We study the time-resolved reflectivity spectrum of a switched planar GaAs-AlAs microcavity. Between 5 and 40 ps after the switching (pump) pulse, we observe a strong excess probe reflectivity and a change of the frequency of light trapped in the cavity up to 5 linewidths away from the cavity resonance. This frequency change does not adiabatically follow the fast-changing cavity resonance. The frequency change is attributed to an accumulated phase change due to the time-dependent refractive index. An analytical model predicts dynamics in qualitative agreement with the experiments, and points to crucial parameters that control future applications.
|Number of pages||5|
|Journal||Journal of the Optical Society of America. B: Optical physics|
|Publication status||Published - 2012|
Harding, P. J., Bakker, H. J., Hartsuiker, A., Claudon, J., Mosk, A., Gérard, J-M., & Vos, W. L. (2012). Observation of a stronger-than-adiabatic change of light trapped in an ultrafast switched GaAs-AlAs microcavity. Journal of the Optical Society of America. B: Optical physics, 29(2), A1-A5. https://doi.org/10.1364/JOSAB.29.0000A1