We demonstrate all-optical modulation based on ultrafast optical carrier injection in a GaAs photonic crystal cavity using a degenerate pump-probe technique. The observations agree well with a coupled-mode model incorporating all relevant nonlinearities. The low switching energy , small energy absorption , fast on-off response , limited only by carrier lifetime, and a minimum 10 dB modulation depth suggest practical all-optical switching applications at high repetition rates.
Ultrafast all-optical modulation in GaAs photonic crystal cavities
Chad Husko, Alfredo De Rossi, Sylvain Combrié, Quynh Vy Tran, Fabrice Raineri, Chee Wei Wong; Ultrafast all-optical modulation in GaAs photonic crystal cavities. Appl. Phys. Lett. 12 January 2009; 94 (2): 021111. https://doi.org/10.1063/1.3068755
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