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Article
Multidisciplinary Sciences
Yang Chen et al.
Summary: Photons with spin angular momentum possess intrinsic chirality, which has a wide range of applications. Current experimental attempts rely on false/extrinsic chirality, but this study has achieved true/intrinsic chiral response using resonant metasurfaces, achieving near-unity circular dichroism and a high quality factor for visible frequencies.
Article
Optics
Jean-Luc Begin et al.
Summary: Chiral interactions are prevalent in nature, and the use of linearly polarized helical light beams as chiral reagents demonstrates efficient chiral sensitivity. Nonlinear absorption of helical light beams offers a new chiroptical detection scheme for both chiral and achiral molecules in liquid phase.
Article
Physics, Multidisciplinary
Zhiling Zhou et al.
Summary: In this study, we demonstrate the concept of extreme chirality based on orbital angular momentum (OAM) helicity modulation, achieved by a mirror-symmetry-broken metasurface. This opens up new possibilities for exploring chirality with unlimited states.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Shunli Liu et al.
Summary: The twisted stereometamaterials proposed in this study can generate OAM-dependent tailorable vortical dichroism ranging from -97% to +98%. By adjusting the geometrical parameters and symmetry of these materials, the spectral characteristics of VD measurements such as sign, magnitude, and position can be flexibly controlled.
LASER & PHOTONICS REVIEWS
(2022)
Article
Physics, Applied
Xiao Li et al.
Summary: In this work, an acoustic metagrating (MG) with perfect retroreflection is realized using an inverse-design scheme, improving upon the limited efficiency of previous designs. The study also highlights the importance of evanescent guided modes in achieving perfect retroreflection, and identifies an orthogonal relationship between the contribution ratios of odd and even guided modes.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
Yangyang Fu et al.
Summary: In this study, a new method for achieving robust asymmetric generation of acoustic vortex field through dual-layer metasurfaces is introduced. This is achieved by controlling the intrinsic topologic charges and the parity of geometry design. The underlying physics is contributed to the one-way process of orbital angular momentum transition ensured by the broken spatial symmetry and the external topologic charge from the vortex diffraction. The novel phenomenon is experimentally demonstrated, providing new routes to manipulate the asymmetric response of vortex fields and potential applications in passive OAM-based diodes.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Tuo Liu et al.
Summary: This study demonstrates the control of acoustic vortex generation by controlling the on-off states of two coherent monopolar sources, achieving switchable OAM without system reconfiguration. It offers new opportunities for chiral sound manipulation and tunable acoustic OAM devices.
Article
Optics
Jeremy R. Rouxel et al.
Summary: Chirality, a structural property of molecules, has significant implications in various fields. A new approach to probe molecular chirality using helical dichroism has been demonstrated on a disordered sample for the first time. By using hard X-rays with spiral Fresnel zone plates, researchers have successfully induced orbital angular momentum (OAM) and obtained helical dichroism spectra of a disordered powder sample, opening up new possibilities for studying the interaction between molecular chirality and OAM of light.
Article
Multidisciplinary Sciences
Tan Shi et al.
Summary: The authors propose a design of planar chiral metasurfaces that exhibit ultrahigh quality factors and near-perfect circular dichroism. They utilize the physics of chiral bound states in the continuum and demonstrate experimentally the chiroptical responses with high quality factors and near-perfect circular dichroism at optical frequencies. The design allows for flexibility in enhancing and tuning the chirality and quality factors of the metasurfaces.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Qing Tong et al.
Summary: Researchers applied the phenomenon of helical dichroism to acoustics and found that a lattice of chiral resonators can induce differential absorption of acoustic vortices. Breaking the rotation symmetry leads to coupling between resonators, resulting in OAM band gaps and non-Hermitian exceptional points that significantly enhance helical dichroism. This discovery has important applications in acoustic OAM manipulations and chiral sound-matter interactions.
Article
Multidisciplinary Sciences
Jincheng Ni et al.
Summary: This study demonstrates an orbital-angular-momentum-assisted approach to generate chiroptical signals with monochromatic light, achieving a gigantic vortical differential scattering on intrinsically chiral microstructures fabricated by femtosecond laser. The VDS measurements can robustly generate chiroptical properties on microstructures with varying geometric features and detect chiral molecules with high sensitivity. This approach paves the way for efficiently chiroptical discrimination of multiscale chiral structures with photonic orbital angular momentum, simplifying and complementing conventional CD spectroscopy for measuring weak optical chirality on mesoscale chiral architectures and macromolecules.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Optics
Xu Ouyang et al.
Summary: Optical multiplexing with orthogonal data channels improves density and security, but nanoscale OAM sensitivity limits its application. Utilizing OAM for nanoscale information multiplexing involves discovering OAM-dependent polarization ellipses and synthetic helical dichroism. This mechanism enables six-dimensional optical information multiplexing with subwavelength-scale focused OAM beams and plasmonic nanoaggregates.
Article
Multidisciplinary Sciences
Shuxiang Gao et al.
Summary: The study introduces a low-profile planar acoustic antenna that achieves far-field spiral airborne sound carrying orbital angular momentum, opening up new possibilities for highly integrated spiral sound emitters.
NATURE COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Yanyan Cao et al.
Summary: This study introduces a metallic cylinder with a phase gradient obtained by engineering the gradient of grooves on its outer surface, demonstrating its ability to manipulate orbital angular momentum (OAM) through structural topological charges and achieve high-efficiency OAM conversion/absorption, while also observing asymmetric response to incident light with opposite OAM helicity.
Article
Physics, Multidisciplinary
Weijin Chen et al.
Summary: Chiral optical effects are typically quantified along specific incident directions or as direction-independent properties by averaging responses among all structure orientations. However, the extremization of chirality with respect to incident directions or structure orientations has not been systematically explored. This study examines chiral responses of open photonic structures using quasinormal modes and polarization singularities, revealing the ideal maximization and minimization of optical chiralities for circular and linear polarizations, respectively, when plane waves are incident in certain directions.
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
Physics, Applied
Zhilin Hou et al.
Summary: In this study, a thin layer of metagratings was used to efficiently change the topological charge of a vortex beam in a waveguide through nonlocal coupling between subunits, resulting in the conversion of plane-wave mode into first-, second-, and third-order vortex beams with nearly perfect efficiency (more than 99%). This breakthrough may open up opportunities for the development of devices for acoustic communication and manipulation.
PHYSICAL REVIEW APPLIED
(2021)
Review
Optics
Kayn A. Forbes et al.
Summary: Optical activity refers to the natural differences in optical responses of chiral materials with opposite handedness, and recent studies have shown that matter may also respond discriminatively to twisted light. This field is rapidly growing with evidence of interactions between chirality and twisted light becoming clearer.
JOURNAL OF PHYSICS-PHOTONICS
(2021)
Article
Multidisciplinary Sciences
Zhifeng Zhang et al.
Article
Physics, Multidisciplinary
Hua-Zhou Chen et al.
Article
Physics, Multidisciplinary
Maxim Gorkunov et al.
PHYSICAL REVIEW LETTERS
(2020)
Review
Optics
Jungho Mun et al.
LIGHT-SCIENCE & APPLICATIONS
(2020)
Article
Multidisciplinary Sciences
Yangyang Fu et al.
Article
Physics, Applied
Yabin Jin et al.
PHYSICAL REVIEW APPLIED
(2019)
Article
Multidisciplinary Sciences
Yangyang Fu et al.
NATURE COMMUNICATIONS
(2019)
Article
Physics, Multidisciplinary
Xu Wang et al.
PHYSICAL REVIEW LETTERS
(2019)
Review
Optics
Yijie Shen et al.
LIGHT-SCIENCE & APPLICATIONS
(2019)
Article
Physics, Applied
Shuting Cao et al.
PHYSICAL REVIEW APPLIED
(2019)
Review
Optics
Liang Feng et al.
Article
Physics, Multidisciplinary
Yong Li et al.
PHYSICAL REVIEW LETTERS
(2017)
Article
Multidisciplinary Sciences
Chengzhi Shi et al.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2017)
Article
Multidisciplinary Sciences
Mario Hentschel et al.
Article
Physics, Multidisciplinary
Xue Jiang et al.
PHYSICAL REVIEW LETTERS
(2016)
Article
Multidisciplinary Sciences
Pei Miao et al.
Article
Nanoscience & Nanotechnology
Liping Ye et al.
Review
Nanoscience & Nanotechnology
Chia Wei Hsu et al.
NATURE REVIEWS MATERIALS
(2016)
Article
Multidisciplinary Sciences
Ward Brullot et al.
Article
Physics, Multidisciplinary
Romain Fleury et al.
PHYSICAL REVIEW LETTERS
(2014)
Article
Chemistry, Multidisciplinary
Ventsislav K. Valev et al.
ADVANCED MATERIALS
(2013)
Article
Multidisciplinary Sciences
Anton Kuzyk et al.
Article
Physics, Multidisciplinary
Christine E. M. Demore et al.
PHYSICAL REVIEW LETTERS
(2012)
Article
Optics
W. Loeffler et al.
Article
Physics, Fluids & Plasmas
Likun Zhang et al.
Article
Multidisciplinary Sciences
Yiqiao Tang et al.
Article
Physics, Multidisciplinary
Y. D. Chong et al.
PHYSICAL REVIEW LETTERS
(2010)
Article
Biochemical Research Methods
Norma J. Greenfield
Review
Chemistry, Multidisciplinary
K Binnemans
