標題: | Tailoring excitonic states of van der Waals bilayers through stacking configuration, band alignment, and valley spin |
作者: | Hsu, Wei-Ting Lin, Bo-Han Lu, Li-Syuan Lee, Ming-Hao Chu, Ming-Wen Li, Lain-Jong Yao, Wang Chang, Wen-Hao Shih, Chih-Kang 交大名義發表 電子物理學系 National Chiao Tung University Department of Electrophysics |
公開日期: | 1-十二月-2019 |
摘要: | Excitons in monolayer semiconductors have a large optical transition dipole for strong coupling with light. Interlayer excitons in heterobilayers feature a large electric dipole that enables strong coupling with an electric field and exciton-exciton interaction at the cost of a small optical dipole. We demonstrate the ability to create a new class of excitons in hetero- and homobilayers that combines advantages of monolayer and interlayer excitons, i.e., featuring both large optical and electric dipoles. These excitons consist of an electron confined in an individual layer, and a hole extended in both layers, where the carrier-species-dependent layer hybridization can be controlled through rotational, translational, band offset, and valley-spin degrees of freedom. We observe different species of layer-hybridized valley excitons, which can be used for realizing strongly interacting polaritonic gases and optical quantum controls of bidirectional interlayer carrier transfer. |
URI: | http://dx.doi.org/10.1126/sciadv.aax7407 http://hdl.handle.net/11536/153650 |
ISSN: | 2375-2548 |
DOI: | 10.1126/sciadv.aax7407 |
期刊: | SCIENCE ADVANCES |
Volume: | 5 |
Issue: | 12 |
起始頁: | 0 |
結束頁: | 0 |
顯示於類別: | 期刊論文 |