Picosecond grating dynamics in GaAs and CdTe at 1.064 um

N. Brugel; P. Carnus; Michel Pugnet; Jacques H. Collet; Laurent Nardo; J. L. Iehl

doi:10.1117/12.147927

28 June 1993 Picosecond grating dynamics in GaAs and CdTe at 1.064 μm

N. Brugel, P. Carnus, Michel Pugnet, Jacques H. Collet, Laurent Nardo, J. L. Iehl

Proceedings Volume 1807, Photonic Switching; (1993) https://doi.org/10.1117/12.147927
Event: Topical Meeting on Photonic Switching, 1992, Minsk, Belarus

Abstract

Laser-induced transient gratings generated by picosecond pulses at 1.064 micrometers in GaAs and CdTe samples were used to diffract a picosecond probe pulse in the degenerate-four-wave- mixing geometry. Pulse and probe experiments performed using the same experimental set-up allowed us to measure the free-carrier lifetime. The ambipolar diffusion coefficient D was then determined by using only one laser-material geometrical configuration. In semi-insulating GaAs:Cr and CdTe:W, gratings persisted for more than one nanosecond and could be partially erased using a homogeneous picosecond pulse, the energy of which was one quarter of the writing energy. We present a model which explains these results.

Citation Download Citation

N. Brugel, P. Carnus, Michel Pugnet, Jacques H. Collet, Laurent Nardo, and J. L. Iehl "Picosecond grating dynamics in GaAs and CdTe at 1.064 μm", Proc. SPIE 1807, Photonic Switching, (28 June 1993); https://doi.org/10.1117/12.147927

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