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
Descharmes_Supplementary_Movie.mov
Publisher's version
openaccess
14.46 MB
Video Quicktime
e4d2dd3ffb04514db62506c4ff05d044
Descharmes_Supplementary_info.pdf
Publisher's version
openaccess
156.71 KB
Adobe PDF
c3bf67ccd246ea87f70532653f36a614