"Correlations and Photon Statistics in Nanocavity Emitters"

Weng Chow, Technical Staff at Sandia National Laboratories

January 28th (Wednesday), 10:00am
Engineering Science Building (ESB), Room 2001

Nanofabrication advances have reduced size and improved quality of optical cavities, resulting in the realization of nano-dimensioned emitters. Technological motivation for miniaturizing lasers comes from applications where reducing power consumption is a priority. The scientific motivation involves generation of nonclassical light, enabled by a nanocavity operating with one to few quantum dots. Nonclassical light sources, especially single-photon sources, are important to quantum computing and communication.

This talk describes quantum-optical approaches to analyzing nanocavity emission. Two applications of the approaches are discussed. The first concerns the claim of thresholdless lasing, which resulted in much debate over the criteria for lasing and lasing threshold. The second involves single-photon generation and the question regarding the widely used photon correlation, g(2)(0), as an accurate measure of performance. An answer is useful, e.g., when discussing single-photon source versus strongly-attenuated laser beam for quantum-key distribution. The former is the ideal source, while the latter is the presently often-used substitute.

About Weng Chow:

photo of weng chowWeng Chow is a member of technical staff at Sandia National Laboratories, where he works on applying microscopic theory to optoelectronic device development. Some of this work is described in two texts, Semiconductor-Laser Physics and Semiconductor-Laser Fundamentals: Physics of the Gain Materials. He is Fellow of OSA and IEEE, and is recipient of the Department of Energy, Basic Energy Science/Material Science Award, LEOS Distinguished Lecturer Award, Alexander von Humboldt Senior Scientist Award and IEEE Quantum Electronics Award. Sandia National Laboratories, Albuquerque, NM 87185-1086

Hosted by: Professor John Bowers