https://scholars.lib.ntu.edu.tw/handle/123456789/636522
標題: | Chiroptical Response Inversion and Enhancement of Room-Temperature Exciton-Polaritons Using 2D Chirality in Perovskites | 作者: | Wang, Zhiyu Lin, Cheng Chieh Murata, Kei Kamal, Ahmad Syazwan Ahmad Lin, Bo Wei Chen, Mu Hsin Tang, Siyi Ho, Ya Lun Chen, Chia Chun CHUN-WEI CHEN Daiguji, Hirofumi Ishii, Kazuyuki Delaunay, Jean Jacques |
關鍵字: | 2D chiroptical effect | chiral perovskites | Fabry–Pérot cavities | room-temperature exciton-polaritons | 公開日期: | 1-一月-2023 | 卷: | 35 | 期: | 42 | 來源出版物: | Advanced Materials | 摘要: | Although chiral semiconductors have shown promising progress in direct circularly polarized light (CPL) detection and emission, they still face potential challenges. A chirality-switching mechanism or approach integrating two enantiomers is needed to discriminate the handedness of a given CPL; additionally, a large material volume is required for sufficient chiroptical interaction. These two requirements pose significant obstacles to the simplification and miniaturization of the devices. Here, room-temperature chiral polaritons fulfilling dual-handedness functions and exhibiting a more-than-two-order enhancement of the chiroptical signal are demonstrated, by embedding a 40 nm-thick perovskite film with a 2D chiroptical effect into a Fabry–Pérot cavity. By mixing chiral perovskites with different crystal structures, a pronounced 2D chiroptical effect is accomplished in the perovskite film, featured by an inverted chiroptical response for counter-propagating CPL. This inversion behavior matches the photonic handedness switch during CPL circulation in the Fabry–Pérot cavity, thus harvesting giant enhancement of the chiroptical response. Furthermore, affected by the unique quarter-wave-plate effects, the polariton emission achieves a chiral dissymmetry of ±4% (for the emission from the front and the back sides). The room-temperature polaritons with the strong dissymmetric chiroptical interaction shall have implications on a fundamental level and future on-chip applications for biomolecule analysis and quantum computing. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/636522 | ISSN: | 09359648 | DOI: | 10.1002/adma.202303203 |
顯示於: | 材料科學與工程學系 |
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