Results 91 to 100 of about 93,717 (313)
Advanced Photonics Research, EarlyView.Photonic resonances within a dielectric metasurface are investigated using photoelectron emission microscopy (PEEM) and finite‐difference time‐domain simulations. An electron inelastic mean free path of 35 ± 10 nm is extracted from comparisons between microscopy and simulations.
Andrew R. Kim +9 more
wiley +1 more source
, 2015 The concepts and considerations that could leads to the development of a novel kind of classes of wavefront sensors inwhich the information is retrieved by the absence of photons rather than from their presence are shown. In quantumoptics the concept of ”sensing” an object without actually having photons interacting with it is already known ...
openaire +2 more sources
Fake tilts in differential wavefront sensing
Optics Express, 2019 Two-beam interferometry is a tool of high-precision length-metrology, where displacements are measured to within sub-nanometer resolution and accuracy. Differential wavefront sensing - via phase detection by segmented photodiodes - adds the capability of simultaneously measuring the target translation and rotation.
Massa, Enrico +2 more
openaire +3 more sources
Acoustic Rayleigh Wave Turbulence in Soft Viscoelastic Matter
Advanced Science, EarlyView.Discrete acoustic Rayleigh wave turbulence (DARWT) is observed on the free surface of viscoelastic materials under monochromatic excitation. Governed by bulk shear rigidity supporting inertial modes against surface tension, the nonlinear Rayleigh waves exhibit distinct power‐law scaling and turbulence features in their Kolmogorov–Zakharov spectra. This
Mikheil Kharbedia +4 more
wiley +1 more source
Study of Point Scanning Detection Mechanisms for Vibration Signals with Wavefront Sensors
PhotonicsSeismic wave laser remote sensing is extensively employed in seismic monitoring and resource exploitation. This work establishes a vibration signal point scanning detection system utilizing wavefront sensors, leveraging their high resolution, array ...
Quan Luo +7 more
doaj +1 more source
High‐Fidelity Computational Microscopy via Feature‐Domain Phase Retrieval
Advanced Science, EarlyView.An innovative phase retrieval framework, termed FD‐PR, is uniquely established in the image's feature domain through the feature‐extracted, physical‐driven regression with interfaces for combining physics and image processing constraints. FD‐PR takes advantage of invariance components of an image against presences of model mismatch and uncertainty ...
Shuhe Zhang +4 more
wiley +1 more source
Advanced Science, EarlyView.“Illusion” is a captivating topic throughout human civilization. This research proposes an advanced multi‐layer metasurface illusion strategy utilizing a technique known as “inverse synthetic aperture radar (ISAR)” imaging, enabling the creation of illusions over broadband and wide‐angle.
Haoran Li +12 more
wiley +1 more source
Calibration and performance evaluation of a monomorph deformable mirror
Results in Optics, 2022 To achieve diffraction-limited performance with a 50 cm solar telescope at the Udaipur solar observatory the development of a high-order adaptive optics (AO) system is currently in progress. The system includes a monomorph deformable mirror (MDM) with 85
A. Raja Bayanna +3 more
doaj
Integrated modeling of wavefront sensing and control for space telescopes utilizing active and adaptive optics [PDF]
arXiv, 2023 Extreme wavefront correction is required for coronagraphs on future space telescopes to reach 1e-8 or better starlight suppression for the direct imaging and characterization of exoplanets in reflected light. Thus, a suite of wavefront sensors working in tandem with active and adaptive optics are used to achieve stable, nanometer-level wavefront ...
arxiv
Advanced Science, EarlyView.Electrically controlled optical switch and perfect absorption are achieved in the long wavelength infrared range by modulating the proton‐mediated metal‐insulator phase mixture of a single layer of SmNiO3 on an opaque sapphire substrate. Such an infrared switch is reversible and tunable over a broad temperature and wavelength range, which could shed ...
Xuefeng Cao +12 more
wiley +1 more source