Aluminum Plasmonic Metasurface Enabling a Wavelength-Insensitive Phase Gradient for Linearly Polarized Visible Light
Sign Up to like & getrecommendations! Published in 2017 at "ACS Photonics"
DOI: 10.1021/acsphotonics.6b00783
Abstract: For conventional phase-gradient metasurfaces, the phase tuning is mostly fulfilled by the exploitation of a nanoantenna- or a Pancharatnam–Berry-phase-based nanoresonator. The former scheme typically suffers from a dispersive phase gradient, while the latter is dispersionless… read more here.
Keywords: plasmonic metasurface; phase; wavelength insensitive; phase gradient ... See more keywords
High-efficiency tri-band quasi-continuous phase gradient metamaterials based on spoof surface plasmon polaritons
Sign Up to like & getrecommendations! Published in 2017 at "Scientific Reports"
DOI: 10.1038/srep40727
Abstract: A high-efficiency tri-band quasi-continuous phase gradient metamaterial is designed and demonstrated based on spoof surface plasmon polaritons (SSPPs). High-efficiency polarizaiton conversion transmission is firstly achieved via tailoring phase differece between the transmisive SSPP and the… read more here.
Keywords: high efficiency; phase; tri band; quasi continuous ... See more keywords
Noncanonical perfect vortex beams enabled via nonuniformly varying phase gradient
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Applied Physics"
DOI: 10.1063/1.5142650
Abstract: A method is proposed for generating noncanonical perfect vortex beams (PVBs) based on a theory deduced from the definition of topological charge. Varying the phase gradient of the light field in the region of the… read more here.
Keywords: phase; varying phase; perfect vortex; phase gradient ... See more keywords
Phase-Gradient Metasurfaces Based on Local Fabry–Pérot Resonances
Sign Up to like & getrecommendations! Published in 2020 at "Chinese Physics Letters"
DOI: 10.1088/0256-307x/37/9/097801
Abstract: In this work we present a new mechanism for designing phase-gradient metasurfaces (PGMs) to control an electromagnetic wavefront with high efficiency. Specifically, we design a transmission-type PGM formed by a periodic subwavelength metallic slit array… read more here.
Keywords: local fabry; based local; gradient metasurfaces; metasurfaces based ... See more keywords
Anomalous light steering by phase gradient metasurface with subwavelength metallic grating
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Physics D: Applied Physics"
DOI: 10.1088/1361-6463/ab2c77
Abstract: Both sub-wavelength periodic structures and phase gradient metasurfaces have opened up new degrees of freedom to steer light in a compact structure, respectively. In this work, a metallic grating with a sub-wavelength period is introduced… read more here.
Keywords: phase gradient; sub wavelength; physics; metallic grating ... See more keywords
Controlling the light diffraction through a single subwavelength metallic slit via phase gradient
Sign Up to like & getrecommendations! Published in 2023 at "New Journal of Physics"
DOI: 10.1088/1367-2630/acd0cc
Abstract: In this work, we show that the concept of phase gradient metasurfaces provides a versatile way to control the diffraction of light through small holes or slits. As an example, we consider a single subwavelength… read more here.
Keywords: single subwavelength; slit; phase gradient; phase ... See more keywords
Multitarget Respiration Monitoring Based on Cumulative Phase Gradient Approach
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Geoscience and Remote Sensing Letters"
DOI: 10.1109/lgrs.2023.3266818
Abstract: Simultaneous measurements of multitarget vital signs have been quite challenging for radar-based noncontact vital signs monitoring. This letter presents a novel cumulative phase gradient approach (CPGA) for accurate estimates of multitarget respirations without either range… read more here.
Keywords: gradient approach; cumulative phase; phase gradient; respiration ... See more keywords
Frequency Scanning Radiation by Decoupling Spoof Surface Plasmon Polaritons via Phase Gradient Metasurface
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Transactions on Antennas and Propagation"
DOI: 10.1109/tap.2017.2767625
Abstract: On the basis of generalized Snell’s law of reflection, we propose to achieve frequency scanning radiation by decoupling spoof surface plasmon polaritons (SSPPs) from a corrugated metallic strip (CMS). Phase gradient metasurface (PGM) is utilized… read more here.
Keywords: frequency scanning; frequency; scanning radiation; surface ... See more keywords
Generalized Phase Gradient Autofocus Using Semidefinite Relaxation Phase Estimation
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Transactions on Computational Imaging"
DOI: 10.1109/tci.2019.2948733
Abstract: Recently, we developed a generalized phase gradient autofocus (GPGA) algorithm for performing synthetic aperture radar (SAR) autofocus over arbitrary flight paths, including both near-field and bistatic collection geometries. A key step of the GPGA algorithm… read more here.
Keywords: gradient autofocus; phase estimation; generalized phase; phase gradient ... See more keywords
Acoustic metasurfaces with rapid change profiles
Sign Up to like & getrecommendations! Published in 2017 at "Journal of the Acoustical Society of America"
DOI: 10.1121/1.4987595
Abstract: Acoustic metasurfaces with subwavelength unit cells modulating the phase of sound wave were developed to realize beam forming, steering, focusing, and recently carpet cloaking. However, these metasurfaces were used for small phase gradient applications and… read more here.
Keywords: acoustic metasurfaces; phase gradient; change profiles; rapid change ... See more keywords
Amplified measurement of weak optical activity using a spin-phase-gradient beam.
Sign Up to like & getrecommendations! Published in 2018 at "Optics letters"
DOI: 10.1364/ol.43.004337
Abstract: Development of alternate techniques to polarimetry for the measurement of weak optical rotation, with improved sensitivity, is becoming increasingly important as one understands the role of chirality in drug design and synthesis and the fundamentals… read more here.
Keywords: spin phase; gradient beam; phase gradient;