Volume 116, Number 2, October 2016
|Number of page(s)||7|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||02 December 2016|
Tunable Fano resonant optical forces exerted on a graphene-coated dielectric particle by a Gaussian evanescent wave
Key Laboratory of Micro-Nano Measurement, Manipulation and Physics (Ministry of Education), School of Physics and Nuclear Energy Engineering, Beihang University - Beijing 100191, China
Received: 12 September 2016
Accepted: 14 November 2016
In this paper, we investigate the optical forces exerted on a graphene-coated dielectric particle by the Gaussian beam transmitted through the prism setup systematically. It is shown that the optical force spectra exhibit significant Fano resonance under the excitation of a Gaussian evanescent wave. The magnitude and morphology of Fano resonance can be modulated effectively by the graphene coating. Also, the modification on the threshold of the Fermi energy of graphene could help to regulate the trapping behavior efficiently. The proposed work may provide a new avenue in the specific optical tweezers and nano-optics.
PACS: 42.50.Wk – Mechanical effects of light on material media, microstructures and particles / 87.80.Cc – Optical trapping / 42.65.Jx – Beam trapping, self-focusing and defocusing; self-phase modulation
© EPLA, 2016
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