Design of an efficient light-emitting diode with 10 GHz modulation bandwidth

Fattal, D.; Fiorentino, M.; Tan, M.; Houng, D.; Wang, S. Y.; Beausoleil, Raymond G.
December 2008
Applied Physics Letters;12/15/2008, Vol. 93 Issue 24, p243501
Academic Journal
We present a high-speed light-emitting-diode (LED) design for efficient modulation at speeds higher than 10 GHz. It relies on a tensile-strain GaAsP quantum well coupled with surface plasmon polaritons on a silver surface. We present optical pumping experiments showing a tenfold reduction in carrier lifetime when the quantum well is located 40 nm above the silver surface. We believe this represents the first step toward an efficient LED compatible with 10 GHz modulation speed for use in short distance optical communication systems.


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