Ultrafast nonlinear response of AlGaAs/InAlGaAs MQW photonic crystal waveguides
✍ Scribed by Murzyn, P. ;Garcia-Déniz, A. Z. ;Fox, A. M. ;Wells, J.-P. R. ;Whittaker, D. M. ;Skolnick, M. S. ;Krauss, T. F. ;Roberts, J. S.
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 262 KB
- Volume
- 202
- Category
- Article
- ISSN
- 0031-8965
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✦ Synopsis
Abstract
We report ultrafast optical tuning of the reflection properties of MQW AlGaAs/InAlGaAs 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 Δ__R__ /R > 30%, this demonstrates excellent potential for application of photonic crystals as ultrafast nonlinear switches with decay times depending on the structure period. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)