Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 34: Ultrashort Laser Pulses: Applications II
Q 34.6: Vortrag
Mittwoch, 10. März 2010, 15:15–15:30, F 342
Non-adiabatically changing the frequency of light in a transient microcavity — •Georgios Ctistis1, Philip J. Harding1,2, Huib Bakker2, Alex Hartsuiker2, Julien Claudon3, Allard Mosk1, Jean-Michel Gérard3, and Willem L. Vos1,2 — 1Complex Photonic Systems (COPS), MESA+ Institute for Nanotechnology, University of Twente, The Netherlands — 2Center for Nanophotonics, FOM Institute for Atomic and Molecular Physics (AMOLF), Amsterdam, The Netherlands — 3CEA-CNRS Nanophysics and Semiconductors joint laboratory, Grenoble, France
We study frequency-resolved femtosecond pump-probe reflectivity of a planar GaAs/AlAs microcavity. About 8 ps after a pump pulse, we observe an excess signal due to a non-adiabatic frequency change of the stored light by more than 4 linewidths away from the cavity resonance. Strikingly, the frequency change of light occurs at a time when the pump pulse is long gone. The frequency change is caused by the accumulated phase change of the light stored in the transient cavity. In agreement with an analytical model, the excess reflectivity is high when the cavity resonance frequency strongly shifts compared to the cavity linewidth within one cavity storage time.