期刊
SCIENTIFIC REPORTS
卷 6, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep39166
关键词
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资金
- Jiangsu Government Scholarship for Oversea Studies [JS-2014-318]
- Qing Lan Project, the Natural Science Foundation of Jiangsu Province [BK20141169]
- Natural Science Foundation of China [61107055]
- Materials Research Science and Engineering Center (NSF-MRSEC) of Northwestern University, USA [DMR-1121262]
Asymmetric transmission phenomenon has attracted tremendous research interest due to its potential applications in integrated photonic systems. Broadband asymmetric transmission (BAT) is a highly desirable but challenging functionality to achieve in the visible regime due to the limitation of material dispersion. In this paper, we propose and numerically demonstrate that a tapered-metal-grating structure (TMGS) can achieve high-contrast BAT spectra covering the entire visible region. The transmission efficiency reaches similar to 95% for the forward illumination and similar to 35% for the backward illumination at the same wavelengths, respectively, and the corresponding transmission ratio is larger than 2.5 over a broadband wavelength regime. Such a design with high performance suggests applications for unidirectional optical transmission, optical diode, and so on.
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