用于单量子点近红外腔量子电动力学的芯片级光学腔上超低密度胶体硫属铅化物量子点的低温光谱学。

Cryogenic spectroscopy of ultra-low density colloidal lead chalcogenide quantum dots on chip-scale optical cavities towards single quantum dot near-infrared cavity QED.

作者信息

Bose Ranojoy, Gao Jie, McMillan James F, Williams Alex D, Wong Chee Wei

机构信息

Optical Nanostructures Laboratory, Center for Integrated Science and Engineering, Solid-state Science and Engineering, and Mechanical Engineering, Columbia University, New York, NY 10027, USA.

出版信息

Opt Express. 2009 Dec 7;17(25):22474-83. doi: 10.1364/OE.17.022474.

DOI:10.1364/OE.17.022474

PMID:20052171

Abstract

We present evidence of cavity quantum electrodynamics from a sparse density of strongly quantum-confined Pb-chalcogenide nanocrystals (between 1 and 10) approaching single-dot levels on moderately high-Q mesoscopic silicon optical cavities. Operating at important near-infrared (1500-nm) wavelengths, large enhancements are observed from devices and strong modifications of the QD emission are achieved. Saturation spectroscopy of coupled QDs is observed at 77K, highlighting the modified nanocrystal dynamics for quantum information processing.

摘要

我们展示了在适度高Q值的介观硅光学腔上，由稀疏密度（1到10个）的强量子限制铅硫族化物纳米晶体接近单量子点能级所产生的腔量子电动力学证据。这些器件在重要的近红外（1500纳米）波长下工作，观察到了大幅增强，并实现了量子点发射的强烈改变。在77K下观察到了耦合量子点的饱和光谱，突出了用于量子信息处理的纳米晶体动力学的改变。