Gagan Kumar

Gagan Kumar

Position
Associate Professor
Location
Department of Physics, IIT Guwahati
Room No: A-201
Gagan Kumar is a member of the following research group and research areas:

Research group

Research areas

  • Terahertz Plasmonics and metamaterials, Guided Wave Devics, Ultrafast Spectroscopy.

Terahertz Photonics and Plasmonics lab, led by Dr. Gagan Kumar conduct research in plasmonics, metamaterials, guided wave devices, surface plasmon assisted 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)

Highlighted publications

  1. Journals

    • Rakesh Sarkar, Koijam Monika Devi, Dipa Ghindani, Ravikumar Jain, Arnab Pattanayak, S. S. Prabhu, Dibakar Roy Chowdhury and ,Gagan Kumar"Polarization independent dual-band electromagnetically induced transparency effect in terahertz metamaterials", Journal of Optics vol.22, no., pp.35105, [2020]

    • Rakesh Sarkar, D. Ghindani, K.M Devi, SS Prabhu, A. Ahmad and Gagan Kumar"Independently tunable electromagnetically induced transparency effect and dispersion in a multi-band terahertz metamaterial", Scientific Reports vol.9, no.1, pp.1-010, [2020]

    • S.J.M. Rao, R. Sarkar, G. Kumar and D.R. Chowdhury"Gradual Cross polarization conversion of transmitted waves in near field coupled planar terahertz metamaterials", OSA Continuum vol.2, no.3, pp.603-614, [2019]

    • A. Bhattacharya, K.M Devi, T Nguyen and Gagan Kumar"Actively tunable toroidal excitations in graphene based terahertz metamaterials", Optics Communication vol., no., pp.124919, [2019]

    • Koijam Monika Devi, Gagan Kumar and Amarendra K. Sarma"Surface polaritonic solitons and breathers in a planar plasmonic waveguide structure via electromagnetically induced transparency", Journal of the Optical Society of America B vol.36, no.-, pp.2160-2166, [2019]

    Conferences

    • Angana Bhattacharya, Koijam Monika Devi and Gagan Kumar "Toroidal Resonances in Graphene Metamaterials", 2019 Workshop on Recent Advances in Photonics (WRAP) (DOI: 10.1109/WRAP47485.2019.9013713) vol., no., pp.1 - 3, [2019]

    • Roopkiranpreet Kaur, Manpreet Kaur, P. C. Agarwal, Sukhdeep Kaur and Gagan Kumar "Simulation of Terahertz Propagation by TE Mode in Metal Dielectric Metal Waveguide", 2019 Workshop on Recent Advances in Photonics (WRAP) (DOI: 10.1109/WRAP47485.2019.9013713) vol., no., pp.1 - 3, [2019]

    • Rakesh Sarkar, Dipa Ghindani, Koijam Monika Devi, S. Jagan Mohan Rao, Shriganesh S. Prabhu and Gagan Kumar "Modulating dual-band electromagnetically induced transparency effect via near field coupling in planar terahertz metamaterials", 2019 Workshop on Recent Advances in Photonics (WRAP) (DOI: 10.1109/WRAP47485.2019.9013719) vol., no., pp.1 - 3, [2019]

    • KM Dhriti and Gagan Kumar "Study of resonant modes for sensing in a multimode planar plasmonic terahertz waveguide", 2019 Workshop on Recent Advances in Photonics (WRAP) (DOI: 10.1109/WRAP47485.2019.9013703). vol., no., pp.1 - 3, [2019]

    • R. Adarsh Bhargav, Km Dhriti, Angana Bhattacharya and Gagan Kumar "Refractive Index sensing using plasmonic mode in a periodically corrugated waveguide at terahertz frequencies", 2019 Workshop on Recent Advances in Photonics (WRAP) (DOI: 10.1109/WRAP47485.2019.9013714) vol., no., pp.1 - 3, [2019]

    • Koijam Monika Devi, Rakesh Sarkar, Amarendra Kumar Sarma and Gagan Kumar "Exploring polarization independent plasmon induced transparency in a planar terahertz metamaterial", 2019 Workshop on Recent Advances in Photonics (WRAP) (DOI: 10.1109/WRAP47485.2019.9013727) vol., no., pp.1 - 3, [2019]

    Link to all publications

Postdoctoral Fellow

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Current Research Scholar

RAKESH SARKAR

KM DHRITI

ANGANA BHATTACHARYA

BHAIROV KUMAR BHOWMIK

BHAGWAT SINGH CHOUHAN

ANSHUL BHARDWAJ


Completed Research Scholar

DR. KOIJAM MONIKA DEVI

DR. MAIDUL ISLAM

DR. S JAGAN M RAO

Completed Postdoctoral Fellow

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