Results 81 to 90 of about 11,755 (309)

The Diffraction Efficiency of Acrylate-Based Holographically Photopolymerized Gratings Enhanced by the Dark Reaction

Photonics
Photopolymers, especially acrylate-based ones with low cost and simple preparation, are promising materials for high-efficiency holographic gratings. However, it is still challenging to achieve high-performance gratings, due to the influences of many ...
Ziyan Bai, Wenfeng Cai, Ming Cheng, Shun Lan, Delai Kong, Jian Shen, Mengjia Cen, Dan Luo, Yuan Chen, Yan Jun Liu   +9 more
doaj   +1 more source

Design and Fabrication of a Holographic Radial Polarization Converter

Photonics, 2020
Radial polarization converters can convert an incident light into a radially polarized light, which is beneficial in a variety of applications. In this paper, a new design of holographic radial polarization converter is proposed which consists of eight ...
Jing-Heng Chen, Hung-Lung Tseng, Fan-Hsi Hsu, Chien-Yuan Han, Kun-Huang Chen, Chien-Hung Yeh, Ken-Yuh Hsu   +6 more
doaj   +1 more source

Calculation of the diffraction efficiency on concave gratings based on Fresnel–Kirchhoff’s diffraction formula [PDF]

, 2013
Fraunhofer diffraction formula cannot be applied to calculate the diffraction wave energy distribution of concave gratings like plane gratings because their grooves are distributed on a concave spherical surface.
Huang, Yuanshen, Xu, Banglian, Li, Baicheng, Ni, Zhengji, Zhuang, Songlin, Zhang, Dawei, Li, Ting, Tao, Chunxian, Ling, Jinzhong, Hong, Ruijin   +9 more
core   +1 more source

Self‐Seeded Nucleation of PET in a Benign Solvent Yields a High Modulus Aerogel With Ultra‐Low Thermal Conductivity

Advanced Materials, EarlyView.
A new benign solvent (1,3‐diphenylacetone) enables a simple, safe, and sustainable dissolution and gelation method to convert waste PET into low density, monolithic aerogels with high mechanical strength (E = 20 MPa) and remarkably low thermal conductivity (k = 21.9 to 28.9 mW/m·K).
Kira R. Baugh, Garrett F. Godshall, Glenn A. Spiering, Isabela Trindade Coutinho, Alejandro A. Rodriguez, Katherine J. Wood, Aiyana Gonzalez‐Arellano, Sadeq Malakooti, Stephanie L. Vivod, Robert B. Moore   +9 more
wiley   +1 more source

Near‐Unity Chiral Lasing Enabled by Quasi‐Bound States in the Continuum

Advanced Materials, EarlyView.
Nanoimprinted chiral array that supports bound states in the continuum is doped with an efficient non‐chiral molecule (Rhodamine‐B) acting as gain medium to produce fully circularly polarized lasing emission. The chiral lasing wavelength can be tuned across the emission band of Rhodamine‐B by adjusting the coating thickness of the TiO2 high refractive ...
Jose Mendoza‐Carreño, Luis A. Pérez, Carlota Ruiz De Galarreta, Théo Rouanet, M. Isabel Alonso, Agustín Mihi   +5 more
wiley   +1 more source

On‐Water Surface Synthesis of 2D Conjugated Metal–Organic Framework Films With Controllable Layer Orientation Enabling High‐Performance Chemiresistive Sensing

Advanced Materials, EarlyView.
Layer orientation dictates charge transport in 2D conjugated metal–organic frameworks, yet controllable methods remain scarce. We report surfactant monolayer‐assisted on‐water synthesis of cm2‐scale Ni‐HHTP films with programmable face‐on and edge‐on orientations.
Jianjun Zhang, Víctor García‐López, Yutong Wu, Shuai Fu, Yucong Chen, Arsh S. Hazrah, Petko Petkov, Mike Hambsch, Feng Ni, Alina Müller, Ye Yang, Leif Riemenschneider, Shirong Huang, Albertus Mattheüs Sandee, Yilv Guo, David Silva‐Brea, Jan‐Ole Joswig, Stefan C. B. Mannsfeld, Thomas Heine, Gianaurelio Cuniberti, Mischa Bonn, Zhiyong Wang, Xinliang Feng   +22 more
wiley   +1 more source

Fourier Analysis of the Nonlinearity of Surface-Relief Optical Transmission Gratings of Quasi-Sinusoidal Profile Fabricated in Optical Glasses and Crystals by Carbon, Nitrogen and Oxygen Ion Microbeams

Photonics
Optical transmission gratings with quasi-sinusoidal surface-relief profiles were inscribed in IOG and Pyrex glasses and in Bi12GeO20, Er: LiNbO3, and Er: Fe: LiNbO3 crystals by microbeams of carbon, nitrogen, and oxygen ions at ion energies of 5, 6, and ...
István Bányász, István Rajta, Vladimir Havránek, Robert Magnusson, Gyula Nagy   +4 more
doaj   +1 more source

The diffraction properties of plane reflection gratings [PDF]

, 1974
Chapter 1 outlines the development of both ruling and holographic techniques for the production of diffraction gratings. The evolution of theoretical formulisms for describing the diffraction by gratings is also described.
McPhedran, RC (15929984)
core   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

RETRACTED: Exploration of a Flexible Metasurface for Strain Sensors: A Perspective from 2D Grating Fabrication to Spectral Characterization

Applied Sciences, 2022
Hao Hu, Bayanheshig
doaj   +1 more source