30 August 2006 Slowdown of light signals and registration of phase modulation in semiconductor crystals of CdTe at room temperature in infrared
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Abstract
We have developed model that describe transformation of time modulated optical signals by the double optical and electrical interferometer: beam coupling and holographic current in the semiconductor crystals. We consider non-local response, when dominant mechanism of the space charge formation is diffusion or drift in a high external electric field. Both phase and amplitude modulation is considered (linear ramp phase modulation, sinusoidal modulation, step-like modulation). For the sinusoidal amplitude modulation slow-down of optical signal is described. Experimental results on CdTe crystal with IR CW laser (P=100mW, wavelength 1064 nm) are in agreement with theoretical predictions. Effective group velocity was slow-downed to 555 cm/s for the modulated signal with period of 8ms.
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N. Kukhtarev, N. Kukhtarev, T. Kukhtareva, T. Kukhtareva, D. Edwards, D. Edwards, P. Land, P. Land, Todd Murray, Todd Murray, } "Slowdown of light signals and registration of phase modulation in semiconductor crystals of CdTe at room temperature in infrared", Proc. SPIE 6311, Optical Information Systems IV, 63111L (30 August 2006); doi: 10.1117/12.686736; https://doi.org/10.1117/12.686736
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