Ultrafast all-optical modulation in GaAs photonic crystal cavities

Ultrafast all-optical modulation in GaAs photonic crystal cavities

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 ( ∼ 120   fJ ) , sma...

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Veröffentlicht in:Applied physics letters 2009-01, Vol.94 (2), p.021111-021111-3
Hauptverfasser: Husko, Chad, De Rossi, Alfredo, Combrié, Sylvain, Tran, Quynh Vy, Raineri, Fabrice, Wong, Chee Wei
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container_title Applied physics letters
container_volume 94
creator Husko, Chad
De Rossi, Alfredo
Combrié, Sylvain
Tran, Quynh Vy
Raineri, Fabrice
Wong, Chee Wei
description 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 ( ∼ 120   fJ ) , small energy absorption ( ∼ 10   fJ ) , fast on-off response ( ∼ 15   ps ) , limited only by carrier lifetime, and a minimum 10 dB modulation depth suggest practical all-optical switching applications at high repetition rates.
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title Ultrafast all-optical modulation in GaAs photonic crystal cavities
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