Results 71 to 80 of about 107,362 (279)
Sub‐THz Multifunctional Metasurfaces for Independent Transmission or Reflection Phase Manipulation
Advanced Optical Materials, EarlyView.This article presents a rigorous analysis, design, and characterization of a novel sub‐THz metalens and reflective metasurface. Unlike bulky optical systems, the proposed thin, planar metasurface enables dual‐band full‐space wavefront control, via low‐loss transmission and reflection phase tuning, offering compact integration and improved ...
Bilal Ouardi +5 more
wiley +1 more source
Advanced Optical Materials, EarlyView.A simple and efficient method for determining the stability of optical vortices via Fourier transform using a conventional spherical lens is presented. The theoretical and experimental results demonstrate a practical approach to directly and unambiguously measure the magnitude and sign of the topological charge of a beam without altering an ...
Elena Melnikova +5 more
wiley +1 more source
Advanced Optical Materials, EarlyView.A diffractive neural networkdesigned metasurface operating at 86 GHz generates multiple holographic patterns by controlling the phase of subwavelength unit cells. A phase‐smoothing regularization mitigates mutual coupling, enabling accurate multifunctional wavefront shaping.
Damián Rodríguez‐Trujillo +5 more
wiley +1 more source
Wavefront sets in algebraic quantum field theory
, 1998 The investigation of wavefront sets of n-point distributions in quantum field theory has recently acquired some attention stimulated by results obtained with the help of concepts from microlocal analysis in quantum field theory in curved spacetime.
Verch, Rainer
core +2 more sources
High quality factor metasurfaces for two-dimensional wavefront manipulation [PDF]
, 2023 Claudio U. Hail +4 more
openalex +1 more source
Advanced Optical Materials, EarlyView.An ultrabroadband THz microlens with high resolution is presented and fabricated via commercially available 3D printing by transforming the phase profile into a thickness profile. The proposed method enables high‐fidelity THz hyperspectral imaging with high spatial and spectral resolution, representing a cost‐effective and reliable solution.
Jin Chen +5 more
wiley +1 more source
Detection of phase singularities with a Shack-Hartmann wavefront sensor
, 2006 While adaptive optical systems are able to remove moderate wavefront distortions in scintillated optical beams, phase singularities that appear in strongly scintillated beams can severely degrade the performance of such an adaptive optical system ...
Aksenov +19 more
core +1 more source
Performance limits of adaptive-optics/high-contrast imagers with pyramid wavefront sensors [PDF]
, 2020 Carlos Correia +5 more
openalex +1 more source
Strategies for high order wavefront sensing and control (HOWFSC) computation on future space telescopes [PDF]
, 2021 Nicholas Belsten +4 more
openalex +1 more source
Tunable Multifunctional Terahertz Coding Metasurface for Polarization Manipulation
Advanced Photonics Research, EarlyView.Coding metasurfaces (CMs) offer versatile control over electromagnetic waves. Herein, a tunable multifunctional terahertz (THz) metasurface integrated with vanadium dioxide (VO2) is presented, enabling propagation‐phase manipulation of linearly polarized waves and hybrid‐phase control of circularly polarized waves.
Chunsheng Zhang +10 more
wiley +1 more source