Results 91 to 100 of about 418,956 (371)
Advanced Functional Materials, EarlyView.Carboxyl‐functionalized graphene quantum dots (cGQDs) exhibit high singlet oxygen quantum yield due to strong spin–orbit coupling. cGQDs achieve minimum bactericidal concentration of only 0.4 µg mL−1 against S. aureus under low‐intensity illumination.
Muhammad Hassnain +10 more
wiley +1 more source
Suspended silicon mid-infrared waveguide devices with subwavelength grating metamaterial cladding.
Optics Express, 2016 We present several fundamental photonic building blocks based on suspended silicon waveguides supported by a lateral cladding comprising subwavelength grating metamaterial.
J. S. Penadés +10 more
semanticscholar +1 more source
Scattering in twisted waveguides
Journal of Functional Analysis, 2014 28 pages; typos corrected; to appear in Journal of Functional ...
Georgi Raikov +3 more
openaire +6 more sources
Multimode nematicon waveguides [PDF]
Optics Letters, 2011 We report on the first experimental observation of higher-order modes guided by soliton-induced waveguides in unbiased nematic liquid crystals. We find that the nematicon waveguides operate in a bounded power region specific to each guided mode. Below this region the guided beams diffract, above it the mode mixing and coupling give rise to an unstable ...
Izdebskaya, Yana +3 more
openaire +5 more sources
Elucidating Sodium Ion Storage Mechanisms in Hard Carbon Anodes at the Electronic Level
Advanced Functional Materials, EarlyView.High‐resolution, multi‐frequency continuous wave, and pulsed Electron Paramagnetic Resonance (EPR) spectroscopy uncover the intricate Na ion storage mechanisms in hard carbon. This study reveals the coexistence of Na ion intercalation and solvent co‐intercalation, alongside a subsequent transition of Na ions from ionic to quasi‐metallic to metallic ...
Qingbing Xia +5 more
wiley +1 more source
Micromachines, 2018 In this paper, we have proposed a polymer-based photonic crystal (PhC) resonator, with multiple sizes of cavities, and a waveguide to be used as highly sensitive optical sensor components.
Jiayi Sun +5 more
doaj +1 more source
Disulfide Glass: An Optical Polymer for Commodity Plastics, Precision Optics, and Photonics
Advanced Functional Materials, EarlyView.From oil and glass refining to high performance commodity polymers with enhanced thermomechanical and optical properties—the synthesis of a new high refractive index, highly transparent optical thermoset polymer is reported, termed, disulfide glass that affords a robust optical glass amenable to fabrication of precision optics and thin film photonic ...
Jake Molineux +15 more
wiley +1 more source
Nanophotonics, 2018 Chip-scale integrated optical signal processors promise to support a multitude of signal processing functions with bandwidths beyond the limit of microelectronics.
Xie Yiwei +2 more
doaj +1 more source
IEEE Photonics Journal, 2016 We have proposed a reverse ridge strip waveguide and a slot waveguide structure for the dispersion compensation at 1550 nm wavelength. The resonance between strip- and slot-waveguide modes has been used to calculate the dispersion at the required ...
Ashok Nandam +3 more
doaj +1 more source
Optical polarizer/isolator based on a rectangular waveguide with helical grooves [PDF]
, 2006 A chirality-based approach to making a one-way waveguide that can be used as an optical isolator or a polarizer is described. The waveguide is rectangular, and chirality is introduced by making slanted rectangular grooves on the waveguide walls. Chirality of the waveguide manifests as a strong circular dichroism, and is responsible for transmitting one
arxiv +1 more source