Abstract

We have observed phase-conjugate signals in n-type Hg_1−xCd_xTe through bandgap-resonant degenerate four-wave mixing by using a chopped cw-CO₂ laser pump operating at 10.6 μm and ∼1 W/cm². The observed signals are attributed to the strong resonant third-order nonlinearity [χ⁽³⁾] arising from the electron–hole pair production by the pump laser. Our data translate into a value of χ⁽³⁾ ∼3 × 10⁻² esu, which is in good agreement with that calculated using the model of Jain et al. [Appl. Phys. Lett. 35, 494 (1979)].

© 1981 Optical Society of America

Optical phase conjugation in Hg_{1 −}xCdxTe

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