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Multidisciplinary Sciences
Zihao Chen et al.
Summary: This study presents a compound method that combines lateral mirrors and bound states in the continuum to achieve on-chip optical cavities with high quality factors and small modal volumes. Unlike traditional methods, this approach enables light trapping in all three dimensions and demonstrates high quality factors and low modal volumes.
Article
Multidisciplinary Sciences
Haoye Qin et al.
Summary: Polarization singularities and topological vortices are observed in photonic crystal slabs centered at bound states in the continuum (BICs), which can be attributed to zero amplitude of polarization vectors. Optical forces around BICs exhibit similar topological features, with force vectors winding in the momentum space. These topological forces can be used to trap and repel nanoparticles, providing opportunities for manipulating nanoparticles and fluid flow.
Article
Physics, Multidisciplinary
Lei Huang et al.
Summary: This study combines the concept of moire structures in twisted bilayer photonic crystal slabs with the notion of bound states in the continuum (BICs) to create a new optical state, referred to as moire quasi-BIC. It demonstrates that this state possesses characteristics of moire flat bands and quasi-BICs. The research also explores the mechanism behind the formation of moire flat bands and shows that decreasing the twist angle can lead to a near-perfect BIC with significantly reduced radiation loss. Additionally, it highlights the advantage of moire quasi-BICs in enhancing second-harmonic generation (SHG) compared to dispersive quasi-BICs.
PHYSICAL REVIEW LETTERS
(2022)
Review
Physics, Applied
Yuzhi Shi et al.
Summary: Optical tweezers are important manipulation tools used in various fields of physics. This review explores recent advances in optical manipulation using metamaterials, which offer unprecedented control of light. The study also discusses the potential for future developments in this emerging field.
APPLIED PHYSICS REVIEWS
(2022)
Review
Physics, Applied
Yang Chen et al.
Summary: Nanoscopic chiroptics studies spin-dependent asymmetric light-matter interactions at the nanoscale, with asymmetry stemming from intrinsic properties of materials, structures, or light. With the advent of low-dimensional materials platforms, nanoscopic chiroptics has expanded from far field to near field, and across spatial, momentum, and integrated spatial-momentum dimensions, revealing new physical mechanisms and applications related to chiral effects.
NATURE REVIEWS PHYSICS
(2022)
Article
Physics, Multidisciplinary
Timo Stolt et al.
Summary: This study demonstrates phase-matched second-harmonic generation (SHG) from three-dimensional metamaterials consisting of stacked metasurfaces. By utilizing phase engineering of metasurfaces at interacting wavelengths, they achieved phase-matched SHG in the unconventional backward direction, with SHG signal scaling superlinearly with the number of layers. Their results inspire further research to achieve higher conversion efficiencies and address more complex wave fronts.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Yixuan Zeng et al.
Summary: The study uncovers polarization singularities in momentum space, revealing topological features in photonic crystal slabs such as vortex eigenpolarization singularities and circular polarization points. It explores the processes of asymmetric generation and annihilation of C points, as well as topological phenomena related to radiative lifetimes.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Adam Overvig et al.
Summary: The study introduces quasi-bound states in the continuum (QBICs) born of chiral perturbations, encoding arbitrary elliptical polarization states and enabling geometric phase engineering. Metasurfaces with ultrasharp spectral features are designed as a result, shaping impinging wave fronts with near-unity efficiency. The findings extend Fano resonances beyond their conventional limits, opening opportunities for nanophotonics, classical and quantum optics, and acoustics.
PHYSICAL REVIEW LETTERS
(2021)
Review
Nanoscience & Nanotechnology
Wenzhe Liu et al.
Summary: This paper reviews recent research on the generation and observation of polarization singularities in metaphotonics, including discussions on polarization singularities in Mie theory, various photonic-crystal structures, and conversions from polarization to phase singularities. The authors suggest that polarization singularities can provide novel perspectives for light-matter manipulation.
Article
Physics, Multidisciplinary
Jefferson Dixon et al.
Summary: By utilizing high-Q dielectric metasurfaces with intrinsic chirality, a single device that functions both as a light source and an optical isolator has been developed. Through careful manipulation of the geometry of constituent silicon metaatoms, three-dimensionally chiral modes were designed to act as optical spin-dependent filters. This design presents a new approach towards compactly isolating integrated light sources by directly tailoring the emission properties of the light source itself.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Guangwei Hu et al.
Summary: By twisting and stacking suitably tailored nanostructures, emerging photonic responses can be achieved, altering light dispersion, and manipulating classical and quantum light effects at the nanoscale.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Physics, Multidisciplinary
Zhiyuan Che et al.
Summary: This study reports the observation of polarization singularities in the momentum space of 2D photonic quasicrystal slabs, uncovering the relationship between the topological charges of these singularities and the symmetry of the photonic quasicrystal slabs. It confirms that these singularities are protected by the point-group symmetry of the photonic quasicrystal slab and correspond to quasi-bound states with high-quality factors in the continuum. Additionally, polarization singularities of different topological charges are experimentally verified, introducing core concepts of optical singularities into quasiperiodic systems.
PHYSICAL REVIEW LETTERS
(2021)
Article
Multidisciplinary Sciences
Qinghua Song et al.
Summary: By exploiting the topological features of non-Hermitian matrices near singular points, an additional degree of freedom was introduced to address optical phase engineering in optical metasurfaces. Choosing metasurface building blocks to encircle a singularity allowed for the engineered full 2π-phase on a specific reflected polarization channel with topological protection. The ease of implementation and compatibility with other phase-addressing mechanisms demonstrate the industrial applicability of topological properties in metasurface technology at optical frequencies.
Article
Materials Science, Multidisciplinary
Maxim V. Gorkunov et al.
Summary: The study shows that metasurfaces without mirror symmetry can exhibit chiral electromagnetic response, outperforming rotationally symmetric counterparts to achieve near-lossless maximum chirality. By employing high-quality-factor resonances and a special type of BICs, the coupling of light with resonant metasurfaces can be engineered to achieve maximum chirality. Proof-of-concept experimental results confirm the prediction of maximum chiral response of the BIC-empowered asymmetric resonant dielectric metasurfaces.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Multidisciplinary Sciences
Q. Song et al.
Summary: Any arbitrary state of polarization of light beam can be decomposed into two orthogonal oscillations, each with a specific amplitude of the electric field. The dispersive nature of diffractive and refractive optical components affects these amplitudes over a small wavelength range, altering the properties of light polarization. Recent research suggests the possibility of broadband nanophotonic interfaces to mitigate frequency dispersion, but achieving arbitrary polarization control still presents challenges.
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Multidisciplinary Sciences
Can Huang et al.
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Multidisciplinary Sciences
Xuefan Yin et al.
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Weimin Ye et al.
PHYSICAL REVIEW LETTERS
(2020)
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Bo Wang et al.
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(2020)
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Maxim Gorkunov et al.
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(2020)
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Katsuya Tanaka et al.
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Adam C. Overvig et al.
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Wenzhe Liu et al.
PHYSICAL REVIEW LETTERS
(2019)
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Multidisciplinary Sciences
Jicheng Jin et al.
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Ang Chen et al.
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Hugo M. Doeleman et al.
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Yiwen Zhang et al.
PHYSICAL REVIEW LETTERS
(2018)
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Eileen Otte et al.
LIGHT-SCIENCE & APPLICATIONS
(2018)
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Ashok Kodigala et al.
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Evgeny N. Bulgakov et al.
PHYSICAL REVIEW LETTERS
(2017)
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Yu Guo et al.
PHYSICAL REVIEW LETTERS
(2017)
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Yang Zhao et al.
NATURE COMMUNICATIONS
(2017)
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Chia Wei Hsu et al.
NATURE REVIEWS MATERIALS
(2016)
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Vincenzo D'Ambrosio et al.
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Giovanni Milione et al.
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Yi Yang et al.
PHYSICAL REVIEW LETTERS
(2014)
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Bo Zhen et al.
PHYSICAL REVIEW LETTERS
(2014)
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Chia Wei Hsu et al.
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Y. Zhao et al.
NATURE COMMUNICATIONS
(2012)
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Giovanni Milione et al.
PHYSICAL REVIEW LETTERS
(2011)
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SH Fan et al.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2003)
