Results 91 to 100 of about 32,180 (314)
Advanced Functional Materials, EarlyView.A dye‐based photoinitiator acting as a structure‐directing element, guides the formation of a cholesteric polymer network that behaves as a chirped photonic structure with dissipative chiral coupling. Photopolymerization freezes a depth‐dependent helical pitch, broadening the Bragg resonance spectrum.
Alfredo Mazzulla +2 more
wiley +1 more source
One-Step Combined-Nanolithography-and-Photolithography for a 2D Photonic Crystal TM Polarizer
Micromachines, 2014 Photonic crystals have been widely investigated since they have great potential to manipulate the flow of light in an ultra-compact-scale and enable numerous innovative applications.
Kyung-Hak Choi +6 more
doaj +1 more source
Photonic crystals for suppression of filamentation
, 2022 In this work we show the prospect of using periodic refractive index modulation – photonic crystals – to control the spatial dispersion curvature in a way that could potentially counteract the Kerr effect, thus suppressing filamentation.
Gailevicius, Darius +3 more
core +1 more source
Janus Photonic Graphics by Stratified Assembly of Two Distinct Colloids
Advanced Functional Materials, EarlyView.Double‐sided Janus photonic micropatterns with vivid structural colors are fabricated through a single‐step bottom‐up strategy. Density‐driven stratification and depletion‐mediated crystallization of PMMA and PS binary colloids lead to exclusive lattices on opposite surfaces under centrifugal force.
Young Geon Kim +4 more
wiley +1 more source
Photonic Molecules in Photonic Crystals
Japanese Journal of Applied Physics, 2006 We propose a photonic molecule consisting of multiple nanocavities in a photonic crystal and demonstrate its lasing and modal characteristics by finite-difference time-domain analysis and by experiments. In the analysis, we show that a point-shift defect and a point-missing defect have s- and p-orbital cavity modes, respectively, and that two adjacent ...
Satoru Ishii +2 more
openaire +1 more source
A geometry optimization framework for photonic crystal design
, 2012 The performance of photonic crystal devices can depend strongly on their geometry. Alas, their fundamental physics offers relatively little by way of pointers in terms of optimum shapes, so numerical design search techniques must be used in an attempt to
Thomas, K.S. +11 more
core +1 more source
THz waveguide and bends based on metallic photonic crystals [PDF]
, 2009 Metallic band-gap structures for THz waveguide and bends have been simulated using the finite element method.
E. Degirmenci +5 more
core +1 more source
Twin Crystal Moiré Metasurfaces for Crossing Flat‐Band Transport
Advanced Functional Materials, EarlyView.This study introduces twin crystal moiré metasurfaces, breaking in‐plane symmetry to enable reconfigurable acoustic wave manipulation. By adjusting the twin angle and interlayer twist angle, various combinations of hyperbolic, flat bands, and elliptic states can be synthesized in the system.
Shida Fan +9 more
wiley +1 more source
Chaotic behaviour of photonic crystals resonators
, 2015 We acknowledge support from the EPSRC (ADF, Fellowships No. EP/I004602/1 and No. EP/J004200/1) and KAUST (AF, Grant No. CRG-1-2012-FRA-005).We show here theoretically and experimentally how chaotic Photonic Crystal resonators can be used for en- ergy ...
Krauss, T.F. +10 more
core +1 more source
Design and fabrication techniques for a mid-infrared photonic crystal defect cavity in indium antimonide [PDF]
, 2009 Simulation results and fabrication details are presented for a two-dimensional AlxGayIn1-x-ySb photonic crystal membrane defect cavity. Peak emission is predicted at λ = 3.372 with a Q factor of 26233 for an optimized membrane thickness of 1000 nm ...
Rarity, John +26 more
core +1 more source