Results 71 to 80 of about 176,252 (197)

A chirality switching device designed with transformation optics

open access: yesOptics Express, 2010
Based on transformation optics theory, we designed a chirality switching device, such that an object hidden inside would exhibit a reversed chirality (i.e., from left-handedness to right-handedness) for an observer at the far field. Distinct from a perfect mirror which also creates a chirality-reversed image, our device makes the original object ...
Shen, Yuan   +3 more
openaire   +3 more sources

Surface nanoscale axial photonics

open access: yes, 2011
Dense photonic integration promises to revolutionize optical computing and communications. However, efforts towards this goal face unacceptable attenuation of light caused by surface roughness in microscopic devices.
Fini, J. M., Sumetsky, M.
core   +1 more source

All-optical switch exploiting Fano resonance and subwavelength light confinement

open access: yesNanophotonics
We propose and experimentally demonstrate a small-mode volume bowtie cavity design for all-optical switching applications using a waveguide-cavity structure that exploits asymmetric Fano resonance lineshapes.
Saudan Quentin   +5 more
doaj   +1 more source

Photonic platform and the impact of optical nonlinearity on communication devices [PDF]

open access: yes, 2015
It is important to understand properties of different materials and the impact they have on devices used in communication networks. This paper is an overview of optical nonlinearities in Silicon and Gallium Nitride and how these nonlinearities can be ...
Ahmed, Md Shakil, Glesk, Ivan
core  

Performance enhancement of a thin film tungsten oxide based solid-state electrochromic device

open access: yesMaterials Research Express
Electrochromic devices for emissivity modulation hold immense promise for applications such as thermal management, dynamic optics, and radiative cooling. However, conventional all-solid-state electrochromic devices often suffer from slow switching speeds,
Bimal Nepal   +5 more
doaj   +1 more source

Optical conversion method [PDF]

open access: yes, 1978
An optical pickup comprising an electrooptical device located between two crossed polarizing devices all positioned along a common optical axis is described for switching a TV system between a color mode and a black and white mode.
Perry, W. E.
core   +1 more source

Fast widely tunable chiral nematic liquid crystal filter [PDF]

open access: yes, 2014
Chiral nematic liquid crystals (CLCs) can spontaneously arrange into helical structures with periodicities of a few hundred nanometers with a certain pitch (P) and corresponding periodic refractive index profile.
Beeckman, Jeroen   +2 more
core  

Highly Non-Linear Optical (NLO) organic crystals and films. Electrooptical organic materials [PDF]

open access: yes
Devices employing nonlinear optics (NLO) hold great promise for important applications in integrated optics, optical information processing and telecommunications. Properly designed organics possess outstanding optical and electrooptical properties which
Matthews, John   +2 more
core   +1 more source

Digital Beam Deflectors Based Partly on Liquid Crystals [PDF]

open access: yes
A digital beam deflector based partly on liquid crystals has been demonstrated as a prototype of a class of optical beam-steering devices that contain no mechanical actuators or solid moving parts.
Golovin, Andrii   +5 more
core   +1 more source

Merging metamaterial and fiber technologies

open access: yes, 2017
We report on integration of plasmonic and all-dielectric metamaterials into active photonic devices on the fiber platform. These include all-optical and electro-optical phase change and nano-opto-mechanical switching devices, dispersion control solution ...
Karvounis, Artemios   +6 more
core  

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