Optical forces exerted on a graphene-coated dielectric particle by a focused Gaussian beam

Yang Yang; Zhe Shi; Jiafang Li; Zhi-Yuan Li

doi:doi:10.1364/prj.4.000065

Photonics Research, 2016, 4 (2): 02000065, Published Online: Sep. 28, 2016

Optical forces exerted on a graphene-coated dielectric particle by a focused Gaussian beam Download： 960次

Yang Yang ^1,2Zhe Shi ¹Jiafang Li ^1,*Zhi-Yuan Li ¹

Author Affiliations

¹ Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijng 100190, China

² Key Laboratory of Micro-Nano Measurement-Manipulation and Physics (Ministry of Education), Beihang University, Beijing 100191, China

Figures & Tables

Fig. 1. Focused Gaussian beam with waist radius w0 is incident upon a graphene-coated polystyrene spherical particle with radius R.

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Fig. 2. Vertical optical force Fz exerted on a graphene-coated polystyrene particle by a focused Gaussian beam as a function of wavelength with different (a) particle radius and (b) Fermi energy. (c) and (d) plot the resonant wavelength as a function of particle radius and Fermi energy, respectively.

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Fig. 3. Optical forces as a function of the displacement of beam center along the x axis on a graphene-coated polystyrene particle with radius R=50 nm at resonant excitation wavelength λ=5151 nm: (a) horizontal direction Fx and (b) vertical direction Fz with different Fermi energy impactions. Inset: Optical force Fz with Fermi energy Ef=0.6 eV.

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Fig. 4. Vertical forces Fz as a function of the displacement of beam center along the z axis with different Fermi energy of the graphene coating. λ=5151 nm, R=50 nm.

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Fig. 5. Optical force as a function of the particle radius: (a) polystyrene particle; (b) graphene-coated polystyrene particle; (c) empty graphene particle.

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Fig. 6. WGM of electric field patterns of: (a), (d) polystyrene particle, (b), (e) graphene-coated polystyrene particle, (c), (f) bare graphene shell, at resonance of (a)–(c) electric field multipoles a12 and (d)–(f) magnetic multipoles b12, respectively.

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Yang Yang, Zhe Shi, Jiafang Li, Zhi-Yuan Li. Optical forces exerted on a graphene-coated dielectric particle by a focused Gaussian beam[J]. Photonics Research, 2016, 4(2): 02000065.

Optical forces exerted on a graphene-coated dielectric particle by a focused Gaussian beam Download： 960次

Fig. 1. Focused Gaussian beam with waist radius w0 is incident upon a graphene-coated polystyrene spherical particle with radius R.

Fig. 4. Vertical forces Fz as a function of the displacement of beam center along the z axis with different Fermi energy of the graphene coating. λ=5151 nm, R=50 nm.

Fig. 5. Optical force as a function of the particle radius: (a) polystyrene particle; (b) graphene-coated polystyrene particle; (c) empty graphene particle.

Fig. 6. WGM of electric field patterns of: (a), (d) polystyrene particle, (b), (e) graphene-coated polystyrene particle, (c), (f) bare graphene shell, at resonance of (a)–(c) electric field multipoles a12 and (d)–(f) magnetic multipoles b12, respectively.

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Optical forces exerted on a graphene-coated dielectric particle by a focused Gaussian beam Download： 960次

Fig. 1. Focused Gaussian beam with waist radius w0 is incident upon a graphene-coated polystyrene spherical particle with radius R.

Fig. 4. Vertical forces Fz as a function of the displacement of beam center along the z axis with different Fermi energy of the graphene coating. λ=5151 nm, R=50 nm.

Fig. 5. Optical force as a function of the particle radius: (a) polystyrene particle; (b) graphene-coated polystyrene particle; (c) empty graphene particle.

Fig. 6. WGM of electric field patterns of: (a), (d) polystyrene particle, (b), (e) graphene-coated polystyrene particle, (c), (f) bare graphene shell, at resonance of (a)–(c) electric field multipoles a12 and (d)–(f) magnetic multipoles b12, respectively.

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