Results 31 to 40 of about 433,207 (247)

High-power thin-disk lasers emitting beams with axially-symmetric polarizations

Nanophotonics, 2021
We present the intracavity generation of beams with radial polarization at an average output power of 750 W and an optical efficiency of 43% from a continuous wave thin-disk laser. Circular grating waveguide output couplers (GWOC) were used to select the
Abdou Ahmed Marwan, Beirow Frieder, Loescher André, Dietrich Tom, Bashir Danish, Didychenko Denys, Savchenko Anton, Pruss Christof, Fetisova Marina, Li Fangfang, Karvinen Petri, Kuittinen Markku, Graf Thomas   +12 more
doaj   +1 more source

Balancing Hydrophobicity and Hydrophilicity: Dual Filler‐Engineered Proton Exchange Membranes for Durable, High‐Power Fuel Cells

Advanced Functional Materials, EarlyView.
Polarity‐matched Zr–MOFs program Nafion's nanoscale morphology during solution casting. Hydrophilic UiO‐66 preserves hydrated pathways, while hydrophobic UiO‐67 increases the proton hopping sites by densifying ionic clusters. Combining both fillers yields a membrane that delivers 176 mS cm−1 conductivity, reaches 1.46 W cm−2 under 200 kPa, and triples ...
Yonghwi Cho, Yunseong Ji, Minkyu Choi, Junsu Kim, Yejin Kim, Su Jeong Lee, Wooyoung Choi, Choong Hoo Lee, Ju Yeon Kim, Ohchan Kwon, Hanim Kim, Du Yeol Ryu, Ki Chul Kim, Dae Woo Kim   +13 more
wiley   +1 more source

Thermoresponsive Liquid Crystalline Polymer Coatings Programmed by Field‐Induced Topological Defects for Tunable Optical and Topographical Responses

Advanced Functional Materials, EarlyView.
Resonant standing waves generate large‐area lattices of liquid‐crystal topological defects that are permanently encoded into polymer coatings by photopolymerization. The preserved director architecture produces thermally reconfigurable surface topographies while maintaining programmable optical functionality, demonstrating a scalable strategy for ...
Jacques A. Peixoto, Mufeeduzaman Chavilkkadan, Alexander Fusi, Marko Beslać, Dirk J. Broer, Etienne Brasselet, Danqing Liu   +6 more
wiley   +1 more source

Generation and measurement of gamma rays with axially symmetric polarization states via Compton scattering

Physical Review Research
Highly polarized gamma rays with linear or circular polarization are essential light sources for nuclear and particle physics experiments, astronomical detector evaluations, and relativistic electron beam diagnostics.
Yoshitaka Taira, Yuxuan Yang, Toshiyuki Shizuma, Mohamed Omer   +3 more
doaj   +1 more source

Local spin polarization in high energy heavy ion collisions

Physical Review Research, 2019
We reexamine the azimuthal angle dependence of the local spin polarization of hyperons in heavy ion collisions at 200 GeV in the framework of the (3+1)-dimensional viscous hydrodynamic model CLVisc.
Hong-Zhong Wu, Long-Gang Pang, Xu-Guang Huang, Qun Wang   +3 more
doaj   +1 more source

Optical spin-dependent beam separation in cyclic group symmetric metasurface

Nanophotonics, 2020
Cross-polarization scattering of a circularly polarized beam from nano-rod introduces a geometric phase to the outgoing beam with opposite circular polarization.
Lee Yeon Ui, Ozerov Igor, Bedu Frédéric, Kim Ji Su, Fages Frédéric, Wu Jeong Weon   +5 more
doaj   +1 more source

Oblique light incidence method to study topological defects in nematic layers with conical boundary conditions

Scientific Reports, 2021
A polarization microscopy method to investigate the orientational structures and boojums formed in the chiral and achiral nematic layers under conical (tilted) boundary conditions has been developed.
Mikhail N. Krakhalev
doaj   +1 more source

Upcycling Keratin‐Based Textile Waste Into High‐Performance Hybrid Fibers Via Tuning the Interfacial Interactions

Advanced Functional Materials, EarlyView.
Keratin recovered from animal‐hair textile waste is fractionated and blended with cellulose to produce continuously spun hybrid fibers. Selecting the high‐molecular‐weight keratin fraction enables 30 wt.% keratin incorporation while maintaining high strength in dry and wet states.
Mian Zhai, Daniel Van Opdenbosch, Inge Schlapp‐Hackl, Teemu Välisalmi, Markus Linder, Michael Hummel, Wenwen Fang   +6 more
wiley   +1 more source

Spin angular momentum density in the tight focus of a light field with phase and polarization singularities [PDF]

Компьютерная оптика, 2019
For a light field with both phase and polarization singularities at its center, expressions are obtained that describe the distribution of the spin angular momentum (SAM) density in the sharp focal spot of an aplanatic system.
Alexey Kovalev, Victor Kotlyar, Darya Kalinkina   +2 more
doaj   +1 more source

Twin-Lever Multifunctional Meta-Optics With High Longitudinal Tolerance. [PDF]

Adv Sci (Weinh)
We introduce a single‐layer, CMOS‐compatible metasurface that allows for polarization‐programmable, achromatic broadband dual‐mode imaging with high longitudinal tolerance. The twin‐lever design combines bright‐field focusing and vortex‐based edge‐enhanced imaging while managing axial intensity distribution from 488 to 633 nm.
Javed I, Kim K, Shah AR, Kang D, Kim J, Satti AJ, Liu X, Zubair M, Xiong J, Mehmood MQ, Rho J.   +10 more
europepmc   +2 more sources