Ultrafast all-optical modulation in GaAs photonic crystal cavities
Appl. Phys. Lett. 94, 021111 (2009); doi:10.1063/1.3068755
Published 14 January 2009
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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.
©2009 American Institute of Physics
| History: | Received 4 November 2008; accepted 19 December 2008; published 14 January 2009 |
| Permalink: |
http://link.aip.org/link/?APPLAB/94/021111/1 |
KEYWORDS and PACS
carrier lifetime,
gallium arsenide,
high-speed optical techniques,
III-V semiconductors,
optical modulation,
optical switches,
photonic crystals,
semiconductor plasma
- 42.70.Qs
Photonic bandgap materials - 42.65.Pc
Optical bistability, multistability, and switching - 72.30.+q
High-frequency effects; plasma effects in electronic transport - 72.20.Jv
Charge carriers: generation, recombination, lifetime, and trapping (semiconductors/insulators) - 42.65.Re
Ultrafast processes; optical pulse generation and pulse compression - 42.79.Hp
Optical processors, correlators, and modulators - YEAR: 2009
RELATED DATABASES
PUBLICATION DATA
0003-6951 (print)
1077-3118 (online)
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