Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session GG01: V: Nanostructures and Metamaterials
12:30 PM–2:18 PM,
Monday, March 20, 2023
Room: Virtual Room 1
Sponsoring
Unit:
DMP
Chair: James Rondinelli, Northwestern University
Abstract: GG01.00004 : Exceptional point based sensing via nanostructured photonic waveguide*
1:06 PM–1:18 PM
Presenter:
Parul Sharma
(Indian Institute of Technology Bombay)
Authors:
Parul Sharma
(Indian Institute of Technology Bombay)
Brijesh Kumar
(Laboratory of Optics of Quantum materials, IIT Bombay)
ANSHUMAN KUMAR
(Indian Inst of Tech-Bombay)
Here, we theoretically propose an EP sensor based on a grating waveguide structure of Silicon Nitride (Si3N4). We use finite element method-based numerical simulation (COMSOL Multiphysics) to calculate the eigenspectrum for our structure. We optimize our structure to support an EP at the wavelength of 635 nm. We confirm the EP by observing a polynomial intensity profile along the grating, as opposed to exponential, even for a lossy medium. We show the application of our optimized design for the development of an ultrahigh sensitivity refractive index sensor exploiting the physics of EPs.
*Department of Physics, IITB; IITBNF; IRCC IITB
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