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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Observation of two-color ghost imaging

Sanjit Karmakar, Yanhua H. Shih

Published Apr 2, 2010• 7 citations
Publisher

Abstract

Two-photon quantum imaging has so far demonstrated two peculiar features: (1) reproducing nonlocal images in "ghost" imaging type experiments and (2) improving imaging spatial resolution beyond the classical limit in quantum lithography type measurements. This article reports an experimental study on non-degenerate, two-color, biphoton ghost imaging which reproduced a nonlocal ghost image and simultaneously enhanced the angular resolving power of imaging by means of a greater field of view or by means of a greater imaging amplification compared with that of classical imaging.

DOI
10.1117/12.851188

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One of the most surprising consequences of quantum mechanics is the entanglement of two or more distant particles. Although questions regarding fundamental issues of quantum theory still exist, quantum entanglement has started to play important roles in practical engineering applications. Quantum imaging is one of these exciting areas. Quantum imaging has demonstrated two peculiar features: (1) reproducing "ghost" images in a "nonlocal" manner, and (2) enhancing the spatial resolution of imaging beyond the diffraction limit. In this article, we start with the review of classical imaging to establish the basic concepts and formalisms of imaging. We then analyze two-photon imaging with particular emphasis on the physics of spatial resolution enhancement and the "ghost" imaging phenomenon.