The authors report optical studies of InP nanowires (NWs) grown by metal organic chemical vapor deposition. By means of low temperature microphotoluminescence experiments, the authors determined the optical properties of as-grown NWs. The emission of individual NWs is characterized by small linewidths as low as 2.3meV. Blueshifts of the NW emission energy between 25 and 56meV with respect to bulk InP are related to radial carrier confinement in nanowires with diameters between 15 and 50nm. Time resolved investigations reveal a low surface recombination velocity of 6×102cm∕s and indicate thermally activated nonradiative surface recombination above approximately 20K.
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Reitzenstein et al. (2007) studied this question.
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