Dielectric GaAs Antenna Ensuring an Efficient Broadband Coupling between an InAs Quantum Dot and a Gaussian Optical Beam
Dielectric GaAs Antenna Ensuring an Efficient Broadband Coupling between an InAs Quantum Dot and a Gaussian Optical Beam
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DOI：
10.1103/physrevlett.110.177402
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发表时间：
2013-04-24
影响因子：
8.6
通讯作者：
Mork, Jesper
中科院分区：
文献类型：
--
作者：
Munsch, Mathieu;Malik, Nitin S.;Mork, Jesper
我们介绍了光子喇叭，这是一种介电结构，可确保嵌入式量子光源和高斯自由空间光束之间近乎完美的耦合。光子喇叭利用单模光子线提供的宽带自发发射控制以及该模式在圆锥形锥体内的扩展。数值模拟凸显了这一概念的性能和稳健性。作为量子光学领域的首次应用，我们报告了超亮单光子源的实现。该器件是一种高深宽比 GaAs 光子喇叭，包含一些 InAs 量子点，其第一透镜外部效率为 0.75 +/- 0.1，高斯光束的外部耦合效率高达 0.58 +/- 0.08。 DOI:10.1103/PhysRevLett.110.177402
We introduce the photonic trumpet, a dielectric structure which ensures a nearly perfect coupling between an embedded quantum light source and a Gaussian free-space beam. A photonic trumpet exploits both the broadband spontaneous emission control provided by a single-mode photonic wire and the expansion of this mode within a conical taper. Numerical simulations highlight the performance and robustness of this concept. As a first application in the field of quantum optics, we report the realization of an ultrabright single-photon source. The device, a high aspect ratio GaAs photonic trumpet containing a few InAs quantum dots, demonstrates a first-lens external efficiency of 0.75 +/- 0.1 and an external coupling efficiency to a Gaussian beam as high as 0.58 +/- 0.08. DOI:10.1103/PhysRevLett.110.177402