Direct Light Orbital Angular Momentum Detection in Mid-Infrared Based on the Type-II Weyl Semimetal TaIrTe4

doi:10.1002/adma.202201229

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	Direct Light Orbital Angular Momentum Detection in Mid-Infrared Based on the Type-II Weyl Semimetal TaIrTe4
	J. W. Lai; J. C. Ma; Z. P. Fan; X. M. Song; P. Yu; Z. Liu; P. Zhang; Y. Shi; J. L. Cheng and D. Sun
刊名	Advanced Materials
	2022
卷号	34 期号:29 页码:9
ISSN号	0935-9648
DOI	10.1002/adma.202201229
英文摘要	The direct photocurrent detection capability of light orbital angular momentum (OAM) has recently been realized with topological Weyl semimetals, but it is limited to the near-infrared wavelength range. The extension of the direct OAM detection capability to the mid-infrared band, which is a wave band that plays an important role in a vast range of applications, has not yet been realized. This is because the photocurrent responses of most photodetectors are neither sensitive to the phase information nor efficient in the mid-infrared region. In this study, a photodetector based on the type-II Weyl semimetal tantalum iridium telluride (TaIrTe4) is designed with peculiar electrode geometries to directly detect the topological charge of the OAM using the orbital photogalvanic effect (OPGE). The results indicate that the helical phase gradient of light can be distinguished by a current winding around the optical beam axis, with a magnitude proportional to its quantized OAM mode number. The topologically enhanced responses in the mid-infrared region of TaIrTe4 further help overcome the low responsivity issues and finally render direct OAM detection capability. This study enables on-chip-integrated OAM detection, and thus OAM-sensitive focal plane arrays in the mid-infrared region.
URL标识	查看原文
语种	英语
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/66565]
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. W. Lai,J. C. Ma,Z. P. Fan,et al. Direct Light Orbital Angular Momentum Detection in Mid-Infrared Based on the Type-II Weyl Semimetal TaIrTe4[J]. Advanced Materials,2022,34(29):9.
APA	J. W. Lai.,J. C. Ma.,Z. P. Fan.,X. M. Song.,P. Yu.,...&J. L. Cheng and D. Sun.(2022).Direct Light Orbital Angular Momentum Detection in Mid-Infrared Based on the Type-II Weyl Semimetal TaIrTe4.Advanced Materials,34(29),9.
MLA	J. W. Lai,et al."Direct Light Orbital Angular Momentum Detection in Mid-Infrared Based on the Type-II Weyl Semimetal TaIrTe4".Advanced Materials 34.29(2022):9.