Results 101 to 110 of about 1,160,454 (280)

Polarization singularities in a stress-engineered optic

Journal of the Optical Society of America A, 2019
We develop a simplified version of a recently presented model to simulate the oblique propagation of polarized light through a thick birefringent element known as a stress-engineered optic (SEO). We use this model to analyze the formation and evolution of three polarization singularities, stars, lemons, and monstars, and experimentally verify the ...
Ashan Ariyawansa, Kevin Liang, Thomas G. Brown   +2 more
openaire   +2 more sources

Exciton Binding Energy Modulation in 2D Perovskites: A Phenomenological Keldysh Framework

Advanced Functional Materials, EarlyView.
The intrinsic screening effects are successfully decoupled from structural distortion by rigorously designing a series of 2D perovskites. This enabled us to demonstrate how the dielectric environment modulates the quasiparticle bandgap and exciton binding energy.
Kitae Kim, Namhee Kwon, Sang Woo Park, Wonsik Kim, Seunghwan Kim, Eunki Yoon, Aelim Ha, Donggyu Lee, Young Yong Kim, Jong‐Cheol Lee, Sungho Lee, Junghan Lee, Kyu Hyoung Lee, Yeonjin Yi, Ki‐Ha Hong, Soohyung Park   +15 more
wiley   +1 more source

Spin and orbital Hall effects in the tight focus of coaxial superposition of two cylindrical vector beams of different-parity orders

Компьютерная оптика
We study tight focusing of coaxial superposition of two cylindrical vector beams (CVB) of different orders. In the initial plane, the polarization singularity index of such superposition equals the half-sum of the orders of the two constituent CVBs. Such
V.V. Kotlyar, A.A. Kovalev, S.S. Stafeev, A.M. Telegin   +3 more
doaj   +1 more source

Visualizing polarization singularities in Bessel-Poincaré beams

Optics Express, 2015
We demonstrate that an annulus of light whose polarization is linear at each point, but the plane of polarization gradually rotates by π radians can be used to generate Bessel-Poincaré beams. In any transverse plane this beam exhibits concentric rings of polarization singularities in the form of L-lines, where the polarization is purely linear ...
Shvedov, Vladlen, Karpinski, Pawel, Sheng, Yan, Chen, Xin, Zhu, Weiren, Hnatovsky, Kyrylo (Cyril), Krolikowski, Wieslaw   +6 more
openaire   +3 more sources

Melt Grafting of Geometry‐Tailored Voltage Stabilizers for High‐Performance Polypropylene Insulation

Advanced Functional Materials, EarlyView.
A scalable one‐step melt grafting strategy is developed to enhance the dielectric properties of isotactic polypropylene by covalently incorporating thermally stable aromatic voltage stabilizers. This solvent‐free approach improves volume resistivity and DC breakdown strength through deep trap formation and charge localization, offering a sustainable ...
Nazirul Mubin bin Normansah, Taehoon Kwon, Hana Kim, Shin‐Ki Hong, Seung Won Lee, Se Hee Lee, Ik‐Su Kwon, Masahiro Kozako, Minhee Kim, Seunggun Yu   +9 more
wiley   +1 more source

Germanane Quantum Dots Promote Metabolic Reprogramming of Immune Cells Toward Regulatory T Cells and Suppress Inflammation In Vitro and In Vivo

Advanced Functional Materials, EarlyView.
Metabolic changes in immune cells direct the phenotype and function of the host immune system. Smart nanomaterials must target metabolic pathways to direct immune cell fate. This study reports the fabrication and first application of germanane quantum dots (GeHQDs) to modulate inflammation in vitro and in vivo.
Abhay Srivastava, Alireza Rafieerad, Weiang Yan, Keshav Narayan Alagarsamy, Qingdong Guan, Leena Regi Saleth, Michel Aliani, Sanjiv Dhingra   +7 more
wiley   +1 more source

Enantioselective Growth of Chiral Serine‐Induced β‐Ag2Se Crystals from an Organoselenium Compound

Advanced Functional Materials, EarlyView.
Chiral amino acids direct the enantioselective crystallization of β‐Ag2Se nanocrystals from an organoselenium precursor. L‐ and D‐serine induce distinct morphologies and opposite homochiral adsorption preferences, transferring molecular handedness into the inorganic lattice.
Matan Oliel, Yarden B. Moshe, Gil Otis, Dana D. Medina, Yitzhak Mastai, Subhomoy Das   +5 more
wiley   +1 more source

Optical Third-Harmonic Generation in Graphene

Physical Review X, 2013
We report strong third-harmonic generation in monolayer graphene grown by chemical vapor deposition and transferred to an amorphous silica (glass) substrate; the photon energy is in three-photon resonance with the exciton-shifted van Hove singularity at ...
Sung-Young Hong, Jerry I. Dadap, Nicholas Petrone, Po-Chun Yeh, James Hone, Richard M. Osgood, Jr.   +5 more
doaj   +1 more source

Corrigendum to “Phase Singularities to Polarization Singularities”

International Journal of Optics, 2021
null Ruchi, P. Senthilkumaran, Sushanta Kumar Pal   +2 more
openaire   +2 more sources

Impact of Surface Functionalization on NV Quantum Properties: Implications for Biosensing with Fluorescent Nanodiamonds

Advanced Functional Materials, EarlyView.
Fluorescent nanodiamonds (fNDs) have emerged as an invaluable quantum sensing platform for biological and biochemical systems. This paper investigates the influence of common surface functionalization strategies for bioconjugation on the quantum properties of nitrogen vacancy (NV) centers in nanodiamonds.
Anja Sadžak, Iván Pérez, Mateja Guimarães, Lukas Spantzel, Fedor Jelezko, Michael Börsch, Anke Krueger   +6 more
wiley   +1 more source