Colloquia & Guest Speakers

Achieving Ultra-High Energy Density in On-Chip Photonic Resonators

Dr. Sharon Weiss, Vanderbilt University

Monday, March 18, 2019
3:30 p.m.

Goergen 101

Sharon Weiss


The ability to highly localize light with strong electric field enhancement is critical for enabling higher-efficiency light sources, modulators, and solar cells, and can dramatically enhance nonlinear properties. While deep-subwavelength modes with high field enhancement can be realized with plasmonic resonators, large losses in these metal structures preclude most practical applications. In this presentation, we discuss the design and experimental demonstration of a silicon bowtie photonic crystal structure that supports mode volumes commensurate with plasmonic elements and quality factors that reveal ultralow losses. The electric field energy density in the center of the cavity is estimated to be 106times larger than the input waveguide energy density. Both the electromagnetics principles underlying the design of the bowtie photonic crystal and potential applications of the fabricated structure will be addressed.


Sharon Weiss is a Cornelius Vanderbilt Chair in Engineering and Professor of Electrical Engineering, Physics, and Materials Science at Vanderbilt University. She also serves as Deputy Director of the Vanderbilt Institute of Nanoscale Science and Engineering (VINSE).  Prof. Weiss received her Ph.D. degree from the Institute of Optics at the University of Rochester.  Her research group primarily focuses on silicon photonics for optical biosensing and optical communication, as well as hybrid and nanocomposite material systems. Prof. Weiss is a Fellow of SPIE and OSA and has been awarded a Presidential Early Career Award for Scientists and Engineers (PECASE), an NSF CAREER award, an ARO Young Investigator Award, and an IEEE Photonics Society Distinguished Lecturer award.

Location: Goergen 101

Refreshments will be served.