Results 51 to 60 of about 5,691 (305)

Experimental demonstration of cylindrical vector spatiotemporal optical vortex

Nanophotonics, 2021
We experimentally generate cylindrically polarized wavepackets with transverse orbital angular momentum, demonstrating the coexistence of spatiotemporal optical vortex with spatial polarization singularity.
Chen Jian, Wan Chenhao, Chong Andy, Zhan Qiwen   +3 more
doaj   +1 more source

Emerging 2D Materials and Their Hybrid Nanostructures for Label‐Free Optical Biosensing: Recent Progress and Outlook

Advanced Functional Materials, EarlyView.
This review highlights recent advances in label‐free optical biosensors based on 2D materials and rationally designed mixed‐dimensional nanohybrids, emphasizing their synergistic effects and novel functionalities. It also discusses multifunctional sensing platforms and the integration of machine learning for intelligent data analysis.
Xinyi Li, Yonghao Fu, Yuehe Lin, Dan Du
wiley   +1 more source

Interaction of an Archimedean spiral structure with orbital angular momentum light

New Journal of Physics, 2018
Complementing the research of surface plasmon polariton vortices for Archimedean spiral structures grooved in gold platelets, we here study the analogous positive structure of an Archimedean spiral consisting of bent gold nanorods. We consider spirals of
R M Kerber, J M Fitzgerald, X Xiao, S S Oh, S A Maier, V Giannini, D E Reiter   +6 more
doaj   +1 more source

Structured light transformations and orbital angular momentum control in a three-coil optical snake

Компьютерная оптика, 2022
In this paper, we studied transformations of structured light and its angular momentum in a three-coil optical snake – a coil resonator composed of 3 evanescently uniformly coupled coils of a multimode fiber. We have suggested a fully vectorial theory of
C.N. Alexeyev, S.S. Aliyeva, E.V. Barshak, B.P. Lapin, M.A. Yavorsrky   +4 more
doaj   +1 more source

Phase Change Material‐Driven Tunable Metasurface for Adaptive Terahertz Sensing and Communication in 6G Perceptive Networks

Advanced Functional Materials, EarlyView.
This study explores the benefits of metasurfaces made from functional materials, highlighting their ability to be adapted and improved for various high‐frequency applications, including communications and sensing. It first demonstrates the potential of these functional material‐based metasurfaces to advance the field of sub‐THz perceptive networks ...
Yat‐Sing To, Jiachen Du, Cyril Decroze, Laure Huitema, Aurelian Crunteanu, Hang Wong   +5 more
wiley   +1 more source

Narrow band amplification of light carrying orbital angular momentum

Optics Express, 2016
We report on the amplification of an optical vortex beam carrying orbital angular momentum via induced narrow Raman gain in an ensemble of cold cesium atoms. A 20% single-pass Raman gain of a weak vortex signal field is observed with a spectral width of order of 1 MHz, much smaller than the natural width, demonstrating that the amplification process ...
G. C. Borba, S. Barreiro, Laurence Pruvost, D. Felinto, J. W. R. Tabosa   +4 more
openaire   +3 more sources

The difficulty of measuring orbital angular momentum

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2011
Light can carry angular momentum as well as energy and momentum; the transfer of this angular momentum to an object results in an optical torque. The development of a rotational analogue to the force measurement capability of optical tweezers is hampered
D. Preece, T. A. Nieminen, T. Asavei, N. R. Heckenberg, H. Rubinsztein-Dunlop   +4 more
doaj   +1 more source

Generalized angle-orbital-angular-momentum Talbot effect [PDF]

EPJ Web of Conferences
Light containing twisted phase structures, i.e. light carrying orbital angular momenta (OAM), when propagating inside ring-core fibres leads to a complex interference dynamics resulting in the fundamental self-imaging phenomenon known as the Talbot ...
Fickler Robert
doaj   +1 more source

Structured 3D linear space–time light bullets by nonlocal nanophotonics

Light: Science & Applications, 2021
We propose the generation of 3D linear light bullets propagating in free space using a single passive nonlocal optical surface. The nonlocal nanophotonics can generate space–time coupling without any need for bulky pulse-shaping and spatial modulation ...
Cheng Guo, Meng Xiao, Meir Orenstein, Shanhui Fan   +3 more
doaj   +1 more source

Reconfigurable Metamirrors Based on Compliant Mechanisms

Advanced Functional Materials, EarlyView.
Providing the basis for numerous practical applications, the reconfigurability of metadevices is of great importance. Through the integration of controlled mechanical deformation with chiral meta‐atoms, a compliant mechanism based metamirror is demonstrated for active control over the polarization of electromagnetic waves.
Galestan Mackertich‐Sengerdy, Lei Kang, Sawyer D. Campbell, Douglas H. Werner   +3 more
wiley   +1 more source