Results 181 to 190 of about 93,717 (313)

Full‐Space Spin‐Controlled Four‐Channel Metalens With Equal Power Distribution and Broad Bandwidth

Laser &Photonics Reviews, EarlyView.
In article xxxxx, Alex M. H. Wong and co‐authors propose a multifunctional full‐space metalens supporting power‐efficient, broadband operation for four spin‐controlled output channels. The metalens separates an incoming wave into four equi‐power, spin‐decoupled and function‐decoupled waves (two transmitted and two reflected).
Xiaoluo He, Bowen Ren, Ka Fai Chan, Alex M. H. Wong   +3 more
wiley   +1 more source

Complex wavefront sensing based on coherent diffraction imaging using vortex modulation. [PDF]

Sci Rep, 2021
Li R, Cao L.
europepmc   +1 more source

Strategies for high order wavefront sensing and control (HOWFSC) computation on future space telescopes [PDF]

, 2021
Nicholas Belsten, Leonid Pogorelyuk, Christian Haughwout, Eric Cady, Kerri Cahoy   +4 more
openalex   +1 more source

Maximized Enhancement of Polarized and Unpolarized Emissions via Critical Coupling in Brillouin Zone Folding Metasurfaces

Laser &Photonics Reviews, EarlyView.
Maximized emission enhancement is experimentally achieved using critical coupling in Brillouin zone folding metasurfaces. Maximized enhancements of polarized and unpolarized emissions from quantum dot‐coated dielectric metasurfaces are demonstrated in the normal direction.
Jungho Han, Yeonsoo Lim, Jeheon Lee, Seongheon Kim, Young Chul Jun   +4 more
wiley   +1 more source

Reflections on the Spatial Exponential Growth of Electromagnetic Quasinormal Modes

Laser &Photonics Reviews, EarlyView.
Quasinormal modes (QNMs) offer a robust framework for understanding the physics of resonators. However, conceptual challenges arise in regions distant from resonators, where QNM fields exponentially grow. This growth is not unphysical, but gives rise to counterintuitive effects, which is explained by examining fundamentals of non‐Hermitian systems ...
Tong Wu, José Luis Jaramillo, Philippe Lalanne   +2 more
wiley   +1 more source

Multi-layer Shack-Hartmann wavefront sensing in the point source regime. [PDF]

Biomed Opt Express, 2021
Akondi V, Dubra A.
europepmc   +1 more source

First results of an on-line adaptive optics system with atmospheric wavefront sensing by an artificial neural network

, 1992
Michael Lloyd‐Hart, Peter Wizinowich, B. A. McLeod, David Wittman, D’nardo Colucci, R. Dekany, Donald McCarthy, J. R. P. Anel, David G. Sandler   +8 more
openalex   +1 more source

Tracking Length and Differential-Wavefront-Sensing Signals from Quadrant Photodiodes in Heterodyne Interferometers with Digital Phase-Locked-Loop Readout [PDF]

, 2020
Gerhard Heinzel, M. Dovale Álvarez, Alvise Pizzella, Nils Brause, Juan José Esteban Delgado   +4 more
openalex   +1 more source

High‐Speed Multimode Fiber Imaging Using Binary‐Modulated Silicon Photonics Optical Phased Array

Laser &Photonics Reviews, EarlyView.
A multimode fiber imaging system at 500 frames per second is experimentally demonstrated. It is enabled by a p‐i‐n diode‐based silicon photonics optical phased array. To simplify the electrical driving of p‐i‐n diodes, a binary modulation method with a costumed‐designed digital driver circuit is proposed. Reconstruction of each frame takes only 0.1 ms,
Gaolei Hu, Yue Qin, Hongnan Xu, Hon Ki Tsang   +3 more
wiley   +1 more source

A Framework for Iterative Phase Retrieval Technique Integration into Atmospheric Adaptive Optics—Part II: High Resolution Wavefront Control in Strong Scintillations

Photonics
In this paper, we introduce atmospheric adaptive optics (AO) system architectures that utilize scintillation-resistant wavefront sensors based on iterative phase retrieval (IPR) techniques (described in detail in Part I) for closed-loop mitigation of ...
Mikhail A. Vorontsov, Ernst Polnau
doaj   +1 more source