Results 61 to 70 of about 2,429,627 (344)

Physical and Chemical Preparation Techniques and Applications of Photonic Crystals: A Review

open access: yesCrystals
Photonic crystals, which are important functional materials, are formed by the periodic arrangement of materials with different dielectric constants that have photonic bandgaps and localization properties. Their preparation methods are primarily physical
Yifan Zhang   +6 more
doaj   +1 more source

Macroscopic photonic single crystals via seeded growth of DNA-coated colloids

open access: yesNature Communications, 2023
Photonic crystals—a class of materials whose optical properties derive from their structure in addition to their composition—can be created by self-assembling particles whose sizes are comparable to the wavelengths of visible light.
Alexander Hensley   +4 more
doaj   +1 more source

Photoactivation of NV Centers in Diamond via Continuous Wave Laser Illumination of Shallow As‐Implanted Nitrogen

open access: yesAdvanced Functional Materials, EarlyView.
This study demonstrates an alternative method of creating charge‐stable negatively charged nitrogen vacancy (NV−) centers close to the diamond surface without high‐temperature annealing. By illuminating nitrogen‐implanted regions with a continuous‐wave 405 nm laser, NV− centers are induced, exhibiting electron spin coherence properties suitable for ...
Jens Fuhrmann   +4 more
wiley   +1 more source

Bio‐inspired photonic crystals: Tailoring the dielectric building blocks to control the light propagation

open access: yesBMEMat
Photonic crystals have drawn tremendous attention in recent years owing to their unique optical properties and remarkable advantages in various applications such as bioassays, sensors and optical devices. Benefiting from the spatially ordered structures,
Cun Zhu, Lei Tian, Wei Cheng, Zhongze Gu
doaj   +1 more source

Maxwell Fish-Eye and Half-Maxwell Fish-Eye Based on Graded Photonic Crystals

open access: yesIEEE Photonics Journal, 2018
We report on the design of the Maxwell fish-eye based on graded photonic crystals. It is a radially graded refractive index structure, whose remarkable property is to form perfect images in the sense of geometrical optics.
Fabian Gaufillet, Eric Akmansoy
doaj   +1 more source

Possible realization of directional optical waveguides in photonic crystals with broken time-reversal symmetry. [PDF]

open access: yesPhysical Review Letters, 2005
We show how, in principle, to construct analogs of quantum Hall edge states in "photonic crystals" made with nonreciprocal (Faraday-effect) media. These form "one-way waveguides" that allow electromagnetic energy to flow in one direction only.
F. Haldane, S. Raghu
semanticscholar   +1 more source

Copper‐based Materials for Photo and Electrocatalytic Process: Advancing Renewable Energy and Environmental Applications

open access: yesAdvanced Functional Materials, EarlyView.
Cu‐based catalysts as a cornerstone in advancing sustainable energy technologies are fully reviewed in this manuscript, highlighting their potential in photo‐ and electrocatalysis. It includes metallic copper, copper oxides, copper sulfides, copper halide perovskites, copper‐based metal–organic frameworks (MOFs), and covalent organic frameworks (COFs),
Jéssica C. de Almeida   +16 more
wiley   +1 more source

Design of Waveguide Polarization Convertor Based on Asymmetric 1D Photonic Crystals

open access: yesNanomaterials, 2022
Photonic crystals possess metastructures with a unique dispersion relation. An integrated optical circuit plays a crucial role in quantum computing, for which miniaturized optical components can be designed according to the characteristics of photonic ...
Fu-Li Hsiao   +11 more
doaj   +1 more source

Kinetic Insights into Precursor‐Assisted Soft Sphere Close Packing Revealed by In Situ GISAXS with Implications for Gas Sensing

open access: yesAdvanced Functional Materials, EarlyView.
The versatile precursor‐assisted soft sphere close packing during slot‐die coating is investigated with in situ X‐ray scattering. The soft crystallization pathways towards a close packing involve multistep structural transitions such as surface nucleation, in‐plane, and out‐of‐plane crystallization.
Guangjiu Pan   +14 more
wiley   +1 more source

Advances in Functional Solution Processed Planar 1D Photonic Crystals

open access: yesAdvanced Optical Materials, 2018
An overview on the properties and applications of polymer and inorganic planar 1D photonic crystals fabricated from solution is provided here. In the last decades, photonic crystals became technologically relevant for light management, photovoltaics ...
P. Lova, G. Manfredi, D. Comoretto
semanticscholar   +1 more source

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