Results 141 to 150 of about 1,349 (239)

Programmable non-Hermitian photonic quantum walks via dichroic metasurfaces

APL Photonics
The evolution of a closed quantum system is described by a unitary operator generated by a Hermitian Hamiltonian. However, when certain degrees of freedom are coupled to an environment, the relevant dynamics can be captured by non-unitary evolution ...
Paola Savarese, Sarvesh Bansal, Maria Gorizia Ammendola, Lorenzo Amato, Raouf Barboza, Bruno Piccirillo, Francesco Di Colandrea, Lorenzo Marrucci, Filippo Cardano   +8 more
doaj   +1 more source

Multispectral Concentric Grafted Perfect Vector Vortex Beam

Laser &Photonics Reviews, EarlyView.
Multispectral structured light offers powerful opportunities for increasing information capacity. A multispectral concentric grafted perfect vector vortex beam is proposed to engineer topological charges and polarization. A metasurface can graft different perfect vector vortex beams across concentric spatial regions and extend this concept to ...
Guanchao Wang, Hammad Ahmed, Chunmei Zhang, Yu Wang, Xiuyou Han, Li Li, Xianzhong Chen   +6 more
wiley   +1 more source

Wavelength and Full‐Polarization Encrypted Orbital Angular Momentum Meta‐Holography

Laser &Photonics Reviews, EarlyView.
By multiplexing three independent degrees of freedom of light, a single‐layer geometric‐phase metasurface encrypts 24 distinct holographic images across 3 wavelengths, 12 pairs of orthogonal polarizations, and 4 OAM channels, taking advantage of axial chromatic dispersion to reconstruct the color images at the same plane. ABSTRACT Multiplexing multiple
Yue Han, Mingna Xun, Yuqing He, Sheng Ye, Weiping Wan, Yan Li   +5 more
wiley   +1 more source

Language-controllable programmable metasurface empowered by large language models

Nanophotonics
Programmable metasurface has become a prominent tool in various areas including control, communication, computing, and so on, due to its unique capability in the electromagnetic (EM) manipulation. However, it is lack of the intelligence in the sense that
Hu Shengguo, Xu Jiawen, Li Mingyi, Cui Tie Jun, Li Lianlin   +4 more
doaj   +1 more source

Reconfigurable Giant Nonreciprocity at Near‐Normal Incidence via Phase‐Change Magneto‐Optical Metagratings

Laser &Photonics Reviews, EarlyView.
A phase‐change magneto‐optical metagrating combines GST switching with InAs guided‐mode resonances to achieve strong nonreciprocal absorption contrast near normal incidence. A static magnetic bias creates direction‐dependent resonant splitting, while GST crystallization quenches and latches the response.
Ye Ming Qing, Yi Shen, Jun Wu, Shunsuke Murai, Zhaogang Dong, Koichi Okamoto   +5 more
wiley   +1 more source

Efficient and Tunable Narrowband Second‐Harmonic Generation by a Large‐Area Etchless Lithium Niobate Metasurface

Laser &Photonics Reviews, EarlyView.
An etchless lithium niobate (LN) metasurface with a slanted periodic TiO2 grating enables efficient and narrowband second‐harmonic generation (SHG) thanks to the light confinement in the LN film granted by quasi‐bound‐state‐in‐the‐continuum (q‐BIC) modes.
Yaping Hou, Yigong Luan, Yu Fan, Alfonso Nardi, Attilio Zilli, Bobo Du, Jinyou Shao, Marco Finazzi, Chunhui Wang, Lei Zhang, Michele Celebrano   +10 more
wiley   +1 more source

Tunable Terahertz Generation in Dispersion‐Engineered ZnTe Waveguides

Laser &Photonics Reviews, EarlyView.
A dispersion‐engineered Zinc Telluride (ZnTe) slab waveguide platform enables tunable and efficient guided‐wave terahertz (THz) generation through modal phase matching. By tailoring the optical and THz modal dispersion, coherent THz emission is achieved across 0.1–3 THz.
Arun Jana, Cormac McDonnell, Mai Tal, Anastasiya Reveguk, Amit Kohn, Tal Ellenbogen   +5 more
wiley   +1 more source

Engineering Disordered Many‐Particle Plasmonic Nanoclusters for Wafer‐Scale Uniform and Giant Electromagnetic Field Enhancement

Laser &Photonics Reviews, EarlyView.
This work presents a lithography‐ and etching‐free dewetting strategy that assembles many‐particle gold nanostructures into uniform plasmonic substrates at the wafer scale. By forming satellite nanoparticles between larger ones, the method achieves giant and highly reproducible electromagnetic enhancement.
Minjun Kim, Vasanthan Devaraj, Hyeon‐Seok Seo, Seong‐Jae Eom, Jeong‐Su Lee, Donghan Lee, Min Yong Jeon, Thomas Zentgraf, Jong‐Min Lee   +8 more
wiley   +1 more source

Generating Helical Polymorphic Beams Using Dielectric Metasurfaces

Laser &Photonics Reviews, EarlyView.
Helix‐shaped polymorphic beams are optical fields whose intensity maxima spiral around the propagation axis, enabling particle manipulation through attractive or repulsive forces. Traditionally requiring expensive spatial light modulators, metasurfaces now provide a compact, cost‐effective alternative. This work demonstrates general helical polymorphic
Maryam Setareh, Yang Xu, Jose A. Rodrigo, Kenneth B. Crozier   +3 more
wiley   +1 more source

Spatially Uniform and Defect‐Tolerant Plasmonic Responses in 3D Printed Gold Nanoparticle Assemblies

Laser &Photonics Reviews, EarlyView.
We introduce 3D nanoprinting of gold nanoparticle assemblies and show that their broad optical responses remain reproducible despite structural disorder. This robustness is attributed to ensemble‐averaged plasmonic responses from many local coupling regions.
Vasanthan Devaraj, Sunghyun Kwak, Hyeongjip Kim, Sang‐Keun Sung, Jong‐Min Lee, Thomas Zentgraf, Won‐Geun Kim   +6 more
wiley   +1 more source