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About                             


Welcome to the home page of Terahertz photonics and plasmonics laboratory at the Indian Institute of Technology Guwahati, India. The laboratory, led by Dr. Gagan Kumar conduct research in terahertz plasmonics and metamaterials, guided wave devices, nanoporous silicon and applications, surface plasmon assisted surface enhanced Raman scattering and absorption etc. The research activities involve both theory and experiment with the aim to develop new devices and sensors with improved speed and sensitivity. In the ongoing projects, the primary research focus of the laboratory has been to demonstrate terahertz plasmonic devices using corrugated structures and explore near field coupling in terahertz metamaterials and sensors. Our research activities are currently supported by the Science and Engineering Research Board (SERB), Board of Research in Nuclear Sciences (BRNS) and the Indian Institute of Technology Guwahati. More details on the ongoing research projects can be followed through our publication page.


Recent Publications
  • Angana Bhattacharya et al. " Excitation of near field coupled dual toroidal resonances in a bilayer terahertz metamaterial configuration." Journal of Physics D: Applied Physics 54,285102(2021)

  • KM Dhriti et al. " Plasmon-induced transparency in an air–dielectric grooved parallel-plate terahertz waveguide." Journal of the Optical Society of America B 38(4), 1290-1296(2021)

  • Maidul Islam et al. " Tunable control of electromagnetically induced transparency effect in a double slot terahertz waveguide" Optics Communications, 483 126632(2021)

  • Rakesh Sarkar et al. " Polarization independent double-band electromagnetically induced transparency effect in terahertz metamaterials" Journal of Optics, 22 035105(2020)
  • Updates

    • Best Paper Award for "Planar Plasmonic Terahertz Waveguides for Sensor Applications" in ICOLS 2018 held in Zurich on Jan. 15-16, 2018

    • S Jagan M Rao defended his thesis in March 2020.
    • K M Devi defended her thesis in September 2019.
    • Maidul Islam defended his thesis in April 2018.
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