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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Tunable whispering gallery modes for spectroscopy and CQED experiments

Focus on Microlaser and Cavity QED

Wolf von Klitzing1,3, Romain Long1, Vladimir S Ilchenko2, Jean Hare1 and Valérie Lefèvre-Seguin1

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Part of Focus on Microlaser and Cavity QED

We have tuned the whispering gallery modes of a fused silica micro-resonator over nearly 1 nm at 800 nm, i.e. over half of a free spectral range or the equivalent of 106 linewidths of the resonator. This has been achieved by a new method based on the stretching of a two-stem microsphere. The devices described below will permit new cavity-QED experiments with this ultra high finesse optical resonator when it is desirable to optimize its coupling to emitters with given transition frequencies. The tuning capability demonstrated is compatible with both UHV and low temperature operation, which should be useful for future experiments with laser cooled atoms or single quantum dots. A general overview of the current state of the art in microspheres is given as well as a more general introduction.


PACS

42.50.Pq Cavity quantum electrodynamics; micromasers

37.10.Vz Mechanical effects of light on atoms, molecules, and ions

42.79.-e Optical elements, devices, and systems

Subjects

Atomic and molecular physics

Optics, quantum optics and lasers

Dates

Issue 1 (August 2001)

Received 30 November 2000

Published 3 August 2001



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