Long Range Coherent Valley Pseudospin Transport via Bloch Surface Wave Polaritons in Monolayer Transition Metal Dichalcogenides

IF 6 1区物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Photonics Pub Date : 2026-09-30 DOI:10.1021/acsphotonics.6c00182

Zhengyang Lyu,Haonan Zhao,Bin Liu,Claire E. Arneson,Lingxiao Zhou,Chenxi Liu,Yuhan Zhang,Stephen R. Forrest,Parag B. Deotare

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Abstract

Abstract The feasibility of low-dimensional transition metal dichalcogenides (TMDs) as a platform for valleytronics relies on the ability to control the dynamics of the valley pseudospins. Here, we present long-range coherent valley pseudospin transport assisted by Bloch surface wave exciton-polaritons (BSWPs). We resolve the BSWP transport in exfoliated WS2 over distances exceeding 10 μm in both spatial and polarization spaces via momentum-selected circular dichroism spectroscopy at cryogenic temperatures. We show that the trajectories on the Poincaré sphere reflect hybrid light–matter polarization dynamics. Furthermore, we show that the BSWP transport can be optically or magnetically controlled through the photonic or the excitonic component. Our work demonstrates the ability to coherently transport valley pseudospin information over long distances and establishes the feasibility of an all-axis controllable quantum system in the spatial, spectral, momentum, and polarization domains.

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单层过渡金属二硫族化合物表面波极化子的长距离相干谷伪自旋输运

低维过渡金属二硫族化合物（TMDs）作为谷电子平台的可行性依赖于控制谷假自旋动力学的能力。在这里，我们提出了由布洛赫表面波激子-极化子（BSWPs）辅助的远程相干谷伪自旋输运。我们利用动量选择的圆二色光谱在低温条件下，在空间和偏振空间中解析了脱落的WS2中超过10 μm距离的BSWP输运。我们证明了庞加莱球上的轨迹反映了光-物质混合偏振动力学。此外，我们还证明了BSWP输运可以通过光子或激子组分进行光学或磁控制。我们的工作证明了在长距离上相干输运谷伪自旋信息的能力，并建立了在空间、光谱、动量和极化领域的全轴可控量子系统的可行性。

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来源期刊

ACS Photonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

11.90

自引率

5.70%

发文量

438

审稿时长

2.3 months

期刊介绍： Published as soon as accepted and summarized in monthly issues, ACS Photonics will publish Research Articles, Letters, Perspectives, and Reviews, to encompass the full scope of published research in this field.