Two-photon absorption in InSb and Hg<sub>1-x</sub>Cd<sub>x</sub>Te
Alan MillerPhys. Dept., Heriot-Watt Univ., Edinburgh, UKA.M. JohnstonPhys. Dept., Heriot-Watt Univ., Edinburgh, UKJed DempseyPhys. Dept., Heriot-Watt Univ., Edinburgh, UKJ. S. SmithPhys. Dept., Heriot-Watt Univ., Edinburgh, UKC. R. PidgeonPhys. Dept., Heriot-Watt Univ., Edinburgh, UKG. D. HolahPhys. Dept., Heriot-Watt Univ., Edinburgh, UK
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ABI
Аннотация
Two-photon absorption measurements on InSb, obtained with a single mode hybrid CO2 laser, have been analysed, taking into account the fact that the laser is Gaussian in space and the effect of free-hole absorption on the temporal profile. The dependence on wavelength of the two-photon coefficient at room temperature (K2=8 cm(MW)-1 for 10.6 mu m and K2=14 cm(MW)-1 for 9.6 mu m pumping) agrees well with a new calculation including the effect of non-parabolic bands. A similar measurement on Hg0.78Cd0.22Te (K2=14.0 cm(MW)-1 for 10.6 mu m pumping) is consistent with this.
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