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4 November 2016 InGaAsP/InP-air-aperture microcavities for single-photon sources at 1.55-μm telecommunication band
Sijie Guo, Yanzhen Zheng, Zhuo Weng, Haicheng Yao, Yuhao Ju, Lei Zhang, Zhilei Ren, Ruoyao Gao, Zhiming M. Wang, Hai-Zhi Song
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Proceedings Volume 10027, Nanophotonics and Micro/Nano Optics III; 100270R (2016) https://doi.org/10.1117/12.2247841
Event: SPIE/COS Photonics Asia, 2016, Beijing, China
Abstract
InGaAsP/InP-air-aperture micropillar cavities are proposed to serve as 1.55-μm single photon sources, which are indispensable in silica-fiber based quantum information processing. Owing to air-apertures introduced to InP layers, and adiabatically tapered distributed Bragg-reflector structures used in the central cavity layers, the pillar diameters can be less than 1 μm, achieving mode volume as small as ~(λ/n)3, and the quality factors are more than 104 - 105, sufficient to increase the quantum dot emission rate for 100 times and create strong coupling between the optical mode and the 1.55- μm InAs/InP quantum dot emitter. The mode wavelengths and quality factors are found weakly changing with the cavity size and the deviation from the ideal shape, indicating the robustness against the imperfection of the fabrication technique. The fabrication, simply epitaxial growth, dry and chemical etching, is a damage-free and monolithic process, which is advantageous over previous hybrid cavities. The above properties satisfy the requirements of efficient, photonindistinguishable and coherent 1.55-μm quantum dot single photon sources, so the proposed InGaAsP/InP-air-aperture micropillar cavities are prospective candidates for quantum information devices at telecommunication band.
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Sijie Guo, Yanzhen Zheng, Zhuo Weng, Haicheng Yao, Yuhao Ju, Lei Zhang, Zhilei Ren, Ruoyao Gao, Zhiming M. Wang, and Hai-Zhi Song "InGaAsP/InP-air-aperture microcavities for single-photon sources at 1.55-μm telecommunication band", Proc. SPIE 10027, Nanophotonics and Micro/Nano Optics III, 100270R (4 November 2016); https://doi.org/10.1117/12.2247841
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KEYWORDS
Optical microcavities
Telecommunications
Quantum dots
Quantum information processing
Quantum information
Single photon
Fabrication
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