Article

Ultimate fast optical switching of a planar microcavity in the telecom wavelength range

Applied Physics Letters (Impact Factor: 3.3). 02/2011; 98(16). DOI: 10.1063/1.3580615
Source: arXiv

ABSTRACT

We have studied a GaAs-AlAs planar microcavity with a resonance near 1300 nm
in the telecom range by ultrafast pump-probe reflectivity. By the judicious
choice of pump frequency, we observe a ultimate fast and reversible decrease of
the resonance frequency by more than half a linewidth due to the instantaneous
electronic Kerr eff?ect. The switch-on and switch-off? of the cavity is only
limited by the cavity storage time of ?tcav = 0.3ps and not by intrinsic
material parameters. Our results pave the way to supra-THz switching rates for
on-chip data modulation and real-time cavity quantum electrodynamics.

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