期刊
NANOPHOTONICS
卷 9, 期 1, 页码 187-194出版社
WALTER DE GRUYTER GMBH
DOI: 10.1515/nanoph-2019-0377
关键词
halide perovskites; nanostructures; nanophotonics; nanoimprint lithography; THz generation
资金
- Ministry of Education and Science of the Russian Federation [16.8939.2017/8.9]
- Russian Science Foundation [19-73-30023]
- ITMO Fellowship Program
- Russian Science Foundation [19-73-30023] Funding Source: Russian Science Foundation
Lead halide perovskites were known to be a prospective family of materials for terahertz (THz) generation. On the other hand, perovskite nanostructures, nanoantennas, and metasurfaces allow tailoring perovskites optical characteristics, resulting in more efficient interaction with incident or emitted light. Moreover, the perovskites are robust materials against formation of defects caused by mechanical deformations and can be efficiently nanostructured by various high throughput methods. In this work, we have enhanced THz emission from MAPbI(3) perovskite upon femtosecond laser irradiation using nanoimprint lithography. The formed nanostructures not only improve absorption of the incident laser pulses, but also lead to a non-symmetric near-field distribution. As a result, we have enhanced the efficiency of THz emission from the nanostructured perovskite by 3.5 times as compared with a smooth perovskite film. Our results paved the way for a new application of large-scale perovskite nanostructuring, making halide perovskites competitive with more expensive conventional semiconductors for THz generation.
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