IEEE Photonics Society

Boston Photonics Society Chapter

Boston Chapter of the IEEE Photonics Society


March 8, 2018
6:30 PM

MIT Lincoln Laboratory Forbes Road

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-- This meeting is canceled due to weather --
Ultrafast (100GHz) Modulation of LEDs

Dr. Seth Fortuna, University of California, Berkeley, Berkeley, CA


Dr. Seth Fortuna, University of California, Berkeley, Berkeley, CA

Abstract:  By coupling a light emitter to an optical antenna, it is now possible to make spontaneous emission faster than stimulated emission.  This alludes to the exciting possibility of a directly-modulated LED that is faster than the LASER. Such an antenna-coupled LED (or simply antenna-LED) is well-suited as a light source for on-chip optical communication where small size, fast speed, and high efficiency are needed to achieve the promised benefit of reduced power consumption of on-chip optical links.

In this talk, I will discuss our recent progress in developing high speed and efficient antenna-LEDs implemented in a monolithically integrated manner. I will report the experimental demonstration of an electrically-injected III-V antenna-LED with a two-order of magnitude increase in the spontaneous emission rate. It will be shown that this nanoscale device can eventually achieve >100 GHz direct modulation rate at high efficiency and is therefore a suitable light source for attojoule-per-bit on-chip optical communication.


Biography:  Seth A. Fortuna received the B.Sc. from Pennsylvania State University in 2003, M.Sc. from University of Illinois at Urbana-Champaign in 2009 and Ph.D. from the University of California, Berkeley in 2017; all in electrical engineering. His dissertation research was recognized with the 2016 Tucker Award which honors superior work and scholarship in the technology of materials used in semiconductor devices. He has previously worked in industry at Intel Corporation and Philips Lumileds working primarily on reliability and failure analysis of semiconductor devices. He is currently a postdoctoral scholar at UC Berkeley in the NSF Center for Energy Efficient Electronics Science developing novel devices for energy efficient computing and communication.


Location:  MIT Lincoln Laboratory Forbes Road