Results 81 to 90 of about 2,024,523 (345)
Dark‐State Guided‐Mode Resonance Sensors: Engineering Miniature Sensing Platforms
Advanced Optical Materials, EarlyView.This research introduces compact guided‐mode resonance sensing using Gaussian‐beam‐induced symmetry breaking to excite dark states. The method generates high‐quality resonance signals in a small area, demonstrating a sensor with 128 micro‐cells and 200 nm RIU−1 sensitivity, showing potential for lab‐on‐chip and biosensing applications.
Yeong Hwan Ko +2 more
wiley +1 more source
Wavefront sensor and wavefront corrector matching in adaptive optics
Optics Express, 2007 Matching wavefront correctors and wavefront sensors by minimizing the condition number and mean wavefront variance is proposed. The particular cases of two continuous-sheet deformable mirrors and a Shack-Hartmann wavefront sensor with square packing geometry are studied in the presence of photon noise, background noise and electronics noise.
openaire +3 more sources
Illuminating Quantum Phenomena in 2D Materials: The Power of Optical Spectroscopy
Advanced Optical Materials, EarlyView.Atomically thin 2D materials host quantum tunnelling, plasmonic and excitonic phenomena driven by reduced dimensionality and strong many‐body interactions. This review links these effects to state‐of‐the‐art optical probes—NSOM, pump–probe, CARS, TRR, and optical frequency comb spectroscopy—highlighting how their ultrahigh spatial–temporal resolution ...
Yuhui Zhou +4 more
wiley +1 more source
Learning-based Shack-Hartmann wavefront sensor for high-order aberration detection.
Optics Express, 2019 We present a learning-based Shack-Hartmann wavefront sensor (SHWS) to achieve the high-order aberration detection without image segmentation or centroid positioning.
Lejia Hu, Shuwen Hu, W. Gong, Ke Si
semanticscholar +1 more source
Smart Theremin Based on Electromagnetic Metasurfaces for Fine Dual‐Hand Perception
Advanced Optical Materials, EarlyView.The proposed Meta‐Theremin leverages a frequency‐spatial multiplexing metasurface to enable robust dual‐hand perception by shielding environmental noise and confining EM fields to interaction zones. Its physics‐informed neural network decouples hand‐specific echoes, enhancing accuracy.
Che Liu +8 more
wiley +1 more source
Atmosphere, 2021 A method to detect the atmospheric turbulent layers using a single Shack–Hartmann wavefront sensor is discussed. In order to determine the height distribution of the atmospheric turbulence above a telescope, we register the wavefront distortions at ...
Artem Yurievich Shikhovtsev +6 more
doaj +1 more source
Flat Optics for Polarization Structure Engineering from 2D to 3D
Advanced Optical Materials, EarlyView.Metasurfaces have transformed polarization control by enabling precise engineering of complex polarization structures. This review explores their evolution from generating 2D polarization structures to shaping fully 3D polarization fields. By unlocking the unprecedented control over the polarization and spectral information of light, these advances ...
Buxiong Qi, Yan Li, Xianzhong Chen
wiley +1 more source
Object wave reconstruction by speckle illumination and phase retrieval [PDF]
Journal of the European Optical Society-Rapid Publications, 2009 An innovative setup for the speckle-based phase retrieval method is proposed. In the conventional setup, a plane wave illuminates the test object and the transmitted wavefront is incident on a diffuser aperture generating a speckle field.
Almoro P. F., Hanson S. G.
doaj +1 more source
A telescope-ready approach for modal compensation of pyramid wavefront sensor optical gain
Astronomy & Astrophysics, 2019 The pyramid wavefront sensor (PWFS) is the currently preferred design for high-sensitivity adaptive optics (AO) systems for extremely large telescopes (ELTs).
V. Deo +7 more
semanticscholar +1 more source
Estimation of atmospheric turbulence parameters from Shack–Hartmann wavefront sensor measurements [PDF]
Monthly notices of the Royal Astronomical Society, 2018 The estimation of atmospheric turbulence parameters is of relevance for: a) site evaluation & characterisation; b) prediction of the point spread function; c) live assessment of error budgets and optimisation of adaptive optics performance; d ...
P. Andrade +4 more
semanticscholar +1 more source