Results 131 to 140 of about 3,411,820 (225)

Wavelength‐Selective Nonlinear Wavefront Control in Resonant Thin‐Film Lithium Niobate Metasurfaces

open access: yesAdvanced Photonics Research, Volume 7, Issue 10, October 2026.
A LN metasurface converts a Gaussian pump beam into a first‐order Hermite–Gaussian second‐harmonic beam, exploiting spectrally distinct Mie‐type resonances across two nanostructured regions. The resonance‐engineered phase difference enables wavelength‐selective wavefront shaping, active only within a specific spectral window, while leaving the ...
Madona Mekhael   +6 more
wiley   +1 more source

On the Limits of a Space‐Time Description and the Physical Meaning of Phase Space in a Nonlocal Continuum

open access: yesAnnalen der Physik, Volume 538, Issue 10, October 2026.
Nonlocal quantum field theory predicts a finite phase‐space resolution, so even highly squeezed quantum states cannot be localized beyond a fundamental nonlocal limit, providing a potential experimental signature of nonlocality. ABSTRACT In a previous paper we derived an uncertainty relation for nonlocal fields by showing that the physical localization
E. J. Thompson
wiley   +1 more source

Polarization‐Dependence of Nonlinear Optical Effects in Silicon: The Case of Ultrafast Processing

open access: yesAdvanced Physics Research, Volume 5, Issue 10, October 2026.
The dependence of the input polarization for the nonlinear optical propagation in silicon is investigated theoretically and experimentally. The perturbative regime is examined using pump‐probe shadowgraphy and nonlinear transmission, whereas the case of permanent laser‐induced modifications is addressed using a combination of Raman micro‐spectroscopy ...
Namig Alasgarzade   +6 more
wiley   +1 more source

A Test Function Method for Weakly Coupled Systems With Derivative‐Type Nonlinearity

open access: yesMathematische Nachrichten, Volume 299, Issue 10, Page 3015-3035, October 2026.
ABSTRACT We consider a two by two system of inequalities which include fractional powers of the Laplace operator, coupled through a semilinear term of derivative type. We prove the nonexistence of global‐in‐time weak solutions for powers below the critical curve and possibly on the critical curve.
Marcello D'Abbicco, Antonio Lagioia
wiley   +1 more source

A quantum magneto-photo-thermoelastic model for wave propagation in laser-excited semiconductors. [PDF]

open access: yesSci Rep
Al-Sunousi HF   +5 more
europepmc   +1 more source

United States, northern border 1878

open access: yes, 1878
Index map title: Index map, Joint Series. Shows the United States and Canadian border from the summit of the Rocky Mountains to the northwest angle of the Lake of the Woods. Relief shown by hachures and spot heights. Title from second sheet. First sheet
United States Northern Boundary Commission
core  

Analysis of Eigenvalue Clustering Leads to Optimal Scaling in Numerical Radiative Transfer

open access: yesNumerical Linear Algebra with Applications, Volume 33, Issue 5, October 2026.
ABSTRACT We consider a multidimensional polychromatic radiative transfer (RT) problem, accounting for scattering processes in a general form, that is, anisotropic (dipole) scattering with partial frequency redistribution. Given a discrete ordinates (SN$$ {S}_N $$) discretization, we report the corresponding matrix structures, depending on the model and
Pietro Benedusi   +3 more
wiley   +1 more source

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