RCQM/ECE Seminar "Broadband plasmonics in the optical and THz range"

Date & Time: April 19th (Thu) 4:00-5:00 p.m.

Venue:  BRK 200

 

Speaker: Prof. Venu Gopal Achanta, Tata Institute of Fundamental Research, Mumbai, India

Title: Broadband plasmonics in the optical and THz range

 

Abstract:

Periodic metal-dielectric structures, plasmonic crystals, are designed for specific studies and need to be redesigned for different materials or scaled for different wavelength regions. This limits their application in modulating the material properties. In order to extend plasmonics to wider materials, it would help to have metamaterials with near-dispersionless response over broadband. Plasmonic quasicrystals offer such broadband, dispersionless response. In this talk, I will present plasmonic quasicrystals in the visible and near infrared wavelength ranges. After discussing their linear and nonlinear optical properties as well as interesting near-field response, some of their applications like beam shift of wavepackets, magneto-plasmonics over multiple bands, and others will be presented.

In the 2nd half of the talk, I will present results on THz plasmonic materials. Fano resonances are well studied in a wide variety of structures. Plasmon induced transparency in metamaterials is shown to result in Fano lineshapes. We demonstrate quadrupole-quadrupole interactions as a new paradigm to control the Q factor of Fano resonance. For sensor and communication applications, I will present results on miniature Yagi-Uda antenna, and whispering gallery modes with room temperature Q factors of about 105 in THz range.

 

Bio: Venu Gopal Achanta did his Masters from Central University Hyderabad and Ph.D. in Physics from Tata Institute of Fundamental Research (TIFR), Mumbai in 2000. He later earned Ph.D. in Electronics from Tokyo University. He worked as a NEDO Fellow in the Pulse Distribution Technology Group, FESTA Laboratories (headquarters of Japanese National Femtosecond Technology Project), Tsukuba, Japan between 2000 and 2003 and as a JST Fellow in the Quantum Information Technology Group, Basic Research Labs, NEC Tsukuba, Japan. He joined as a faculty at TIFR, Mumbai in 2004 where he is currently an Associate Professor. His research interests are in quantum information processing and plasmonics. He has more than 100 journal publications. He is a senior member of IEEE and member of OSA.

Speaker: Venu Gopal Achanta
Speaker Venu Gopal Achanta
Bio: Venu Gopal Achanta did his Masters from Central University Hyderabad and Ph.D. in Physics from Tata Institute of Fundamental Research (TIFR), Mumbai in 2000. He later earned Ph.D. in Electronics from Tokyo University. He worked as a NEDO Fellow in the Pulse Distribution Technology Group, FESTA Laboratories (headquarters of ...

Bio: Venu Gopal Achanta did his Masters from Central University Hyderabad and Ph.D. in Physics from Tata Institute of Fundamental Research (TIFR), Mumbai in 2000. He later earned Ph.D. in Electronics from Tokyo University. He worked as a NEDO Fellow in the Pulse Distribution Technology Group, FESTA Laboratories (headquarters of Japanese National Femtosecond Technology Project), Tsukuba, Japan between 2000 and 2003 and as a JST Fellow in the Quantum Information Technology Group, Basic Research Labs, NEC Tsukuba, Japan. He joined as a faculty at TIFR, Mumbai in 2004 where he is currently an Associate Professor. His research interests are in quantum information processing and plasmonics. He has more than 100 journal publications. He is a senior member of IEEE and member of OSA.

Full Description

When?

Thu, April 19, 2018
4 p.m. - 5 p.m.
(GMT-0600) US/Central

Where?

Brockman Hall for Physics - Room 200
Brockman Hall for Physics
Houston, Texas 77005