Chaos and its diagnosis in PV-type HgCdTe detector

In our experimental research on laser irradiating semiconductor photodetectors, chaos in the PV-type HgCdTe detectors irradiated by a mild stable continuous wave laser is found. The detectors will give chaotic output when the irradiation power density of laser increases above the saturation threshold of them. Chaos is diagnosed by determining the power spectrum and Lyapunov exponent from the output signal of the detectors in this paper．