Seminar | December 1 | 1-2 p.m. | Cory Hall, 521 Cory (Hogan Room)
Seth A. Fortuna, UC Berkeley
Using an optical antenna, it is now possible to make spontaneous emission faster than stimulated emission. This alludes to the exciting possibility of an LED 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.