Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Frontiers in Optics

Developing Whispering Gallery Mode Resonators for Quantum Optics Applications

Matthew T. Simons, Eugeniy E. Mikhailov, Irina V. Novikova

Published Jan 1, 2010• 0 citations
Publisher

Abstract

We have achieved non-critically phase-matched frequency conversion at 1064 nm in a polished LiNbO3 whispering gallery mode resonator disk. This is the first step towards a low-threshold, narrow-band non-classical light source.
DOI
10.1364/fio.2010.ftha7

Related papers

Quantum Light from a Whispering-Gallery-Mode Disk Resonator

Josef Urban Fürst, Dmitry Strekalov, Dominique Elser +4 more

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.

arXiv:1008.0594•Physical Review Letters•Mar 15, 2011•172 citations

Naturally Phase-Matched Second-Harmonic Generation in a Whispering-Gallery-Mode Resonator

Josef Urban Fürst, Dmitry Strekalov, Dominique Elser +4 more

We demonstrate for the first time natural phase matching for optical frequency doubling in a high-Q whispering-gallery-mode resonator made of lithium niobate. A conversion efficiency of 9% is achieved at 30 microW in-coupled continuous wave pump power. The observed saturation pump power of 3.2 mW is almost 2 orders of magnitude lower than the state-of-the-art value. This suggests an application of our frequency doubler as a source of nonclassical light requiring only a low-power pump, which easily can be quantum noise limited. Our theoretical analysis of the three-wave mixing in a whispering-gallery-mode resonator provides the relative conversion efficiencies for frequency doubling in various modes.

arXiv:0912.3864•Physical Review Letters•Apr 12, 2010•281 citations

Continuously adjustable narrow-band heralded single photon source

Michael J. Foertsch, Josef Fuerst, Christoffer Wittmann +5 more

We present the high efficient generation of narrow-band heralded single photons, widely tunable in wavelength and bandwidth using resonator enhanced spontaneous down conversion in a crystalline whispering gallery mode resonator.

Conference on Lasers and Electro-Optics•Jan 1, 2012•0 citations

Non-classical light generated in a Whispering Gallery Mode Parametric Oscillator

Michael Förtsch, Gerhard Schunk, Josef Urban Fürst +5 more

We present the generation of quantum correlated twin beams in a whispering gallery mode resonator made from lithium niobate and the first direct observation of amplitude squeezing for the single parametric beams.

•Jan 1, 2011•0 citations

Non-classical light generated in a whispering gallery mode parametric oscillator

Michael Förtsch, Gerhard Schunk, Josef Urban Fürst +5 more

We present the generation of quantum correlated twin beams in a whispering gallery mode resonator made from lithium niobate and the first direct observation of amplitude squeezing for the single parametric beams.

•Aug 1, 2011•0 citations

Photon-pair generation in silica microbubble resonators

Ross Challinor, Peter J. Mosley

We present progress towards silica microbubble whispering gallery mode resonators as viable sources of high-quality, narrow-band single photon pairs at widely- separated wavelengths through spontaneous four-wave mixing.

Conference on Lasers and Electro-Optics•Jan 1, 2021•0 citations
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.
We demonstrate for the first time natural phase matching for optical frequency doubling in a high-Q whispering-gallery-mode resonator made of lithium niobate. A conversion efficiency of 9% is achieved at 30 microW in-coupled continuous wave pump power. The observed saturation pump power of 3.2 mW is almost 2 orders of magnitude lower than the state-of-the-art value. This suggests an application of our frequency doubler as a source of nonclassical light requiring only a low-power pump, which easily can be quantum noise limited. Our theoretical analysis of the three-wave mixing in a whispering-gallery-mode resonator provides the relative conversion efficiencies for frequency doubling in various modes.