Friedrich-Alexander-Universität Erlangen-Nürnberg

Whispering Gallery Mode Resonators

Whispering Gallery Mode Resonators

We study nonlinear optical processes in whispering gallery mode (WGM) resonators to explore their quantum-optical aspects. The WGM resonators tend to have very high Q-factors as well as small optical mode volume, which greatly enhance the nonlinear frequency conversion processes. Such processes as e.g. second harmonic generation, parametric down-conversion, and others, then become efficient for very low optical powers [1,2] and enable the generation of non-classical states of light [3].



  1. Fürst et al. Naturally Phase-Matched Second-Harmonic Generation in a Whispering-Gallery-Mode Resonator. Physical Review Letters 104, 153901 (2010).
  2. Fürst et al. Low-Threshold Optical Parametric Oscillations in a Whispering Gallery Mode Resonator. Physical Review Letters 105, 263904 (2010).
  3. Fürst et al. Quantum Light from a Whispering-Gallery-Mode Disk Resonator. Physical Review Letters 106, 113901 (2011).


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