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High extractive single-photon emissions from InGaAs quantum dots on a GaAs pyramid-like multifaceted structure

Hsiang-Szu Chang¹, Chieh-Ming Hsu, Wen-Yen Chen

¹Department of Physics and Center for Nano Science and Technology, National Central University, Jhong-li 32001, Taiwan, Republic of China.

|August 6, 2011

Abstract:

This work investigates the single-photon emissions from self-assembled InGaAs quantum dots that are grown on an apex plane of a GaAs pyramid-like multifaceted structure. The number of QDs on a multifaceted structure is estimated by scanning electron microscopy. Single-exciton emissions from individual quantum dots are examined by micro-photoluminescence and by making photon correlation measurements. This experiment demonstrates the improvement of the single-photon extraction efficiency as quantum dots are grown on a reduced apex plane of a multifaceted structure.

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