Results 251 to 260 of about 178,933 (313)

Wavelength‐Agnostic 3D‐Nanoprinted Coupler

Laser &Photonics Reviews, EarlyView.
A dual‐ellipsoidal 3D‐nanoprinted photonic coupler enables quasi‐free‐space propagation for wavelength‐agnostic, ultra‐broadband photonic interfacing. Combining matrix‐optics pre‐design with full‐vectorial simulations, it delivers a record‐wide 1 dB bandwidth exceeding 800 nm with ≈1.3 dB insertion loss.
Huiyu Huang, Zhitian Shi, Chunhui Yao, Richard Penty, Qixiang Cheng   +4 more
wiley   +1 more source

Direct Thermal Method to Characterize the Material Efficiency of Electrocaloric Lead Scandium Tantalate Multilayer Ceramic Capacitors. [PDF]

Materials (Basel)
Unmüßig S, Bach D, Metzdorf J, Corhan P, Hirose S, Bartholomé K.   +5 more
europepmc   +1 more source

Global and microlocal aspects of Dirac operators: Propagators and Hadamard states

Mathematische Nachrichten, EarlyView.
Abstract We propose a geometric approach to construct the Cauchy evolution operator for the Lorentzian Dirac operator on Cauchy‐compact globally hyperbolic 4‐manifolds. We realize the Cauchy evolution operator as the sum of two invariantly defined oscillatory integrals—the positive and negative Dirac propagators—global in space and in time, with ...
Matteo Capoferri, Simone Murro
wiley   +1 more source

State- and time-resolved observation of ultrafast intermolecular proton transfer in hydrated biomolecules. [PDF]

Nat Commun
Zhou J, Wu L, Belina M, Skitnevskaya AD, Jia S, Xue X, Hao X, Zeng Q, Ma Q, Zhao Y, Li X, He L, Luo S, Zhang D, Wang C, Trofimov AB, Slavíček P, Ding D, Ren X.   +18 more
europepmc   +1 more source

Photoreactivity of Norrish Type Photoinitiators for 3D Laser Printing via First Principles Calculations

Macromolecular Rapid Communications, EarlyView.
Quantum mechanical calculations demonstrate that Norrish Type I photoinitiators generate radicals in 3D laser printing through two‐photon absorption and bond cleavage in the lowest triplet state. In contrast, Type II photoinitiators initiate polymerization via processes involving higher triplet states and a unique third‐order mechanism.
Anna Mauri, Pascal Kiefer, Wolfgang Wenzel, Mariana Kozlowska   +3 more
wiley   +1 more source

Attosecond X-ray spectroscopy reveals the competing stochastic and ballistic dynamics of a bifurcating Jahn-Teller dissociation. [PDF]

Nat Commun
Matselyukh D, Svoboda V, Wörner HJ.
europepmc   +1 more source

Controlled diffusion processes in an adiabatic model of a bouncing ball [PDF]

Valdir Barbosa da Silva Junior, Ana Laura Boscolo, Diogo Ricardo da Costa, Luiz Antônio Barreiro   +3 more
openalex   +1 more source

Cold EI—The Way to Improve GC‐MS and Increase Its Range of Applications

Mass Spectrometry Reviews, EarlyView.
ABSTRACT Gas chromatography‐mass spectrometry (GC‐MS) with Cold electron ionization (EI) is based on interfacing the GC and MS with a supersonic molecular beam (SMB) along with electron ionization of vibrationally cold sample compounds in the SMB in a contact‐free fly‐through ion source (hence the name Cold EI).
Aviv Amirav, Benny Neumark, Oneg Elkabets, Alex Yakovchuk   +3 more
wiley   +1 more source

Shortcuts to adiabatic non-Abelian braiding on silicon photonic chips. [PDF]

Sci Adv
Song W, Liu X, Sun J, You O, Wu S, Chen C, Zhu S, Li T, Zhang S.   +8 more
europepmc   +1 more source

Recent Progress in Magnetoelastic Fe2P‐type Materials for Magnetocaloric Cooling

MetalMat, EarlyView.
This review mainly focuses on introducing the latest efforts to optimize the giant magnetocaloric performance of this material family, including doping with different elements, microstructural improvements, and practical manufacturing techniques. Besides that, we further suggest possible approaches to boost the material engineering and highlight ...
King Yin Ho, Fengqi Zhang, Xuefei Miao, Niels van Dijk, Ekkes Brück, Yang Ren   +5 more
wiley   +1 more source