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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 19 — Sep. 12, 2011
  • pp: 17966–17972

Mechanical tuning of whispering gallery modes over a 0.5 THz tuning range with MHz resolution in a silica microsphere at cryogenic temperatures

Khodadad N. Dinyari, Russell J. Barbour, D. Andrew Golter, and Hailin Wang  »View Author Affiliations


Optics Express, Vol. 19, Issue 19, pp. 17966-17972 (2011)
http://dx.doi.org/10.1364/OE.19.017966


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Abstract

We experimentally demonstrate the mechanical tuning of whispering gallery modes in a 40 μm diameter silica microsphere at 10K, over a tuning range of 450 GHz and with a resolution less than 10 MHz. This is achieved by mechanically stretching the stems of a double-stemmed silica microsphere with a commercially available piezo-driven nano-positioner. The large tuning range is made possible by the millimeter long slip-stick motion of the nano-positioner. The ultrafine tuning resolution, corresponding to sub-picometer changes in the sphere diameter, is enabled by the use of relatively long and thin fiber stems, which reduces the effective Poisson ratio of the combined sphere-stem system to approximately 0.0005. The mechanical tuning demonstrated here removes a major obstacle for the use of ultrahigh Q-factor silica microspheres in cavity QED studies of solid state systems and, in particular, cavity QED studies of nitrogen vacancy centers in diamond.

© 2011 OSA

OCIS Codes
(270.5580) Quantum optics : Quantum electrodynamics
(140.3948) Lasers and laser optics : Microcavity devices

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 8, 2011
Revised Manuscript: August 17, 2011
Manuscript Accepted: August 22, 2011
Published: August 29, 2011

Citation
Khodadad N. Dinyari, Russell J. Barbour, D. Andrew Golter, and Hailin Wang, "Mechanical tuning of whispering gallery modes over a 0.5 THz tuning range with MHz resolution in a silica microsphere at cryogenic temperatures," Opt. Express 19, 17966-17972 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-19-17966


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