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Visiting Industrial Fellows
Dr. Seth Fortuna

Electrical Engineering
Advisor: Prof. Wu

Seth A. Fortuna received the B.Sc. in Electrical Engineering from Pennsylvania State University in 2003 and the M.Sc. in Electrical and Computer Engineering from University of Illinois at Urbana-Champaign in 2009. He has previously worked in industry at Intel Corporation and Philips Lumileds working primarily on reliability and failure analysis of semiconductor devices. Since 2012, he has been at University of California, Berkeley where he is currently pursuing his Ph.D. degree in Electrical Engineering under Prof. Ming C. Wu. His current research interests include nano-photonics for use in on-chip communication.

Directly Modulated High-Speed nanoLED Utilizing Optical Antenna Enhanced Light Emission [BPN703]
Traditional semiconductor light emitting diodes (LEDs) have low modulation speed because of
long spontaneous emission lifetime. Spontaneous emission in semiconductors (and indeed most
light emitters) is an inherently slow process owing to the size mismatch between the dipole
length of the optical dipole oscillators responsible for light emission and the wavelength of
the emitted light. More simply stated: semiconductors behave as a poor antenna for its own
light emission.

By coupling a semiconductor at the nanoscale to an external antenna, the spontaneous emission
rate can be dramatically increased alluding to the exciting possibility of an LED that can be
directly modulated faster than the laser. In this project, we plan to demonstrate an antenna-
enhanced nanoscale semiconductor light emitting diode (nanoLED) with direct modulation rate >50
GHz, exceeding the bandwidth of the semiconductor laser. Such an nanoLED 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 interconnect links compared with less efficient electrical interconnect links.

Current Active Projects:

     Last Updated: Tue 2017-May-02 13:49:43

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