Control of the nonlinear carrier response time of AlGaAs photonic crystal waveguides by sample design

P. Murzyn, A. Z. Garcia-Deniz, Dmytro O. Kundys, A. M. Fox, J.-P. R. Wells, D. M. Whittaker, M. S. Skolnick, T. F. Krauss, J. S. Roberts

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We have used reflection geometry pump-probe spectroscopy to investigate the free carrier response time of AlGaAs high refractive index contrast one-dimensional photonic crystal waveguides. We have observed pump-induced shifts of photonic resonances in the near infrared spectral region, and have studied the dependence of the decay time on the sample parameters. We find that the response time can be varied from 8 to 33 ps by changing the structure period and etch depth. This, combined with the large changes observed in the reflectivity, demonstrates excellent potential for application as ultrafast photonic switches with a controllable recovery time.

Original languageEnglish
Article number141104
JournalApplied Physics Letters
Issue number14
Publication statusPublished - 3 Apr 2006



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