Photon energy dependence of the spin polarization |
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Authors: | M Idrish Miah |
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Institution: | Department of Physics, University of Chittagong, Chittagong, Chittagong - 4331, Bangladesh |
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Abstract: | Spin polarization in semiconductors was investigated by pump-probe measurements, where the transmissions of the samples were monitored with probe pulses with same and opposite circular polarizations. The spin polarization as a function of the pump-probe delay was estimated, and the polarization was found to decay in a sub-ns timescale. It was also found that the polarization depends strongly on photon energy of the pump beam. The pumping energy dependence of the spin polarization was discussed based on the inter-band transition probabilities. |
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Keywords: | Spin transport Spin polarization Photon energy Inter-band transition |
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