Results 181 to 190 of about 4,821 (295)

Some differential complexes within and beyond parabolic geometry

, 2018
For smooth manifolds equipped with various geometric structures, we construct complexes that replace the de Rham complex in providing an alternative fine resolution of the sheaf of locally constant functions.
Eastwood, MG, Gover, AR, Bryant, RL, Neusser, K   +3 more
core  

Deterministic Fiber‐Optic Spectral Engineering Enables Three‐Color Multiplexed Two‐Photon Microscopy

Laser &Photonics Reviews, EarlyView.
A simulation‐guided spectral‐engineering framework maps the nonlinear parameter space of a fiber laser platform to identify balanced three‐band excitation states. The resulting 960, 1080, and 1175 nm femtosecond pulses deliver nJ‐level energies for low‐cross‐talk chromatically multiplexed two‐photon microscopy.
Marvin Edelmann, Andreu Matamoros‐Angles, Mohsin Shafiq, Mikhail Pergament, Franz X. Kärtner, Markus Glatzel   +5 more
wiley   +1 more source

Integration of 2D Materials in Radial van der Waals Heterostructure Metasurfaces. [PDF]

ACS Nano
Heimig C, Biechteler J, Cruciano C, Genco A, Weber T, Hirler M, Gryb D, de S Menezes L, Valentini G, Manzoni C, Cerullo G, Maier SA, Antonov AA, Sortino L, Tittl A.   +14 more
europepmc   +1 more source

Invariant Local Twistor Calculus For Quaternionic Structures And Related Geometries

, 1998
New universal invariant operators are introduced in a class of geometries which include the quaternionic structures and their generalisations as well as 4-dimensional conformal (spin) geometries.
A. Rod Gover, Jan Slovák
core  

Giant Phonon‐Enhanced Terahertz Electro‐Optic Response in Ferroelectric van der Waals NbOX2 (X = Br, I)

Laser &Photonics Reviews, EarlyView.
Van der Waals ferroelectric NbOX2 thin films exhibit phonon‐resonance enhanced electro‐optic responses, 332 pm/V at 3.1 THz (NbOI2) and 192 pm/V at 3.7 THz (NbOBr2), the highest among vdW materials, and show 4% non‐resonant SHG modulation together with resonant phonon‐enhancement under a 150 kV/cm THz pump.
Baolong Zhang, Ruihuan Duan, Zheng Liu, Ranjan Singh   +3 more
wiley   +1 more source

Control of Friction Laws in Tangential Adhesive Contacts by Surface Geometry. [PDF]

Materials (Basel)
Fritsch-Wilhayn J, Buranov K, Li Q, Nakano K, Popov VL.   +4 more
europepmc   +1 more source

Effect of Re or W Addition on the Oxidation Behaviour of a Compositionally Complex Ta–Mo–Cr–Ti–Al Alloy in Air at 1000°C

Materials and Corrosion, EarlyView.
The effect of addition of 3 at.% of either Re or W on the oxidation performance of equimolar Ta–Mo–Cr–Ti–Al is investigated and found to be beneficial, at least temporarily. Additionally, the oxide (Ti,Ta)O2 has been identified and characterised as a main part of the oxide scale. ABSTRACT Presuming that doping of protective (Cr,Ta,Ti)O2 with cations of
Björn Schäfer, Michael Dürrschnabel, Carsten Schroer, Fabian Lanoy, Emma White, Mathias Galetz, Chongchong Tang, Bronislava Gorr   +7 more
wiley   +1 more source

Anomalous Water Flow in Sub-Nanometer Carbon Nanoconfinement. [PDF]

Small
Masuduzzaman M, Bakli C, Barisik M, Kim B.   +3 more
europepmc   +1 more source

Generalized Cartan geometries and invariant differential operators

, 2008
We are getting familiar with difficulties with invariance of differential operators in case of parabolic geometries and fully characterize first order invariant operators. We define, so called curved Casimir operator.
Salač, Tomáš
core  

Liquid Crystal Elastomers Filaments for Adaptive Textiles and Soft Robotics: A Processing‐Centric Review

Macromolecular Rapid Communications, EarlyView.
Liquid crystal elastomer (LCE) filaments are fabricated through extrusion with in‐process UV curing, enabling controlled flow alignment and network locking of mesogens. The resulting structure responds to thermal or optical stimuli, inducing molecular reorientation and macroscopic contraction.
Anne Schwarz‐Pfeiffer, Shazia Mehtab
wiley   +1 more source