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- W2071637438 abstract "We report the observation of two photon absorption which is strongly dependent on the applied electric field and the optical polarization. At 1.55 μm wavelength, the two-photon absorption coefficient of the GaAs/AlGaAs multiquantum well (MQW) waveguides for transverse-magnetic light is about seven times lower than for transverse-electric polarized light and changes by a factor of approximately 4 for a change in applied direct-current electric field of ∼140 kV/cm. Ultrafast nonlinear refraction causing phase changes of over π radians without appreciable excess loss is observed. These measurements demonstrate that GaAs/AlGaAs MQW waveguides could be successfully used for subpicosecond all-optical switching near half-band gap, at wavelengths corresponding to the 1.55 μm optical communications band." @default.
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- W2071637438 date "1991-12-23" @default.
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- W2071637438 title "Polarization and field dependent two‐photon absorption in GaAs/AlGaAs multiquantum well waveguides in the half‐band gap spectral region" @default.
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- W2071637438 doi "https://doi.org/10.1063/1.105700" @default.
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