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Scanning probe microscopy of thermally excited mechanical modes of an optical microcavity

Kippenberg, T. J. and Rokhsari, H. and Vahala, K. J. (2006) Scanning probe microscopy of thermally excited mechanical modes of an optical microcavity. . (Submitted)

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The resonant buildup of light within optical microcavities elevates the radiation pressure which mediates coupling of optical modes to the mechanical modes of a microcavity. Above a certain threshold pump power, regenerative mechanical oscillation occurs causing oscillation of certain mechanical eigenmodes. Here, we present a methodology to spatially image the micro-mechanical resonances of a toroid microcavity using a scanning probe technique. The method relies on recording the induced frequency shift of the mechanical eigenmode when in contact with a scanning probe tip. The method is passive in nature and achieves a sensitivity sufficient to spatially resolve the vibrational mode pattern associated with the thermally agitated displacement at room temperature. The recorded mechanical mode patterns are in good qualitative agreement with the theoretical strain fields as obtained by finite element simulations.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Kippenberg, T. J.0000-0002-3408-886X
Vahala, K. J.0000-0003-1783-1380
Additional Information:This research was supported by the DARPA and the Caltech Lee Center for Advanced Networking. TJK gratefully acknowledges receipt of a postdoctoral fellowship from the IST-CPI.
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Caltech Lee Center for Advanced NetworkingUNSPECIFIED
Caltech Center for the Physics of InformationUNSPECIFIED
Classification Code:PACS: 42.65Yj, 42.55-Sa, 42.65-Hw
Record Number:CaltechAUTHORS:20160608-152820655
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:67786
Deposited By: Tony Diaz
Deposited On:09 Jun 2016 00:29
Last Modified:09 Mar 2020 13:19

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