Results 61 to 70 of about 286,805 (345)
, 2002 A method is introduced to analyze the degeneracy properties of the band structure of a photonic crystal making use of the super cells. The band structure associated with a super cell of a photonic crystal has degeneracies at the edge of the Brillouin ...
C. M. Anderson +21 more
core +1 more source
ALD‐Assisted VO2 for Memristor Application
Advanced Engineering Materials, EarlyView.This work demonstrates a strategy for depositing VOx using thermal atomic layer deposition (ALD) followed by thermal annealing to synthesize VO2. The thin film and core/shell wire memristors exhibit excellent switching performance and are highly sensitive to ambient temperature.
Jun Peng +7 more
wiley +1 more source
Cm-Level Photonic-Crystal-Like Subwavelength Waveguide Platform with High Integration Density
Applied Sciences, 2019 In this paper, the cm-level photonic-crystal-like subwavelength waveguide platform is developed and analyzed by using the finite-difference time-domain method.
Xiangxin Huang +3 more
doaj +1 more source
Slow light enhanced correlated photon pair generation in photonic-crystal coupled-resonator optical waveguides [PDF]
Opt. Express 21, 8596-8604 (2013), 2013 We demonstrate the generation of quantum-correlated photon pairs from a Si photonic-crystal coupled-resonator optical waveguide. A slow-light supermode realized by the collective resonance of high-Q and small-mode-volume photonic-crystal cavities successfully enhanced the efficiency of the spontaneous four-wave mixing process.
arxiv +1 more source
Spatiotemporal Photonic Crystals
Conference on Lasers and Electro-Optics, 2020 We study photonic systems periodic in both time and space - spatiotemporal photonic crystals, and find that their bandstructure contains both frequency and momentum bandgaps. When the two types of bandgaps coincide, anomalous bandstructure is observed.
Yaakov Lumer +4 more
openaire +2 more sources
Photonic crystal microchip laser [PDF]
SPIE Proceedings, 2016 AbstractThe microchip lasers, being very compact and efficient sources of coherent light, suffer from one serious drawback: low spatial quality of the beam strongly reducing the brightness of emitted radiation. Attempts to improve the beam quality, such as pump-beam guiding, external feedback, either strongly reduce the emission power, or drastically ...
Gailevicius, Darius +5 more
openaire +9 more sources
Advanced Engineering Materials, EarlyView.This study presents rapid evaluation methods for scan strategies in powder bed fusion (PBF) of polymers with a NIR laser as an example for its application. It uses line buffer‐based calculations and point density fields to predict the performance of four different scan strategies. The methods show promising results in laser‐based PBF of polymer samples,
Simon Leupold +9 more
wiley +1 more source
Optical Kossel Lines and Fluorescence in Photonic Liquid Crystals
Crystals, 2020 We propose a general analytical way to describe the fluorescence peculiarities in photonic liquid crystals (revealing themselves as an optical analog of the X-ray Kossel lines in conventional crystals) based at the localized optical edge modes existing ...
Vladimir A. Belyakov
doaj +1 more source
Dual index properties of photonic crystal and its application in subwavelength focusing
Materials Research Express, 2021 Based on the two-dimensional dielectric wedge-shaped photonic crystal, we studied the existence of two kinds of equivalent refractive indexes (negative refractive index is −1, positive refractive index is 1.897) in the photonic crystal by means of fast ...
Bingming Liang +4 more
doaj +1 more source
, 2011 This article presents experimental results on properties of waves propagating in an unbounded and a bounded photonic crystal consisting of metallic cylinders which are arranged in a triangular lattice. First, we present transmission measurements of plane
Bittner, S. +3 more
core +1 more source