Geometric filterless photodetectors for mid-infrared spin light

doi:10.1038/s41566-022-01115-7

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	Geometric filterless photodetectors for mid-infrared spin light
	J. Wei; Y. Chen; Y. Li; W. Li; J. Xie; C. Lee; K. S. Novoselov and C.-W. Qiu
	2022
ISSN号	17494885
DOI	10.1038/s41566-022-01115-7
英文摘要	Free-space circularly polarized light (CPL) detection, requiring polarizers and wave plates, is well established, but such a spatial degree of freedom is unfortunately absent in integrated on-chip optoelectronics. The filterless CPL photodetectors reported so far suffer from an intrinsic small discrimination ratio, vulnerability to the non-CPL field components and low responsivity. Here we report a distinct paradigm of geometric photodetectors in the mid-infrared, exhibiting a substantial discrimination ratio of 84, a close-to-perfect CPL-specific response, a zero-bias responsivity of 392 V W1 at room temperature and a detectivity of ellipticity down to 0.03 Hz1/2. Our approach makes use of a plasmonic nanostructures array with judiciously designed symmetry, assisted by graphene ribbons, to electrically read their near-field optical information. This geometry-empowered recipe for infrared photodetectors provides a robust, direct, strict and high-quality solution to on-chip filterless CPL detection and unlocks new opportunities for integrated functional optoelectronic devices. 2022, The Author(s), under exclusive licence to Springer Nature Limited.
URL标识	查看原文
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/66694]
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	J. Wei,Y. Chen,Y. Li,et al. Geometric filterless photodetectors for mid-infrared spin light[J],2022.
APA	J. Wei.,Y. Chen.,Y. Li.,W. Li.,J. Xie.,...&K. S. Novoselov and C.-W. Qiu.(2022).Geometric filterless photodetectors for mid-infrared spin light..
MLA	J. Wei,et al."Geometric filterless photodetectors for mid-infrared spin light".(2022).