Ultrafast nonlinear response of AlGaAs/InAlGaAs MQW photonic crystal waveguides

P Murzyn, AZ Garcia-Deniz, AM Fox, JPR Wells, DM Whittaker, MS Skolnick, Thomas Fraser Krauss, JS Roberts

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We report ultrafast optical tuning of the reflection properties of MQW AlGaAs/lnAlGaAs 1D photonic crystal waveguides using a reflection geometry, pump-probe technique. Very fast pump-induced shifts of photonic resonances between 800-900 nm by up to 18 nm nanometers are demonstrated. This is followed by a fast decay which varies from 5 to 30 ps depending on the sample dimensions. Together with the maximum reflectivity change of Delta R/R > 30%, this demonstrates excellent potential for application of photonic crystals as ultrafast nonlinear switches with decay times depending on the structure period.

Original languageEnglish
Pages (from-to)2653-2656
Number of pages4
JournalPhysica Status Solidi. A
Publication statusPublished - Nov 2005


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