Topological polaritons, combining the robustness of the topologically protected edge states against defects and disorder with the strong nonlinear properties of polariton bosons, represent an excellent platform to investigate novel photonic topological phases. We demonstrate the optical spin Hall effect (OSHE) and its symmetry switching in the exciton-polariton regime of pure DPAVBi crystals. Benefiting from the photonic Rashba-Dresselhaus spin-orbit coupling, we observe the separation of left- and right-circularly polarized emission in momentum space and real space, a signature of the OSHE. Above the lasing threshold, the OSHE pattern changes due to transverse quantization in the microbelt. This simple device has great potential applications in topological polaritons, such as information transmission, photonic integrated chips, and quantum information.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/jacs.4c15894 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Switching on and off the spin polarization of the conduction band in antiferromagnetic bilayer transistors.
Nat Nanotechnol
March 2025
Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland.
Antiferromagnetic conductors with suitably broken spatial symmetries host spin-polarized bands, which lead to transport phenomena commonly observed in metallic ferromagnets. In bulk materials, it is the given crystalline structure that determines whether symmetries are broken and spin-polarized bands are present. Here we show that, in the two-dimensional limit, an electric field can control the relevant symmetries.
View Article and Find Full Text PDFUltrafast Spin Rotation of Relativistic Lepton Beams via Terahertz Wave in a Dielectric-Lined Waveguide.
Phys Rev Lett
February 2025
Xi'an Jiaotong University, Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an 710049, China.
Spin rotation is central for the spin manipulation of lepton beams which, in turn, plays an important role in investigation of the properties of spin-polarized lepton beams and the examination of spin-dependent interactions. However, realization of compact and ultrafast spin rotation of lepton beams, between longitudinal and transverse polarizations, still faces significant challenges. Here, we put forward a novel method for ultrafast (picosecond timescale) spin rotation of a relativistic lepton beam via employing a moderate-intensity terahertz (THz) wave in a dielectric-lined waveguide (DLW).
View Article and Find Full Text PDFLarge Tunneling Magnetoresistance in Nonvolatile 2D Hybrid Spin Filters.
Phys Rev Lett
February 2025
Xi'an Jiaotong University, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Advanced Materials and Mesoscopic Physics, School of Physics, Xi'an 710049, China.
Ferromagnetic semiconductors offer an efficient way to achieve high spin polarization via spin filtering effect. Large tunneling magnetoresistance (TMR) can then be realized when multiple spin filters are put in series, as recently demonstrated in van der Waals 2D A-type antiferromagnets such as CrI_{3} and CrSBr. However, the interlayer antiferromagnetic ground state of these magnets inherently results in a high resistance state at zero field, and this volatile behavior limits potential applications.
View Article and Find Full Text PDFInfrared Magnetopolaritons in MoTe_{2} Monolayers and Bilayers.
Phys Rev Lett
February 2025
Carl von Ossietzky Universität Oldenburg, Institut für Physik, Fakultät V, 26129 Oldenburg, Germany.
MoTe_{2} monolayers and bilayers are unique within the family of van der Waals materials since they pave the way toward atomically thin infrared light-matter quantum interfaces, potentially reaching the important telecommunication windows. Here, we report emergent exciton polaritons based on MoTe_{2} monolayers and bilayers in a low-temperature open microcavity in a joint experiment-theory study. Our experiments clearly evidence both the enhanced oscillator strength and enhanced luminescence of MoTe_{2} bilayers, signified by a 38% increase of the Rabi splitting and a strongly enhanced relaxation of polaritons to low-energy states.
View Article and Find Full Text PDFModulating Nanometric Spin Spiral States via Spontaneous Lattice Distortion in a Short Period Helimagnet MnCoSi.
ACS Nano
March 2025
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
We report the influence of spontaneous lattice distortion on the helical spin spiral states in centrosymmetric helimagnet MnCoSi. With the help of in situ Lorentz transmission electron microscopy, we observed significant distortion─up to 57%─in the helical spin order of MnCoSi thin lamella samples. Our analysis, integrating density functional theory calculations with micromagnetic simulations, confirmed that the spontaneous lattice distortion is induced by the variation in the specimen thickness, which therefore modulates the nearest-neighbor exchange interaction and the next-nearest-neighbor exchange interaction , leading to a change in the spin rotational periodicity.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!