Photon Emission from a Cavity-Coupled Quantum Dot

非技术摘要激光的使用在现代科学和技术中无处不在，应用范围从光学干涉仪到光盘播放机。这个项目研究耦合到微波腔的量子点的物理。量子点是一种纳米级的设备，可以用来捕获单电子。一个微波腔由两个“镜子”组成，它们可以在相对较长的时间内捕获单个光子。研究小组已经证明，通过单电子流过耦合到腔的量子点来创造一种新型激光是可能的。研究小组正在进行测量，以确定该设备是否可以产生单个微波光子。除了培训研究生和本科生外，首席调查员还将支持一项全面的外联计划。一个“量子设备”网站正在建设中，并将创建新的教程来演示经典力学的基本概念。技术摘要该项目旨在了解耦合到单个微波腔的量子点的动力学。该系统中的单电子隧穿导致光电子发射，由此产生的光场的统计正在研究中。通过将单电子泵入腔耦合的双量子点，研究小组正试图创造一种在微波条件下工作的确定性单光子源。利用一个双量子点作为光子发射体，使用第二个双量子点作为光子探测器，正在研究光子检测方面的问题。这些实验是通过量子点设备和量子限制放大方面的尖端技术进步而实现的。在该计划的高级阶段，研究小组将把多个量子点耦合到一个微波腔中，并寻找集体效应。例如，一个双量子点中的电荷跃迁是否通过腔场耦合到另一个距离约1厘米的量子点？是否有可能观察到光子发射的集体增强，例如Dicke超辐射？除了技术上的努力，研究小组还将开发一种“量子设备维基”，介绍量子设备的基本方面(单电子充电和泡利封锁)。Wiki还支持几个对技术社区有用的模拟包。首席研究人员正在制作简短的经典力学教程，这些教程将发布在互联网上供开放访问。

Non-Technical AbstractThe use of lasers is ubiquitous in modern science and technology, with applications ranging from optical interferometers to compact disk players. This project investigates the physics of quantum dots that are coupled to microwave cavities. Quantum dots are nanoscale devices that can be used to trap single electrons. A microwave cavity consists of two 'mirrors' that trap a single photon of light for a relatively long period of time. The research team has shown that it may possible to create a new type of laser by flowing single electrons through a quantum dot that is coupled to a cavity. The research team is performing measurements to determine if single microwave photons can be generated with the device. In addition to training graduate and undergraduate students, the principal investigator will support a comprehensive outreach program. A 'quantum device' website is being constructed and new tutorials will be created to demonstrate basic concepts in classical mechanics.Technical AbstractThe project aims to understand the dynamics of quantum dots that are coupled to a single microwave cavity. Single electron tunneling in this system results in photoemission and the statistics of the resulting light field is being studied. By pumping single electrons through a cavity coupled double quantum dot, the research team is attempting to create a deterministic single photon source that operates in the microwave regime. Photon detection aspects are being studied, by using one double quantum dot as a photon emitter and a second double quantum dot as a photon detector. The experiments are made possible by cutting-edge technological advances in quantum dot devices and quantum limited amplification. In the advanced phase of the program, the research team will couple multiple quantum dots to a single microwave cavity and search for collective effects. For example, do charge transitions in one double quantum dot couple to another quantum dot that is located ~ 1 cm away via the cavity field? Is it possible to observe collective enhancements in photon emission, such as Dicke superradiance? In addition to the technical effort, the research team will develop a 'Quantum Device Wiki' that introduces the basic aspects of quantum devices (single electron charging and Pauli blockade). The Wiki also supports several simulation packages that will be of use to the technical community. The principal investigator is creating short classical mechanics tutorials that will be posted on the internet for open access.