Analog Optical Spatial Differentiators Based on Dielectric Metasurfaces
Sign Up to like & getrecommendations! Published in 2019 at "Advanced Optical Materials"
DOI: 10.1002/adom.201901523
Abstract: Analog spatial differentiator is an important optical computational device that can be potentially used in the field of high‐speed edge detection and optical image processing. In the current stage, a general method is still required… read more here.
Keywords: spatial differentiators; differentiators based; analog optical; based dielectric ... See more keywords
Nonlinear Wavefront Control by Geometric‐Phase Dielectric Metasurfaces: Influence of Mode Field and Rotational Symmetry
Sign Up to like & getrecommendations! Published in 2020 at "Advanced Optical Materials"
DOI: 10.1002/adom.201902050
Abstract: Nonlinear Pancharatnam–Berry phase metasurfaces facilitate the nontrivial phase modulation for frequency conversion processes by leveraging photon‐spin dependent nonlinear geometric‐phases. However, plasmonic metasurfaces show some severe limitation for nonlinear frequency conversion due to the intrinsic high… read more here.
Keywords: phase; field; geometric phases; nonlinear geometric ... See more keywords
Bifunctional Manipulation of Terahertz Waves with High‐Efficiency Transmissive Dielectric Metasurfaces
Sign Up to like & getrecommendations! Published in 2022 at "Advanced Science"
DOI: 10.1002/advs.202205499
Abstract: Multifunctional terahertz (THz) devices in transmission mode are highly desired in integration‐optics applications, but conventional devices are bulky in size and inefficient. While ultra‐thin multifunctional THz devices are recently demonstrated based on reflective metasurfaces, their… read more here.
Keywords: thz devices; high efficiency; dielectric metasurfaces; terahertz ... See more keywords
Nonlinear imaging with all-dielectric metasurfaces.
Sign Up to like & getrecommendations! Published in 2020 at "Nano letters"
DOI: 10.1021/acs.nanolett.0c01105
Abstract: Nonlinear metasurfaces incorporate many of the functionalities of their linear counterparts such as wavefront shaping but simultaneously they perform nonlinear optical transformations. This dual functionality leads to a rather unintuitive physical behavior which is still… read more here.
Keywords: imaging dielectric; nonlinear imaging; dielectric metasurfaces;
High-Index Dielectric Metasurfaces Performing Mathematical Operations
Sign Up to like & getrecommendations! Published in 2019 at "Nano Letters"
DOI: 10.1021/acs.nanolett.9b02477
Abstract: Image processing and edge detection are at the core of several newly emerging technologies, such as augmented reality, autonomous driving, and more generally object recognition. Image processing is typically performed digitally using integrated electronic circuits… read more here.
Keywords: edge detection; image; geometry; index dielectric ... See more keywords
Fast Topology Optimization for Near-Field Focusing All-Dielectric Metasurfaces Using the Discrete Dipole Approximation.
Sign Up to like & getrecommendations! Published in 2022 at "ACS nano"
DOI: 10.1021/acsnano.2c07848
Abstract: Using an efficient implementation of the discrete dipole approximation and topology optimization, we design all-dielectric metasurfaces capable of focusing light into intense deep subwavelength hotspots. The light focusing of these metasurfaces far outweighs conventional lenses… read more here.
Keywords: topology; topology optimization; dipole approximation; dielectric metasurfaces ... See more keywords
Fabry-Pérot Cavity Formed with Dielectric Metasurfaces in a Hollow-Core Fiber
Sign Up to like & getrecommendations! Published in 2017 at "ACS Photonics"
DOI: 10.1021/acsphotonics.7b01154
Abstract: We demonstrate a fiber-integrated Fabry-Perot cavity formed by attaching a pair of dielectric metasurfaces to the ends of a hollow-core photonic-crystal fiber segment. The metasurfaces consist of perforated membranes designed as photonic-crystal slabs that act… read more here.
Keywords: hollow core; cavity formed; fiber; dielectric metasurfaces ... See more keywords
Rochon-Prism-Like Planar Circularly Polarized Beam Splitters Based on Dielectric Metasurfaces
Sign Up to like & getrecommendations! Published in 2017 at "ACS Photonics"
DOI: 10.1021/acsphotonics.7b01191
Abstract: We design and fabricate the Rochon-prism-like planar circularly polarized beam splitters based on dielectric metasurfaces by simultaneously controlling the geometric phase and the propagation phase via manipulation of the orientations and the sizes of the… read more here.
Keywords: based dielectric; prism like; dielectric metasurfaces; rochon prism ... See more keywords
Modulation of spin-dependent diffraction based on dielectric metasurfaces
Sign Up to like & getrecommendations! Published in 2020 at "Scientific Reports"
DOI: 10.1038/s41598-020-64943-z
Abstract: We propose theoretically and realize experimentally a tunable single-slit diffraction based on dielectric metasurfaces. Our dielectric metasurfaces can be regarded as polarization converters to generate inhomogeneous polarized light periodically variant in x direction. Different from… read more here.
Keywords: based dielectric; spin dependent; diffraction based; diffraction ... See more keywords
High-Q refractive index sensors based on all-dielectric metasurfaces
Sign Up to like & getrecommendations! Published in 2022 at "RSC Advances"
DOI: 10.1039/d2ra02176e
Abstract: Possessing fantastic abilities to freely manipulate electromagnetic waves on an ultrathin platform, metasurfaces have aroused intense interest in the academic circle. In this work, we present a high-sensitivity refractive index sensor excited by the guided… read more here.
Keywords: high refractive; dielectric metasurfaces; refractive index; index sensors ... See more keywords
Birefringent optical retarders from laser 3D-printed dielectric metasurfaces
Sign Up to like & getrecommendations! Published in 2021 at "Applied Physics Letters"
DOI: 10.1063/5.0046978
Abstract: Structuring light attracts continuous research effort due to its impactful applications in optical information and communications, laser material processing, optical imaging, or optical manipulation of matter. In particular, femtosecond laser direct writing of photoresists is… read more here.
Keywords: printed dielectric; birefringent optical; retarders laser; laser printed ... See more keywords