2021
DOI: 10.1021/acsphotonics.0c01941
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Nanoparticle Trapping in a Quasi-BIC System

Abstract: Plasmonic nanotweezers employing metallic nanoantennas provide a powerful tool for trapping nanoscale particles, but the strong heating effect resulting from light absorption limits widespread applications. Here, we propose an alldielectric nanotweezer harnessing quasi-bound states in the continuum (quasi-BICs) to enable the trapping of nanoscale objects with low laser power and a negligible heating effect. The quasi-BIC system provides very high electromagnetic field intensity enhancement that is an order of … Show more

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Cited by 86 publications
(49 citation statements)
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“…Metasurfaces are two-dimensional artificial electromagnetic materials composed of a periodic arrangement of subwavelength optical antennas. The amplitude, phase, and polarization state of electromagnetic waves can be manipulated by designing the size, shape, and symmetry of the optical antennas. The metasurfaces are categorized as homogeneous and gradient metasurfaces by the orders of arrangement of their optical antennas. Metasurfaces have been intensively studied due to their extraordinary optical properties and diverse functionalities, including optical field enhancement, the trapping and tracking of nanoparticles, special beam generation, etc . The optical properties of metasurfaces can be elegantly designed for MNOSs, which has been widely demonstrated with the feasibilities of advanced functionalities and density integrations. We anticipate burgeoning fundamental breakthroughs in MNOSs when multifunctional optical sensing platforms are realized using metasurfaces for light manipulation in subwavelength spatial resolutions.…”
Section: Introductionmentioning
confidence: 99%
“…Metasurfaces are two-dimensional artificial electromagnetic materials composed of a periodic arrangement of subwavelength optical antennas. The amplitude, phase, and polarization state of electromagnetic waves can be manipulated by designing the size, shape, and symmetry of the optical antennas. The metasurfaces are categorized as homogeneous and gradient metasurfaces by the orders of arrangement of their optical antennas. Metasurfaces have been intensively studied due to their extraordinary optical properties and diverse functionalities, including optical field enhancement, the trapping and tracking of nanoparticles, special beam generation, etc . The optical properties of metasurfaces can be elegantly designed for MNOSs, which has been widely demonstrated with the feasibilities of advanced functionalities and density integrations. We anticipate burgeoning fundamental breakthroughs in MNOSs when multifunctional optical sensing platforms are realized using metasurfaces for light manipulation in subwavelength spatial resolutions.…”
Section: Introductionmentioning
confidence: 99%
“…Special attention has been paid to localized surface plasmon resonances (LSPRs) in metallic nanostructures, 2,[4][5][6] multipolar Mie modes in high refractive index dielectric microstructures, 1,7,8 multipolar resonances in epsilon-near-zero (ENZ) media, 9,10 Fano resonances in plasmonic nanostructures, [11][12][13] anapole states in well-designed structures, [14][15][16] and even more exotic electromagnetic excitations, such as topologically protected edge states 17,18 and bound states in the continuum (BIC). 10,19 Also worth mentioning is a nonreciprocal semi-transparent isolator based on the magneto-optical Weyl semimetal EuCd 2 As 2 , recently created by Park et al, 20 which enables full absorption of the incident irradiation with zero backward scattering. On the one hand, the increased LDOS removes the fundamental limitation imposed on light-to-heat conversion in nanostructures, on the other hand, fine tuning of the resonances itself represents a rather delicate task, since a high-finesse design of resonators and cavities is necessarily required.…”
Section: Introductionmentioning
confidence: 99%
“…There are also other emerging manipulation platforms such as metasurfaces and metamaterials, which will be outlined later. As a summary of this section, we list concisely the main technical parameters of the representative platforms/works (Table ), such as particle size, material, trap stiffness, heating, etc.…”
Section: Fundamentals Of Optical Forces and Auxiliary Forces In Vario...mentioning
confidence: 99%
“…There are many other degrees of freedom to engineer light beams by designing functional metasurface and two-dimensional materials. They all can provide powerful handles or abilities for optical manipulation. , Therefore, we believe that the metasurface/two-dimensional material will be an important nanophotonic platform for future optical manipulations …”
Section: Outlook and Conclusionmentioning
confidence: 99%