Method for detecting relaxation time of carrier on optically activated deep level for mercury cadmium telluride material
A technology of mercury cadmium telluride and carriers, applied in the direction of transmittance measurement, etc., can solve the problem that the deep energy level cannot be provided independently and separately, and achieve the effect of optimizing design and performance improvement, and simplifying the process steps
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[0012] The specific embodiments of the present invention will be further described in detail below with reference to examples and drawings.
[0013] Using picosecond pump-detection system, such as figure 1 Shown. The laser pulse is 1064nm laser output by the Nd:YAG laser, the pulse duration is 30ps, and the repetition frequency is 10Hz. The output light is split into two beams through the beam splitting lens (BS1), and one beam is incident on the sample through the variable delay line and lens L3 as the probe light. Another beam of transmitted light passes through the beam splitter lens (BS2) to split a beam of reference light, and the rest is focused on the sample by lens L4 as pump light. By adjusting the angles of the Glan prism and the polarizer, the intensity ratio of the pump light to the probe light can be adjusted to approximately 10:1. Adjust the collimation of the light path so that the pump light and the probe light coincide on the sample and the probe light spot d...
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