Results 91 to 100 of about 18,170 (189)

Quantum spin Hall effect in bound states in continuum [PDF]

, 2019
Moving the polarization of the incident wave along a meridian of the Poincaré sphere, experimentally we show that the coupling with the fundamental Bloch's surface waves of the mode, provide a spatially coherent, macroscopic spinmomentum locked ...
Cabrini, S, Calafiore, G, De Luca, AC, Mocella, V, Penzo, E, Romano, S, Zito, G   +6 more
core  

Tunable optical spatial differentiation in the photonic spin Hall effect

Optics Express, 2020
Optical differential operation and image edge detection have shown some unique advantages, including faster operating speeds and lower power consumption, compared to a digital image processor. Here, we examine the origin of optical differentiator in the photonic spin Hall effect.
Chengquan, Mi, Wanye, Song, Xiang, Cai, Chunxia, Yang, Yujun, Song, Xianwu, Mi   +5 more
openaire   +2 more sources

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

Ultrasensitive and real-time detection of chemical reaction rate based on the photonic spin Hall effect

APL Photonics, 2020
A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. However, the precise and real-time detection of the reaction rate remains challenging due to its fast and dynamical process.
Ruisi Wang, Junxiao Zhou, Kuiming Zeng, Shizhen Chen, Xiaohui Ling, Weixing Shu, Hailu Luo, Shuangchun Wen   +7 more
doaj   +1 more source

Giant Spin Hall Effect in Single Photon Plasmonics

, 2012
We show the existence of a very large spin Hall effect of light (SHEL) in single photon plasmonics based on spontaneous emission and the dipole-dipole interaction initiated energy transfer (FRET) on plasmonic platforms. The spin orbit coupling inherent in Maxwell equations is seen in the conversion of sigma + photon to sigma - photon.
Agarwal, G. S., Biehs, S. -A.
openaire   +2 more sources

Ultralow‐Backscattering Induced Mode Splitting in Chipscale Valley Photonic Topological Cavities

Laser &Photonics Reviews, EarlyView.
The proposed in‐situ metrology based on mode splitting quantifies the ultralow backscattering of topological valley edge states at a single sharp corner, demonstrating near‐lossless topological transport (0.09 dB/corner) on a silicon chip. This work provides insight into the robustness of the photonic valley system and shows the great potential of ...
Kaiji Chen, Wenhao Wang, Yi Ji Tan, Zhonglei Shen, Ridong Jia, Ranjan Singh   +5 more
wiley   +1 more source

Weak-value amplification for Weyl-point separation in momentum space

New Journal of Physics, 2018
The existence of Weyl nodes in the momentum space is a hallmark of a Weyl semimetal (WSM). A WSM can be confirmed by observing its Fermi arcs with separated Weyl nodes.
Shizhen Chen, Chengquan Mi, Weijie Wu, Wenshuai Zhang, Weixing Shu, Hailu Luo, Shuangchun Wen   +6 more
doaj   +1 more source

Controlling Collective Quasiparticle Dynamics Beyond Decoherence in Topological Interfaces

Laser &Photonics Reviews, EarlyView.
Gold nanoparticles placed above a deformed honeycomb plasmonic crystal couple to a chiral topological interface mode. The pseudospin‐split bands ψ+/ ψ− encode spin‐momentum locking, so emitters radiate directionally along the domain wall and share a common phase.
Fatemeh Davoodi
wiley   +1 more source

Black phosphorus terahertz sensing based on photonic spin Hall effect

Optics Express, 2020
A novel terahertz (THz) sensing scheme is proposed based on the photonic spin Hall effect (PSHE). By illumining a paraxial Gaussian THz beam onto a black phosphorus (BP)-based Tamm structure, the reflected beam will undergo in-plane spin splitting, i.e., the centroids of two opposite spin components separate spatially.
Zhu, Wenguo, Xu, Huanqi, Pan, Jintao, Zhang, Shuang, Zheng, Huadan, Zhong, Yongchun, Yu, Jianhui, Chen, Zhe   +7 more
openaire   +2 more sources

Structural and magnetic investigations of the Weyl semimetal family CeAlSi1–xGex

Acta Crystallographica Section B, EarlyView.
A systematic investigation is reported of the structural and magnetic evolution in the CeAlSi1–xGex series, combining X‐ray and neutron diffraction with magnetization measurements on polycrystalline samples and single crystals. Chemical substitution leads to a continuous lattice expansion and a suppression of the ferromagnetic ordering temperature ...
Daniel A. Mayoh, Sanjay Sharma, Thomas W. Chamberlain, George D. A. Wood, Ivan da-Silva, Paul A. Goddard, Martin R. Lees, Geetha Balakrishnan   +7 more
wiley   +1 more source