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

Yang, Yang; Li, Jiafang; Li, Zhiyuan

doi:10.1364/prj.4.000065

Cited by 35 publications

(14 citation statements)

References 36 publications

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“…For instance, owing to the strong field enhancement of graphene plasmons, Zhu et al [65] investigated the optical force, which was more than one order of magnitude larger than silver nanowire pairs, in the slot region of the GCNW dimer. Yang et al [131] studied the optical forces exerted on a graphene-coated dielectric particle by a focused Gaussian beam.…”

Section: Other Applicationsmentioning

confidence: 99%

Graphene-Coated Nanowire Waveguides and Their Applications

Teng

Wang

2020

Nanomaterials

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In recent years, graphene-coated nanowires (GCNWs) have attracted considerable research interest due to the unprecedented optical properties of graphene in terahertz (THz) and mid-infrared bands. Graphene plasmons in GCNWs have become an attractive platform for nanoscale applications in subwavelength waveguides, polarizers, modulators, nonlinear devices, etc. Here, we provide a comprehensive overview of the surface conductivity of graphene, GCNW-based plasmon waveguides, and applications of GCNWs in optical devices, nonlinear optics, and other intriguing fields. In terms of nonlinear optical properties, the focus is on saturable absorption. We also discuss some limitations of the GCNWs. It is believed that the research of GCNWs in the field of nanophotonics will continue to deepen, thus laying a solid foundation for its practical application.

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Section: Other Applicationsmentioning

confidence: 99%

Graphene-Coated Nanowire Waveguides and Their Applications

Teng

Wang

2020

Nanomaterials

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“…On the other hand, the optical and physical properties of the intended particle play an effective role in optical trap enhancement [28][29][30] . For instance, using hollow gold and silver nanoparticles as handles in the OTs experience stronger optical forces 31 , the effect of resonant mode interference on trapping of gold core-silicon shell nanoparticles have been investigated 32 , optical forces exerted on graphene-coated dielectric particle under the illumination of an arbitrary optical beam have been investigated, theoretically 33 , and plasmonic effects of gold-coated black silicon have shown enhancement of the efficiency of OTs 34 .…”

Section: Introductionmentioning

confidence: 99%

Optimized anti-reflection core-shell microspheres for enhanced optical trapping by structured light beams

Shahabadi

Madadi

Abdollahpour

2020

Preprint

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In this paper, we study the optical trapping of anti-reflection core-shell microspheres by regular Gaussian beam and several structured beams including radially polarized Gaussian, petal, and hard-aperture-truncated circular Airy beams. We show that using an appropriate anti-reflection core-shell microsphere for the optical trapping by several structured light beams can dramatically enhance the strength of the trap compared to the trapping by the common Gaussian beam. The optimal core-shell thickness ratio that minimizes the scattering force is obtained for polystyrene-silica and anatase-amorphous titania microspheres, such that the core-shells act as anti-reflection coated microspheres. We show that the trapping strength of the anti-reflection coated microparticles trapped by the common Gaussian beam is enhanced up to 2-folds compared to that of trapped uncoated microparticles, while the trapping of anti-reflection coated microparticles, by the radially polarized beam, is strengthened up to 4-folds in comparison to that of the trapped uncoated microparticles by the Gaussian beam. Our results indicate that for anatase-amorphous titania microparticles highest trap strength is obtained by radially polarized beam, while for the polystyrene-silica microparticles, the strongest trapping is achieved by the petal beam.

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“…[18][19][20][21][22][23] The enhancement of the funda-mental wave and second harmonic wave has been observed in metallic structures and nanostructured metal or graphene. [24][25][26][27][28][29][30][31][32][33][34] Experiments and theories have shown that linear transmission through arrays is sensitive to many factors such as array periodicity, hole shape and size, incidence angle, and film thickness. For instance, the experimental observations of the SHG signal have also been reported.…”

Section: Introductionmentioning

confidence: 99%

Lifetime and nonlinearity of modulated surface plasmon for black phosphorus sensing application

et al. 2018

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Black phosphorus surface plasmon (BPSP) is a new promising candidate material for electromagnetic field confinement at the subwavelength scale. Here, we theoretically investigated the light confinement, second-order nonlinearity and lifetimes of tunable surface plasmons in nanostructured black phosphorus nanoflakes with superstrates. The grating structure can enhance the local optical field of the fundamental wave (FW) and second harmonic wave (SHW) due to the surface plasmon resonance. Based on the coupled mode theory (CMT), a theoretical model for the nanostructured black phosphorus was established to study the spectrum features of FW. The lifetimes of the plasmonic resonant modes were investigated with the finite difference time domain (FDTD) simulations and CMT. Since the permittivity of black phosphorus depends on its Fermi energy and electron scattering rate, the lifetimes of plasmonic absorption modes are tunable with both the Fermi energy and scattering rate. The intensity, wavelengths and spectral width of BPSP resonance modes and their lifetimes can be precisely controlled with the Fermi energy, scattering rate, side length and refractive index of the superstrate. The sensitivity is described by varying the refractive index of the superstrate such as an aqueous solution. We have introduced a secondorder nonlinear source to investigate the SHW of nanostructured black phosphorus. This paper presents the corner/edge energy distribution and the tunable lifetime of BPSP as well as their unprecedented capability of photon manipulation for second-order nonlinearity within the deep subwavelength scale. The configuration and method are useful for research of the absorption, lifetime of light and nonlinear optical processes in black phosphorus-based optoelectronic devices, especially the modulation and sensing applications.

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

Cited by 35 publications

References 36 publications

Graphene-Coated Nanowire Waveguides and Their Applications

Graphene-Coated Nanowire Waveguides and Their Applications

Optimized anti-reflection core-shell microspheres for enhanced optical trapping by structured light beams

Lifetime and nonlinearity of modulated surface plasmon for black phosphorus sensing application

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