Results 71 to 80 of about 93,717 (313)

Advancement in Colloidal Metasurfaces: Approaches for Scalable Photonic Devices

Advanced Materials Interfaces, EarlyView.
This perspective explores colloidal metasurfaces composed of plasmonic and emitting nanoparticles assembled by laser interference lithography and template‐assisted self‐assembly methods. Precise design strategies achieve directional emission, low‐threshold lasing, and tunable photonic bandgaps.
Sezer Seçkin, Swagato Sarkar, Tobias A.F. König   +2 more
wiley   +1 more source

James Webb Space Telescope Optical Simulation Testbed I: Overview and First Results [PDF]

, 2014
The James Webb Space Telescope (JWST) Optical Simulation Testbed (JOST) is a tabletop workbench to study aspects of wavefront sensing and control for a segmented space telescope, including both commissioning and maintenance activities.
Anderson, Rachel, Choquet, Élodie, Egron, Sylvain, Elliott, Erin, Hartig, George, Lajoie, Charles-Phillipe, Leboulleux, Lucie, Levecq, Olivier, Long, Chris, Mountain, Matt, N'Diaye, Mamadou, Perrin, Marshall D., Pueyo, Laurent, Soummer, Rémi, van der Marel, Roeland, Ygouf, Marie   +15 more
core   +1 more source

Reconfigurable Manipulation of Sound with a Multimaterial 3D Printed Origami Metasurface

Advanced Materials Technologies, EarlyView.
This paper demonstrates a programmable origami‐inspired metasurface, using multimaterial three‐dimensional printing technology to achieve reconfigurable sound manipulation. The unique bistable design enables rapid switching between configurations, allowing for precise control of acoustic reflections with minimal mechanical input. The results showcase a
Dinh Hai Le, Felix Kronowetter, Yan Kei Chiang, Marcus Maeder, Steffen Marburg, David A. Powell   +5 more
wiley   +1 more source

Wavefront Curvature Sensing from Image Projections [PDF]

, 2006
This research outlines the development and simulation of a signal processing approach to real time wavefront curvature sensing in adaptive optics. The signal processing approach combines vectorized Charge Coupled Device (CCD) read out with a wavefront ...
Buffington, Jonathan C.
core   +1 more source

Film‐Based Multi‐Photon Lithography for Efficient Printing of Electromagnetic Surface Structures

Advanced Materials Technologies, EarlyView.
This work introduces film‐based multi‐photon lithography as an efficient method for fabricating electromagnetic surface structures with 2D and 2.5D geometries, particularly THz and mid‐IR metasurfaces. These structures can be fabricated on various substrates, such as glass or silicon‐on‐insulator, over areas ranging from mm2 to cm2, achieving feature ...
Gordon Zyla, Savvas Papamakarios, Dimitrios C. Zografopoulos, Anna Christoforidou, George Kenanakis, Maria Farsari, Odysseas Tsilipakos   +6 more
wiley   +1 more source

Unidirectional Focusing of Light Using Structured Diffractive Surfaces

Advanced Optical Materials, EarlyView.
This study presents a reciprocal diffractive unidirectional focusing design based on linear and isotropic layers. A set of cascaded diffractive layers is designed using deep learning to achieve efficient forward light focusing while suppressing backward propagation across various illumination angles.
Yuhang Li, Tianyi Gan, Jingxi Li, Mona Jarrahi, Aydogan Ozcan   +4 more
wiley   +1 more source

Improved Phase Diversity Wavefront Sensing with a Deep Learning-Driven Hybrid Optimization Approach

Photonics
Phase diversity wavefront sensing (PDWS) is a model-based wavefront estimation technique that avoids additional optical components, making it suitable for resource-constrained environments.
Yangchen Wang, Ming Wen, Hongcai Ma
doaj   +1 more source

Efficient decoding of 2D structured illumination with linear phase stepping in X-ray phase contrast and dark-field imaging. [PDF]

PLoS ONE, 2014
The ability to map the phase distribution and lateral coherence of an x-ray wavefront offers the potential for imaging the human body through phase contrast, without the need to deposit significant radiation energy. The classic means to achieve this goal
Katherine J Harmon, Eric E Bennett, Andrew A Gomella, Han Wen   +3 more
doaj   +1 more source

Wavefront Sensing by a Common-Path Interferometer for Wavefront Correction in Phase and Amplitude by a Liquid Crystal Spatial Light Modulator Aiming the Exoplanet Direct Imaging

Photonics, 2023
We implemented the common-path achromatic interfero-coronagraph both for the wavefront sensing and the on-axis image component suppression, aiming for the stellar coronagraphy.
Andrey Yudaev, Alexander Kiselev, Inna Shashkova, Alexander Tavrov, Alexander Lipatov, Oleg Korablev   +5 more
doaj   +1 more source

Photochromic Organic–Inorganic Material for Focusable Adaptive Lenses Fabrication

Advanced Photonics Research, EarlyView.
This study investigates a zirconia‐based hybrid organic–inorganic material incorporating dithienylethene molecules for adaptive optics. It offers excellent photochromic properties, thermal stability, and adjustable thickness, enabling effective refractive index modulation.
Giorgia Franchin, Veronica Torresan, Alessandro Gandin, Rossella Castagna, Chiara Bertarelli, Stefano Bonora, Giovanna Brusatin   +6 more
wiley   +1 more source