Quantum Light from a Whispering-Gallery-Mode Disk Resonator

J. U. Fürst, D. V. Strekalov, D. Elser, A. Aiello, Ulrik Lund Andersen, Ch. Marquardt, G. Leuchs

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Abstract

Optical parametric down-conversion has proven to be a valuable source of nonclassical light. The process is inherently able to produce twin-beam correlations along with individual intensity squeezing of either parametric beam, when pumped far above threshold. Here, we present for the first time the direct observation of intensity squeezing of -1.2 dB of each of the individual parametric beams in parametric down-conversion by use of a high quality whispering-gallery-mode disk resonator. In addition, we observed twin-beam quantum correlations of -2.7 dB with this cavity. Such resonators feature strong optical confinement and offer tunable coupling to an external optical field. This work exemplifies the potential of crystalline whispering-gallery-mode resonators for the generation of quantum light. The simplicity of this device makes the application of quantum light in various fields highly feasible.
Original languageEnglish
JournalPhysical Review Letters
Volume106
Issue number11
Pages (from-to)-
ISSN0031-9007
DOIs
Publication statusPublished - 2011

Bibliographical note

Copyright 2011 American Physical Society

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