Emissions from single localized states observed in ZnCdS ternary alloyu mesa structuresd

概要

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Sharp and discrete emission lines from single localized states in ZnCdS ternary alloys were clearlyobserved from selectively grown mesa structures. This is a demonstration that compoundsemiconductor alloy systems, which usually show broad emission spectra due to alloy fluctuations,are able to exhibit emissions from discrete energy levels with quasi-zero-dimensional density ofstates in limited mesa areas where limited number of deeper localized states will contribute.Introduction of ZnCdS/MgS short-period superlattices is found to play a significant role for theexciton migration enhancement from shallower to deeper localized states, which makes theobservation of the emission lines from the single localized states possible in the ZnCdS alloy layers.
American Institute of Physicsの論文