Saved in:
| Main Authors: | , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2410.18474 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866914986949869568 |
|---|---|
| author | Zhao, Jiaxin Fieramosca, Antonio Dini, Kevin Shang, Qiuyu Bao, Ruiqi Luo, Yuan Shen, Kaijun Zhao, Yang Su, Rui Perez, Jesus Zuniga Gao, Weibo Ardizzone, Vincenzo Sanvitto, Daniele Xiong, Qihua Liew, Timothy C. H. |
| author_facet | Zhao, Jiaxin Fieramosca, Antonio Dini, Kevin Shang, Qiuyu Bao, Ruiqi Luo, Yuan Shen, Kaijun Zhao, Yang Su, Rui Perez, Jesus Zuniga Gao, Weibo Ardizzone, Vincenzo Sanvitto, Daniele Xiong, Qihua Liew, Timothy C. H. |
| contents | Recent advancements in transition metal dichalcogenides (TMDs) have unveiled exceptional optical and electronic characteristics, opened up new opportunities, and provided a unique platform for exploring light-matter interactions under the strong coupling regime. The exploitation of exciton-polaritons, with their peculiar hybrid light-matter properties, for the development of spintronic customizable devices that enhance both the information capacity and functionality at ambient temperatures is often suggested as a promising route. However, although TMD polaritons have shown promising potential, the microscopic mechanisms leading to nonlinearities in TMD polaritons are complex and their spin-anisotropy, a crucial requirement for many proposed polaritonic devices, has been missing. Here, we demonstrate the absence of spin-anisotropic interaction in a monolayer WS2 microcavity (at room temperature) and show how spin-dependent interactions can be controlled and spin anisotropy recovered by engineering double WS2 layer structures with varied interlayer spacing. We attribute this phenomenon to a distinctive feature in exciton-polariton physics: layer-dependent polariton-phonon coupling. We use theoretical calculations of the phonon electrostatic potentials finding a drastically different coupling strength for single and double monolayer samples and discuss qualitatively how this explains the observed spin-anisotropic response. This is further consistent with experiments on multi WS2 layer samples and the identification of a critical separation distance, above which an effective single monolayer spin-anisotropic response is recovered, both in experiment and theory. Our work lays the groundwork for the development of spin-optronic polaritonic devices at room temperature. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_18474 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Room temperature spin-layer locking of exciton-polariton nonlinearities Zhao, Jiaxin Fieramosca, Antonio Dini, Kevin Shang, Qiuyu Bao, Ruiqi Luo, Yuan Shen, Kaijun Zhao, Yang Su, Rui Perez, Jesus Zuniga Gao, Weibo Ardizzone, Vincenzo Sanvitto, Daniele Xiong, Qihua Liew, Timothy C. H. Optics Recent advancements in transition metal dichalcogenides (TMDs) have unveiled exceptional optical and electronic characteristics, opened up new opportunities, and provided a unique platform for exploring light-matter interactions under the strong coupling regime. The exploitation of exciton-polaritons, with their peculiar hybrid light-matter properties, for the development of spintronic customizable devices that enhance both the information capacity and functionality at ambient temperatures is often suggested as a promising route. However, although TMD polaritons have shown promising potential, the microscopic mechanisms leading to nonlinearities in TMD polaritons are complex and their spin-anisotropy, a crucial requirement for many proposed polaritonic devices, has been missing. Here, we demonstrate the absence of spin-anisotropic interaction in a monolayer WS2 microcavity (at room temperature) and show how spin-dependent interactions can be controlled and spin anisotropy recovered by engineering double WS2 layer structures with varied interlayer spacing. We attribute this phenomenon to a distinctive feature in exciton-polariton physics: layer-dependent polariton-phonon coupling. We use theoretical calculations of the phonon electrostatic potentials finding a drastically different coupling strength for single and double monolayer samples and discuss qualitatively how this explains the observed spin-anisotropic response. This is further consistent with experiments on multi WS2 layer samples and the identification of a critical separation distance, above which an effective single monolayer spin-anisotropic response is recovered, both in experiment and theory. Our work lays the groundwork for the development of spin-optronic polaritonic devices at room temperature. |
| title | Room temperature spin-layer locking of exciton-polariton nonlinearities |
| topic | Optics |
| url | https://arxiv.org/abs/2410.18474 |