Results 81 to 90 of about 67,680 (348)

Multiwavelength polarization insensitive lenses based on dielectric metasurfaces with meta-molecules [PDF]

, 2016
Metasurfaces are nano-structured devices composed of arrays of subwavelength scatterers (or meta-atoms) that manipulate the wavefront, polarization, or intensity of light.
Arbabi, Amir, Arbabi, Ehsan, Faraon, Andrei, Horie, Yu, Kamali, Seyedeh Mahsa   +4 more
core   +3 more sources

Optoelectronic Synaptic Devices Using Molecular Telluride Phase‐Change Inks for Three‐Factor Learning

Advanced Functional Materials, EarlyView.
Optoelectronic synaptic devices based on solution‐processed molecular telluride GST‐225 phase‐change inks are demonstrated for three‐factor learning. A global optical signal broadcast through a silicon waveguide induces non‐volatile conductance updates exclusively in locally electrically flagged memristors.
Kevin Portner, Dhananjeya Kumaar, Giacomo Torti, Killian Keller, Till Zellweger, Florian M. Schenk, Christoph Weilenmann, Daniel Chelladurai, Vara Prasad Jonnalagadda, Ghazi Sarwat Syed, Vanessa Wood, Jürg Leuthold, Alexandros Emboras, Maksym Yarema, Mathieu Luisier   +14 more
wiley   +1 more source

Multi-Directional Strain Measurement in Fiber-Reinforced Plastic Based on Birefringence of Embedded Fiber Bragg Grating

Sensors
Embedded fiber Bragg gratings are increasingly applied for in-situ strain measurement in fiber-reinforced plastics, integral to high-end aerospace equipment.
Chunhua Zhou, Changhao Chen, Zilong Ye, Qi Wu, Ke Xiong   +4 more
doaj   +1 more source

Capacity of Wavelength and Time Division Multiplexing for Quasi-Distributed Measurement Using Fiber Bragg Gratings

Advances in Electrical and Electronic Engineering, 2015
In this paper, an analysis of the use of wavelength and time division multiplexing techniques for quasi-distributed measurement in uniform fiber Bragg gratings is presented.
Marcel Fajkus, Isa Navruz, Stanislav Kepak, Alan Davidson, Petr Siska, Jakub Cubik, Vladimir Vasinek   +6 more
doaj   +1 more source

Supermodes of grating-coupled multimode waveguides and application to mode conversion between copropagating modes mediated by backward Bragg scattering [PDF]

, 1999
An analysis of multimode waveguides where several modes are coupled via quasiperiodic perturbations is presented. The supermodes (or eigenmodes) of the structure are derived and orthonormality considerations are discussed. In addition, a new type of mode
Peral, Eva, Yariv, Amnon
core   +1 more source

Photon Avalanching Nanoparticles: The Next Generation of Upconverting Nanomaterials?

Advanced Functional Materials, EarlyView.
This Perspective outlines the mechanistic foundations that enable photon‐avalanche (PA) behavior in lanthanide nanomaterials and contrasts them with emerging application spaces and forward‐looking design strategies. By bridging threshold engineering, energy‐transfer dynamics, and materials engineering, we provide a coherent roadmap for advancing the ...
Kimoon Lee, Yunseo Kim, Hyeong‐ku Jo, Dongjoon Yoon, Byeonghyeok Im, WonJeong Yu, Eui‐Rim On, Changhwan Lee   +7 more
wiley   +1 more source

Cladding mode coupling in highly localized fiber Bragg gratings: modal properties and transmission spectra

, 2010
The spectral characteristics of a fiber Bragg grating (FBG) with a transversely inhomogeneous refractive index profile, differs con- siderably from that of a transversely uniform one.
Andreas Tünnermann, Chan, Erdogan, Erdogan, Graham D. Marshall, Guo, Guo, Hewlett, Hewlett, Homoelle, Jens Thomas, Jovanovic, Jáuregui, Kogelnik, M. J. Steel, Marshall, Martinez, Martinez, Michael J. Withford, Mizrahi, Mizunami, Nemanja Jovanovic, Ramachandran, Ria G. Becker, Smelser, Snyder, Steel, Stefan Nolte, Thomas, Tsao, Zhou   +30 more
core   +1 more source

Fiber Bragg grating regeneration temperature in standard fibers [PDF]

SPIE Proceedings, 2015
This work has been supported by the project TEC2013-47264-C2-1-R.
Rodríguez Cobo, Luis||, Quintela Incera, Antonio||, Shokry Girgis Roufael, Hany, López Higuera, José Miguel||   +3 more
openaire   +2 more sources

3D‐Printed Hygroscopic Polymer Networks for High‐Humidity Triboelectric Nanogenerators to Wirelessly Power Implantable Electronic Devices‐ A Conceptual Pathway

Advanced Functional Materials, EarlyView.
This work develops 3D‐printable tribopolymer networks that can enhance triboelectric performance under high humidity environments. Polar hydrophilic functional groups and incorporation of zwitterionic monomers promote bound‐water–dominated interfacial polarization thereby increasing electrical outputs.
Linguangze Zhuo, Jiawang Zeng, Qian Chen, Valentin A. Bobrin, Deepak Mishra, Anthony Chun Yin Yuen, Yixia Zhang, Cyrille Boyer, Jin Zhang   +8 more
wiley   +1 more source

Bio-Chemical Sensors Based on Excessively Tilted Fiber Grating

Photonic Sensors
Excessively tilted fiber gratings (ExTFGs) are a type of special optical fiber grating device different from traditional fiber Bragg gratings, long period fiber gratings, and tilted fiber Bragg gratings.
Fudan Chen, Hong Gu, Binbin Luo, Shenghui Shi   +3 more
doaj   +1 more source