dibakar Roy Chowdhury, Terahertz Technology Current Scenario and Future Trends, Thiruvananthapuram, India (2015)
    • Ultrafast Active Terahertz Metamaterials, Dibakar Roy Chowdhury, Central Glass and Ceramic Research Institute (CGCRI), Calcutta, India (2015)
    • Ultrafast Active Terahertz Metamaterials, Dibakar Roy Chowdhury, Molecular Materials Meetings (M3), Singapore (2014)
    • Ultrafast Active Terahertz Metamaterials, Dibakar Roy Chowdhury, Focussed Discussion Meeting on Metamaterials and Nanostructures, Kanpur, India (2013)
    • High frequency behavior of Resonant Tunneling diode and modulation of resonances in terahertz metamaterials, Dibakar Roy Chowdhury, Ruhr University, Bochum, Germany (2012)
    • Resonant Tunneling diode and resonance modulation in split ring resonators, Dibakar Roy Chowdhury, Indian Institute of Science, Bangalore, India (2011)
    • Negative Differential conductance of Resonant Tunneling Diode at high frequencies, Dibakar Roy Chowdhury, Technical University of Eindhoven, Eindhoven, Netherlands, (2008)

    VISITING FACULTY:

    Centrale Supelec (CS) Paris (Summer 2016)

    PhD STUDENTS UNDER SUPERVISION:
    • S Jagan Mohan, (2015 - )
    • Rakesh Kumar, (2017 - )
    • Deepak Kumar, (2017 - )
    • Sabyasachi Banerjee, (2017 - )
    • Subhajit Karmakar, (2017 - )
    POST DOCTORAL FELLOW UNDER SUPERVISION:

    Dr. Shahajahan, PhD from Jamia Milia Islamia, Project Title "Fabrication of Terahertz Metamaterials"