Observation of Backaction and Self-Induced Trapping in a Planar Hollow Photonic Crystal Cavity

The optomechanical coupling between a resonant optical field and a nanoparticle through trapping forces is demonstrated. Resonant optical trapping, when achieved in a hollow photonic crystal cavity is accompanied by cavity backaction effects that result from two mechanisms. First, the effect of the particle on the resonant field is measured as a shift in the cavity eigenfrequency. Second, the effect of the resonant field on the particle is shown as a wavelength-dependent trapping strength. The existence of two distinct trapping regimes, intrinsically particle specific, is also revealed. Long optical trapping (> 10 min) of 500 nm dielectric particles is achieved with very low intracavity powers (< 120 mu W). DOI: 10.1103/PhysRevLett.110.123601


Published in:
Physical Review Letters, 110, 12
Year:
2013
Publisher:
College Pk, American Physical Society
ISSN:
0031-9007
Laboratories:




 Record created 2013-05-13, last modified 2018-03-18

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Phys. Rev. Lett. 110 123601 (2013) - Download fulltextPDF
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