Recombination centers and the spatial distribution of spontaneous emission in n-type GaAs at high excitation levels |
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| Authors: | NN Winogradoff JE Ripper JCaetano da Silva |
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| Institution: | Instituto de Física “Gleb Wataghin” Universidade Estadual de Campinas 13.100 Campinas-SP — Brasil |
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| Abstract: | We have investigated the excitation intensity dependence of the spatial distribution of the emission of photoluminescence from heavilly doped n-type GaAs.It was found that above a certain threshold of excitation, maximum emission originated from an anular zone surrounding the point of excitation rather than from that point.This new effect is explained in terms of the quasi Fermi level dependence of the rate of recombination through recombination centers. |
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