Paper 13111-76
Paper 13111-76
Effects of defocusing on near-field intensity enhancement
19 August 2024 • 5:30 PM - 7:00 PM PDT | Conv. Ctr. Exhibit Hall A
Abstract
Aberration in an optical beam is a common practical issue which affects the quality and shape of the beam and hence important in the light matter interaction. A detailed investigation is carried out on the interaction of the tightly focused beam with a spherical nanoparticle under defocusing. Tightly focused beams with linear and radial polarization are considered for the investigation and the influence of such beam on plasmonic characteristics of a nanoparticle is analyzed. The effect of defocusing is observed on intensity enhancement in near-field in different surrounding media.
Presenter
Sarita Mehra
Indian Institute of Technology (BHU), Varanasi (India)
Sarita has done her B.Sc. Physics (H) from Delhi University, India in 2016 and M.Sc. Physics at M.D.U, Rohtak, India in 2018. She enrolled in Ph.D. Physics in July 2019 as a Research Scholar at the IIT (BHU) Varanasi, India, under the supervision of Dr. Rakesh Kumar Singh, Associate Professor, Department of Physics, IIT (BHU). Her areas of interest are Nanophotonics and Plasmonics. She is mainly working on the scattering of tightly focused beams having different polarization through plasmon assisted nanoparticles, and near-field intensity enhancement and influence of aberrations. She is proficient in performing simulations using MATLAB platform. She is an active SPIE and OPTICA student member. She has lead IIT-BHU SPIE student chapter as a treasurer from July 2019 to December 2019. Currently she is an effective leader as a secretory in IIT-BHU SPIE student chapter. She was also a part of the SAKURA student exchange program for 21 days organized by Niigata University, Japan.