[AP-S Seminar] Recent Accomplishments of Metasurfaces towards High Frequency Applications, Dr.Somak Bhattacharyya
Title:
Recent Accomplishments of Metasurfaces towards High Frequency Applications
Abstract:
Metasurface structures, being ultra-thin in nature has been emerged as applications for various frequency selective surfaces viz., absorber, polarizer, filter, phase-shifter etc. In metasurface based absorbing structures, several sorts of array of metallic patches are designed over a metal-backed dielectric material. The incorporation of metal at the bottom side prohibits the transmission of electromagnetic wave incident to the structure. A number of structures have been proposed over wide band of frequencies ranging from microwave to optical and so forth. Polarization converting structures have also been proposed using metasurface-based designs. In all these designs, asymmetry has been introduced in the unit cell so that the structure is chiral in nature. Both transmittive as well as reflective-type polarization conversion structures using metasurface designs have been reported till date. Very recently, graphene layer has been introduced in the metasurface-based designs to achieve tenability as well as enhancement of bandwidth. By control of applied chemical potential and electrical grating, the plasmonic response of the graphene can be modulated in order to achieve tunability over a wide frequency of incidence. Graphene layer has been incorporated in the unit cell of metasurface to generate wideband tunable applications.
Bio:
Somak Bhattacharyya has received his PhD degree in 2015 from Indian Institute of Technology, Kanpur, India. He had joined Department of Electronics & Communication Engineering at Indian Institute of Information Technology, Allahabad in December 2015. He has published more than 60 International Journals and 150 reputed peer-reviewed International and national conference proceedings. He has received the prestigious Young Scientist Award from International Union of Radio Sciences (URSI) three times: Electromagnetic Theory Symposium 2013 in Hiroshima, Regional Radio Science Conference 2015 in New Delhi and Asia Pacific Radio Science Conference 2016 in Seoul. Owing to his contributions in the area of radio sciences, URSI has conferred him honorary lifetime membership. Dr. Bhattacharyya is an IEEE senior member and elected as the Associate Fellow of West Bengal Academy of Science and Technology. His current areas of interest lie in metasurface, periodic structures, opto-microwave devices, microwave photonics etc.
Date: Tuesday, July 8, 2025
Time: 3:00 PM ET
Location: BA 4287, University of Toronto (40 St. George Street)
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- 40 St. George Street Toronto, ON, M5S 2E4
- Toronto, Ontario
- Canada M5S 2E4
- Building: Bahen Centre for Information Technology
- Room Number: BA4287
- Starts 02 July 2025 04:00 PM UTC
- Ends 08 July 2025 07:00 PM UTC
- No Admission Charge
Speakers
Somak Bhattacharyya
Address:Canada