Abstract.
We have studied backward-degenerate four-wave mixing at CO2 laser wavelengths in n-type Ge having a free electron density of N=5×1016 cm-3. The phase conjugation due to the redistribution of free electrons between the equivalent valleys was observed. The effect occurs only when the electric field E of the light wave is aligned nonsymmetrically relative to the long axes of the valleys in the crystal, and is related to carrier heating by the infrared radiation.
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Received: 11 April 2000 / Revised version: 13 September 2000 / Published online: 10 January 2001
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Poroshin, V., Vasetskii, V. Infrared phase-conjugate reflection by hot electron-induced optical nonlinearity in n-Ge . Appl Phys B 72, 323–325 (2001). https://doi.org/10.1007/s003400100489
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DOI: https://doi.org/10.1007/s003400100489