Results 21 to 30 of about 318 (100)

Optical Skyrmions with Tunable or Reconfigurable Topology Using Spin‐Decoupled Metaoptics

Laser &Photonics Reviews, EarlyView.
The work introduces advanced optical elements capable of generating and dynamically reconfiguring complex light patterns known as optical skyrmions. By precisely shaping light polarization at the nanoscale, a single engineered metasurface can generate and manipulate robust and tunable polarization textures in an efficient and scalable way.
Andrea Vogliardi, Daniele Bonaldo, Simone Dal Zilio, Vittorio Apolloni, Filippo Romanato, Gianluca Ruffato   +5 more
wiley   +1 more source

Multimode Phonon Lasing via Self‐Induced Optical Coherent Pumping

Laser &Photonics Reviews, EarlyView.
A silicon optomechanical nanobeam generates self‐sustained phonon lasing in multiple competing mechanical modes via self‐pulsing, an intrinsic optical modulation arising from cavity nonlinearity. This self‐organized mechanism enables robust multi‐frequency operation spanning periodic, quasi‐periodic, and chaotic regimes without external modulation. The
David Alonso Tomás, Carlos Mas Arabí, Carles Milián, Néstor E. Capuj, Alejandro Martínez, Daniel Navarro Urrios   +5 more
wiley   +1 more source

Adaptive Sliding‐Mode Control of a Perturbed Diffusion Process With Pointwise In‐Domain Actuation

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT A sliding mode–based adaptive control law is proposed for a class of diffusion processes featuring a spatially‐varying uncertain diffusivity and equipped with several point‐wise actuators located at the two boundaries of the spatial domain as well as in its interior.
Paul Mayr, Alessandro Pisano, Stefan Koch, Markus Reichhartinger   +3 more
wiley   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, Volume 600, Issue 6, Page 808-836, March 2026.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Synthesis of Robust Full Poincaré Polarization States via Spatial Coherence Engineering

Photonics
The full Poincaré (FP) beam, encompassing all possible polarization states in its beam cross-section, has demonstrated advantages in various applications. However, conventional FP beams are typically considered as spatially fully coherent, rendering them
Ruihui Zhang, Ming Zhang, Zhen Dong, Fei Wang, Yangjian Cai, Yahong Chen   +5 more
doaj   +1 more source

Effects of Acute Photobiomodulation on Heart Rate Variability in Physically Active Individuals: A Randomized and Controlled Clinical Trial

Journal of Biophotonics, Volume 19, Issue 3, March 2026.
This article is the first to approach the use of light acting on the vagus nerve in individuals undergoing physical exercise. Although we only obtained one isolated parameter as a difference in HRV, it is a first indication that we may be able to intervene in this vagal control process over the heart with PBM.
Reobbe Aguiar Pereira, Aparecida Maria Catai, Juliana Cristina Milan‐Mattos, Adriana Keila Dias, Nivaldo Antonio Parizotto   +4 more
wiley   +1 more source

Fabrication and Characterization of a Plasmonic Ellipsoidal Nanohole Array With Chiral Response

Advanced Photonics Research, Volume 7, Issue 2, February 2026.
An intrinsically chiral plasmonic platform is realized using ellipsoidal nanohole arrays where mirror symmetry is broken by a precise 18° structural rotation through a scalable displacement Talbot lithography approach. This architecture yields a significant circular dichroism signal of 20%–30% at normal incidence, offering a robust and high‐performance
Franco Marabelli, Margherita Angelini, Luca Zagaglia, Paola Pellacani, Konstantins Jefimovs, Dimitrios Kazazis, Francesco Floris   +6 more
wiley   +1 more source

Experimental generation of scalar and vector vortex Pearcey–Gauss beams

JPhys Photonics
In this manuscript, we put forward two new types of structured light beams, the vortex Pearcey–Gauss (VPeG) beam, with a homogeneous polarisation distribution, and the vector VPeG (VVPeG) beam, with a non-homogeneous polarisation distribution. The latter
Valeria Rodríguez-Fajardo, Gabriela Flores-Cova, Carmelo Rosales-Guzmán, Benjamin Perez-Garcia   +3 more
doaj   +1 more source

Dispersive Full‐Channel Jones Matrix Modulation in Elliptical Polarization Bases via a Single‐Layered Metasurface

Advanced Science, Volume 13, Issue 12, 27 February 2026.
This work presents a dispersive full‐channel Jones matrix modulation strategy using single‐layer metasurface. By synergizing wavelength dispersion engineering with elliptical polarization bases, independent control of four Jones matrix channels is achieved across multiple wavelengths.
Hairong He, Guangtao Cao, Shuhao Zhang, Hui Xu, Zhiquan Chen, Meiyu Peng, Yuting Jiang, Yueqiang Hu, Hui Jing, Huigao Duan, Hui Yang   +10 more
wiley   +1 more source

Advances in Delamination Analysis and Damage Prediction: A Comprehensive Review on Polymer Composite Materials

Engineering Reports, Volume 8, Issue 2, February 2026.
This comprehensive study advances delamination analysis in composites through innovative computational methods, experimental validation techniques, and predictive algorithms, collectively enhancing damage progression prediction and structural health monitoring for improved integrity in high‐performance applications.
Dhivya Elumalai, Ananda Babu Arumugam, Yitbarek Gashaw Tadesse, Mesfin Kebede Kassa, Mohit Gupta   +4 more
wiley   +1 more source