Biography:

Shourya Dutta Gupta is an Associate Professor in the Department of Materials Science and Metallurgical Engineering, I.I.T. Hyderabad. Before joining I.I.T. Hyderabad, he was a postdoctoral fellow at Cornell University (U.S.A.) and University of Texas at Austin (U.S.A.) from 2015 till 2017. Shourya did his B.Tech. from I.I.T. Kanpur (2010) and obtained his Ph.D. degree from Swiss Federal Institute of Technology Lausanne (Switerland) in 2015. His research interests are in the fields of plasmonics, nanophotonics, metasurfaces and employing nano-scale optical phenomena for sensing and optical modulation application. He has considerable expertise in developing plasmonic platforms for

applications in biosensing and optical modulation. He also has significant knowledge in designing optical experiments from scratch for performing various measurements in both time and frequency domains. Since 2017, Shourya has been a faculty in the MSME department at IIT Hyderabad and has set up an advanced lab for the fabrication, characterization, validation and prototyping of plasmonic devices. In particular, he has concentrated in the detection of various analytes using novel surface enhanced Raman scattering (SERS) platforms with very low detection limit and for the development of mechano-chromic (strain mediated control of color) and electrochromic (voltage/current mediated control of color) nanophotonic functional platforms. Furthermore, he has also investigated novel plasmonic phenomena in two-phase microstructurally inhomogenous Ag-Cu alloy nanostructures and thin films. Moreover, he has been active in supervising multiple students (Ph.D., M.Tech. and B.Tech.) in various projects. One of the students (Mr. Govardhan S. Reddy) received the best B.Tech. project award from the INAE for his B.Tech. work done under the supervision of the nominee. These experimental works are supported by numerical simulations (using both in house developed codes and commercial software like COMSOL) to improve the understanding in various systems. In addition he has actively collaborated with multiple leading scientists and researchers across India and abroad to enhance the quality of research and initiate multiple interdisciplinary projects.

Lecture: "Detection of bio-analytes and deformation in polymer grafted nanoparticle networks using plasmonic nanoplatforms"

In the recent years significant attention has been devoted to the development of various characterization platforms for the analysis of various analytes. In particular, vibrational spectroscopic approaches like Raman and FTIR spectroscopy have enabled the non-destructive examination of various pharmaceutical products. However, due to the small cross-section of molecules performing, it is very challenging to carry out this analysis at extremely low concentrations or in suspension (especially for FTIR analysis). In this direction, several surface enhanced spectroscopic techniques like surface enhanced Raman scattering and surface enhanced IR absorption spectroscopy have been developed to address these challenges. In the first part of the talk, I will demonstrate the ability to enhance the SERS signals from analyte molecules using various routes, especially for the development of lowcost SERS substrates. In particular, the development of novel SERS substrates using dynamically tunable critically coupled perfect absorber substrates will be demonstrated. In the second part of the talk, I will exhibit how the plasmonic resonances and SERS signals be used for tracking deformation in polymer grafted nanoparticle arrays. In this study, we integrate a multi-physics approach to evaluate the influence of mechanical deformation on the optical response.