Photonic spin Hall effect in metasurfaces: a brief review

Liu, Yachao; Ke, Yougang; Luo, Hailu; Wen, Shuangchun

doi:10.1515/nanoph-2015-0155

Cited by 153 publications

(98 citation statements)

References 133 publications

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“…A cyclical evolution, e.g., the circle C in Figure 10d, results in a PB phase determined by the solid angle subtended by the circle. Similar properties can also be extended to more complex configurations, such as higher‐order Poincare sphere, orbital Poincare sphere, and hybrid‐order Poincare sphere 203. The PB phase also can be applied in TMDCs valley polarization to understand valley physics in cyclic adiabatic processes.…”

Section: Photonic Spin–orbit Interactionsmentioning

confidence: 97%

Section: Photonic Spin–orbit Interactionsmentioning

confidence: 99%

Section: Photonic Spin–orbit Interactionsmentioning

confidence: 99%

“…There are two types of geometric phases in optics: the Panchatantra–Berry (PB) geometric phase due to polarization change in SU(2) Poincaré space and the spin‐redirection geometric phase due to rotation of wavevector in SO(3) momentum space 203. The spin‐redirection geometric phase can be understood by considering the helical transport of light shown in Figure 10b, where the polarization state (electric‐field vector) e rotates with the propagation of the beam.…”

Section: Photonic Spin–orbit Interactionsmentioning

confidence: 99%

“…a) The SEM image of V‐shape antennas metasurface (same to Figure 6c left) and b) the corresponding phase change of the scattered electric field of the antennas. a,b) Reproduced with permission 203. Copyright 2017, Walter de Gruyter GmbH.…”

Section: Photonic Spin–orbit Interactionsmentioning

confidence: 99%

See 4 more Smart Citations

Chiral Coupling of Valley Excitons and Light through Photonic Spin–Orbit Interactions

Chen

Fan

et al. 2019

Advanced Optical Materials

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Spintronics employs the spin of electrons to encode information. Akin to spintronics, valleytronics exploits the valley as pseudospin‐carrying controllable binary information. 2D transition metal dichalcogenides (TMDCs) have asymmetric +K and −K valleys. The valley pseudospins of these materials can be manipulated by selective pumping, giving rise to valley‐dependent circularly polarized photoluminescence. The photonic spin–orbit interactions (SOIs) in nanophotonic systems allow the transformation or coupling of optical spin angular momentum to orbital angular momentum of light. Hybridizing 2D TMDC electronic systems with nanophotonic systems can open up an avenue for merging TMDC valley polarization and photonic SOIs to uncover new mechanisms of on‐chip optical information processing and transport. This review focuses on the fundamentals and implications of TMDC valley polarization, photonic SOI effects, and their chiral coupling in hybrid TMDCs–nanophotonic systems. First, the deterministic valley‐dependent optical properties of TMDCs and recent efforts in achieving large valley polarization contrast are reviewed. Then, various SOI effects in nanophotonic systems and their physical mechanisms are summarized. At the end, recent demonstrations of chiral coupling between TMDC valley excitons and light through spin‐direction locking at hybrid interfaces are highlighted.

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Section: Photonic Spin–orbit Interactionsmentioning

confidence: 97%

Section: Photonic Spin–orbit Interactionsmentioning

confidence: 99%

Section: Photonic Spin–orbit Interactionsmentioning

confidence: 99%

Section: Photonic Spin–orbit Interactionsmentioning

confidence: 99%

Section: Photonic Spin–orbit Interactionsmentioning

confidence: 99%

See 3 more Smart Citations

Chiral Coupling of Valley Excitons and Light through Photonic Spin–Orbit Interactions

Chen

Fan

et al. 2019

Advanced Optical Materials

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Probing the Photonic Spin–Orbit Interactions in the Near Field of Nanostructures

Sun

Bai

Wang

et al. 2019

Adv Funct Materials

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Photonic spin-orbit interactions (SOI) provide a new design paradigm of functional nanomaterials and nanostructures, and have especially accelerated advances in spin-orbit photonics. The berry phase or the geometric phase, a salient property of SOI, plays a vital role in this process. Thus, the char acterization of photonic SOI processes together with the Berry phase is highly demanded for studies such as the optical spinHall effect, spintovortex conversion, and Rashba effect. Here, a spinselective and phaseresolved near field microscopic method is proposed and experimentally demonstrated for realtime probing and direct visualization of photonic SOI at mesoscale, and a 3D tomographic technique for imaging the spatial evolutions of the optical phases is also properly realized. By analyzing a metallic metasurface as a spin tovortex conversion platform, the abrupt geometric phase and the spatially evolutional dynamic phases are directly measured and intuitively illustrated. This work provides a powerful tool for the study of spin-orbit phenomena in nearfield optics, and can hold the promise for directly exploring the spin dependent surface states in plasmonics and photonic topological insulators.

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Multistate Switching of Photonic Angular Momentum Coupling in Phase‐Change Metadevices

et al. 2020

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The coupling between photonic spin and orbital angular momenta is significantly enhanced at the subwavelength scale and has found a plethora of applications in nanophotonics. However, it is still a great challenge to make such kind of coupling tunable with multiple sates. Here, a versatile metasurface platform based on polyatomic phase‐change resonators is provided to realize multiple‐state switching of photonic angular momentum coupling. As a proof of concept, three coupling modes, namely, symmetric coupling, asymmetric coupling, and no coupling, are experimentally demonstrated at three different crystallization levels of structured Ge2Sb2Te5 alloy. In practical applications, coded information can be encrypted in asymmetric mode using the spin degree of freedom, while revealing misleading one without proper phase change or after excessive crystallinity. With these findings, this study may open an exciting direction for subwavelength electromagnetics with unprecedented compactness, allowing to envision applications in active nanophotonics and information security engineering.

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Photonic spin Hall effect in metasurfaces: a brief review

Cited by 153 publications

References 133 publications

Chiral Coupling of Valley Excitons and Light through Photonic Spin–Orbit Interactions

Chiral Coupling of Valley Excitons and Light through Photonic Spin–Orbit Interactions

Probing the Photonic Spin–Orbit Interactions in the Near Field of Nanostructures

Multistate Switching of Photonic Angular Momentum Coupling in Phase‐Change Metadevices

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