D. Unitt, A. Bennett, P. Atkinson, K. Cooper, P. See, D. Gevaux, M. Ward, R. Stevenson, D. Ritchie, A. Shields
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引用次数: 22
摘要
包含量子点的半导体柱微腔已显示出作为单光子和相关光子对的有效来源的希望,这可能会在量子信息处理中找到应用。本文讨论了利用这些光源来产生单光子,以及利用椭圆截面柱来增强和选择特定的光子态。单光子干涉测量也被执行,显示相干时间高达180 ps准共振泵浦点。使用光纤干涉仪的hong - ou - mandel型双光子干涉测量表明,单独产生的光子显示出很大程度的不可区分性。
Quantum dots as single-photon sources for quantum information processing
Semiconductor pillar microcavities containing quantum dots have shown promise as efficient sources of single and correlated pairs of photons, which may find applications in quantum information processing. In this paper we discuss the use of these sources to generate single photons and the use of pillars with elliptical cross-section to enhance and select a particular photon state. Single-photon interference measurements are also performed and show coherence times of up to 180 ps for quasi-resonantly pumped dots. Hong–Ou–Mandel-type two-photon interference measurements using a fibre interferometer indicate that individually created photons display a large degree of indistinguishability.