🔬 Category

physics.optics

270 papers

Technical design report of a complete and compact broadband high-harmonics femtosecond beamline based on a modular hollow waveguide for photons generation centered on the upper region of the extreme ultraviolet spectral range

This paper presents the design, implementation, and theoretical validation of a compact, modular, and cost-effective tabletop high-harmonics generation beamline utilizing a hollow capillary waveguide to produce intense, broadband extreme ultraviolet and soft X-ray pulses for ultrafast pump-probe spectroscopy of complex optoelectronic devices.

Yohann Brelet, Arnaud Marquette, Nicolas Beyer + 5 more2026-03-06🔬 physics.atom-ph

Topological Magneto-optical Kerr Effect without Spin-orbit Coupling in Spin-compensated Antiferromagnet

This study experimentally demonstrates a topological magneto-optical Kerr effect in the noncoplanar antiferromagnet Co1/3TaS2 that arises from real-space scalar spin chirality without relying on spin-orbit coupling or net magnetization, thereby establishing a new mechanism for ultrafast, stray-field-immune opto-spintronic applications.

Camron Farhang, Weihang Lu, Kai Du + 4 more2026-03-05🔬 physics.optics

Silicon nitride on-chip C-band spontaneous emission generation based on lanthanide doped microparticles

This paper presents a hybrid fabrication method that integrates monodisperse lanthanide-doped microparticles into silicon nitride waveguide wells to generate broadband C-band spontaneous emission, achieving a 0.25% coupling efficiency and offering a scalable route for on-chip active light sources.

Dmitry V. Obydennov, Ilya M. Asharchuk, Alexander M. Mumlyakov + 5 more2026-03-05🔬 physics.optics

Modeling high-order harmonic generation in quantum dots using a real-space tight-binding approach

This paper introduces a computationally efficient three-dimensional real-space tight-binding model, parameterized via DFT and Wannierization, to accurately simulate the size-dependent suppression of high-order harmonic generation in quantum dots, thereby filling a theoretical gap for medium-sized nanostructures that cannot be described by existing methods for periodic solids or small molecules.

Martin Thümmler, Alexander Croy, Ulf Peschel + 1 more2026-03-05🔬 physics.optics

Quantifying classical and quantum bounds for resolving closely spaced, non-interacting, simultaneously emitting dipole sources in optical microscopy

This paper utilizes parameter estimation theory to quantify the classical and quantum precision limits for resolving the separation of closely spaced, non-interacting dipole sources in high-numerical-aperture microscopy, demonstrating that while the vectorial nature of emission complicates the analysis, appropriate polarization filtering combined with image inversion interferometry can still saturate the quantum Fisher information bound.

Armine I. Dingilian, Aarnah Kurella, Cheyenne S. Mitchell + 3 more2026-03-05⚛️ quant-ph

Cubic-in-magnetization contributions to the magneto-optic Kerr effect investigated for Ni(001) and Ni(111) thin films

This paper theoretically derives and experimentally validates the third-order magneto-optic tensor describing cubic-in-magnetization contributions to the Kerr effect in Ni(001) and Ni(111) thin films, revealing that the resulting anisotropy is significantly more pronounced in the (111) orientation, where it manifests as distinct three-fold angular dependencies.

Robin Silber, Maik Gaerner, Kamil Postava + 2 more2026-03-05🔬 physics.optics

Absolute Primary Nanothermometry Using Individual Stark Sublevels of Rare-Earth-doped Crystals

This paper presents and experimentally demonstrates two independent optical methods for absolute primary nanothermometry using rare-earth-doped nanoparticles, which determine temperature solely from the internal population dynamics of Stark sublevels without external references, thereby enabling single-ion, wide-range thermal sensing at the nanoscale.

Allison R. Pessoa, Thomas Possmayer, Jefferson A. O. Galindo + 4 more2026-03-05🔬 cond-mat.mtrl-sci

Accelerating Inverse Design of Optical Metasurfaces: Analytic Gradients of Periodic Green's Functions via Quasi-Modular Forms

This paper presents an end-to-end analytic gradient engine for optimizing 2D Bravais lattices in optical metasurface inverse design by leveraging Quasi-Modular Forms to derive exact derivatives of periodic Green's functions, thereby achieving machine-precision accuracy and a 6.5-fold speedup over traditional finite-difference methods.

Mingcan Qin, Yifeng Qin2026-03-05🔬 physics.optics

Phase-Sensitive Nonlinear X-Ray Response in a Charge-Density-Wave Quantum Material

This study demonstrates that phase-sensitive nonlinear x-ray spectroscopy, utilizing x-ray parametric down-conversion and reciprocal-lattice phase matching in 1T-TaS2, reveals distinct orbital-selective electronic responses and enhanced nonlinear signals in the nearly commensurate charge-density-wave phase that are inaccessible to conventional linear probes.

S. Sofer, G. J. Man, A. Bombardi + 1 more2026-03-05🔬 physics.optics

Video-rate volumetric chemical imaging via mid-infrared photothermal optical diffraction tomography

This paper introduces mid-infrared photothermal optical diffraction tomography (MIP-ODT), a novel technique that overcomes the speed-sensitivity trade-off in label-free vibrational microscopy to achieve video-rate, quantitative, three-dimensional chemical imaging of living cells, enabling the real-time tracking of lipid droplet dynamics and rapid hyperspectral organelle phenotyping.

Masato Fukushima, Keiichiro Toda, Yusei Sugawara + 2 more2026-03-05🔬 physics.optics

Harnessing Selective State Space Models to Enhance Semianalytical Design of Fabrication-Ready Multilayered Huygens' Metasurfaces: Part I - Field-based Semianalytical Synthesis

This paper presents a semianalytical framework that extends sparse metagrating models to densely packed Jerusalem-cross meta-atoms, enabling rapid, full-wave-validated synthesis of fabrication-ready, dual-polarized Huygens' metasurfaces through an efficient phase-to-geometry lookup table and a judicious scaling method for wideband operation.

Sherman W. Marcus, Natanel Nissan, Vinay K. Killamsetty + 4 more2026-03-05🔬 physics.optics