Coherent single photon source

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	Coherent single photon source
其他题名	Coherent single photon source
	LODAHL, PETER; DREESSEN, CHRIS, LENNART; TIGHINEANU, PETRU; SØRENSEN, ANDERS, SØNDBERG; MIDOLO, LEONARDO
	2018-11-22
专利权人	KØBENHAVNS UNIVERSITET
公开日期	2018-11-22
授权国家	世界知识产权组织
专利类型	发明申请
摘要	The invention relates to coherent single photon sources that provide photons with a high degree of indistinguishability. It is a disadvantage of single photon sources based on QDs in nanophotonic structures that, even at low temperatures, acoustic vibrations interact with the QDs to reduce the coherence of the emitted spectrum. The invention uses mechanical clamping of the nanostructure to damp vibrations leading to a weaker QD – phonon coupling and a higher degree of indistinguishability between successively emitted photons. The clamp is mechanically connected to the length of the photonic nanostructure and has a stiffness and a size sufficient to suppress low frequency vibrations (ω ≤ 10 GHz) in a combined structure of the clamp and the nanostructure.
其他摘要	本发明涉及相干单光子源，其提供具有高度不可区分性的光子。基于纳米光子结构中的QD的单光子源是不利的，即使在低温下，声振动也与QD相互作用以降低发射光谱的相干性。本发明使用纳米结构的机械夹持来抑制振动，导致较弱的QD - 声子耦合和连续发射的光子之间的较高程度的不可区分性。夹具机械连接到光子纳米结构的长度，并且具有足以抑制夹具和纳米结构的组合结构中的低频振动（ω≤10GHz）的刚度和尺寸。
主权项	A coherent single photon source with wavelength λ, comprising an elongated, semiconductor photonic nanostructure and a self-assembled quantum dot positioned inside the photonic nanostructure, wherein the photonic nanostructure has a cross-sectional area smaller than 2 μηη 2, the single photon source further comprising an elongated clamp formed in a material that is transparent and has a refractive index smaller than 2 at the wavelength λ, wherein the clamp is mechanically connected to the length of the photonic nanostructure and has a stiffness and a size sufficient to suppress low frequency vibrations (ω≤ 10 GHz) in a combined structure of the clamp and the nanostructure.
申请日期	2018-05-18
专利号	WO2018210394A1
专利状态	未确认
申请号	PCT/DK2018/050115
公开（公告）号	WO2018210394A1
IPC 分类号	G02B6/10 \| B82Y20/00 \| H01L33/00 \| H01S5/00
专利代理人	PLOUGMANN VINGTOFT A/S
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/51769
专题	半导体激光器专利数据库
作者单位	KØBENHAVNS UNIVERSITET
推荐引用方式 GB/T 7714	LODAHL, PETER,DREESSEN, CHRIS, LENNART,TIGHINEANU, PETRU,et al. Coherent single photon source. WO2018210394A1[P]. 2018-11-22.