CANCELED! Photonics Society – Ultrafast (100GHz) Modulation of LEDs

March 8, 2018 @ 7:00 pm – 8:30 pm America/New York Timezone
MIT Lincoln Laboratory
3 Forbes Rd
Lexington, MA 02421


Photonics Society

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.

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

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.

Meeting Details: This meeting begins at 7 PM Thursday, March 8th, 2018 and will be located 3 Forbes Road, Lexington, MA, 02420.

Note this is a satellite location ~1.5mi away from MIT Lincoln Laboratory. The meeting is free and open to the public. All are welcome.

Prior to the seminar there will be social time and networking from 6:30 – 7:00PM. Dinner will also be provided.

The seminar will begin at 7:00PM.

For more information contact Ajay Garg, IEEE Boston Photonics Society chair at, or visit the IEEE Boston Photonics Society website at

Directions to Forbes Rd Lincoln Laboratory: (from interstate I-95/Route 128)

• Take Exit 30B onto Marrett Rd in Lexington – Merge into left lane
• Make the first Left onto Forbes Rd.
• Proceed straight through the small rotary and enter the parking lot.
• The entrance is by the flags.