Bright Single-Photon Source at 1.3 μm Based on InAs Bilayer Quantum Dot in Micropillar

• Published in: Nanoscale research letters Vol. 12; no. 1; p. 378
• Main Authors: Chen, Ze-Sheng, Ma, Ben, Shang, Xiang-Jun, Ni, Hai-Qiao, Wang, Jin-Liang, Niu, Zhi-Chuan
• Format: Journal Article
• Language: English
• Published: New York Springer US 31.05.2017; Springer Nature B.V; SpringerOpen
• Subjects: Bragg reflectors; Chemistry and Materials Science; Counting; Emission measurements; Gallium arsenide; High emission rate; Indium arsenides; Materials Science; Micropillar; Molecular Medicine; Nano Express; Nanochemistry; Nanoscale Science and Technology; Nanotechnology; Nanotechnology and Microengineering; Photon emission; Quantum dots; Single-photon source; Telecom wavelength; High emission rate; Telecom wavelength; Micropillar; Single-photon source
• ISSN: 1931-7573; 1556-276X
• DOI: 10.1186/s11671-017-2153-2

A pronounced high count rate of single-photon emission at the wavelength of 1.3 μm that is capable of fiber-based quantum communication from InAs/GaAs bilayer quantum dots coupled with a micropillar (diameter ~3 μm) cavity of distributed Bragg reflectors was investigated, whose photon extraction efficiency has achieved 3.3%. Cavity mode and Purcell enhancement have been observed clearly in microphotoluminescence spectra. At the detection end of Hanbury-Brown and Twiss setup, the two avalanched single-photon counting modules record a total count rate of ~62,000/s; the time coincidence counting measurement demonstrates single-photon emission, with the multi-photon emission possibility, i.e., g 2 (0), of only 0.14.