Ultrafast nonlinear tuning of the reflection properties of AlGaAs photonic crystal waveguides by two-photon absorption

We have studied the power-dependent wavelength shift of photonic coupling resonances of a two-dimensional photonic crystal waveguide by reflection geometry pump-probe measurements. The quadratic response is indicative of two-photon induced carrier creation, which alters the refractive index of the s...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 2004-11, Vol.96 (9), p.4729-4734
Main Authors: Bristow, A. D., Kundys, D. O., García-Déniz, A. Z., Wells, J.-P. R., Fox, A. M., Skolnick, M. S., Whittaker, D. M., Tahraoui, A., Krauss, T. F., Roberts, J. S.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have studied the power-dependent wavelength shift of photonic coupling resonances of a two-dimensional photonic crystal waveguide by reflection geometry pump-probe measurements. The quadratic response is indicative of two-photon induced carrier creation, which alters the refractive index of the semiconductor core of the photonic lattice. A free-carrier model is used to simulate the phenomenon, giving values of the change in refractive index per unit carrier density that satisfactorily compare to values calculated for bulk AlGaAs under similar conditions. Time-resolved spectra are also presented, showing relaxation times of
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1790569