Short-Wave Near-Infrared Linear Dichroism of Two-Dimensional Germanium Selenide

	Short-Wave Near-Infrared Linear Dichroism of Two-Dimensional Germanium Selenide
	Wang, Xiaoting 1,2; Li, Yongtao 1,2; Huang, Le 1,2; Jiang, Xiang-Wei 1,2; Jiang, Lang 3; Dong, Huanli 3; Wei, Zhongming 1,2; Li, Jingbo 1,2; Hu, Wenping 3,4,5
刊名	JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
	2017-10-25
卷号	139 期号:42 页码:14976-14982
英文摘要	Polarized detection has been brought into operation for optics applications in the visible band. Meanwhile, an advanced requirement in short-wave near-infrared (SW-NIR) (700-1100 nm) is proposed. Typical IV-VI chalcogenides-2D GeSe with anisotropic layered orthorhombic structure and narrow 1.1-1.2 eV band gap-potentially meets the demand. Here we report the unusual angle dependences of Raman spectra on high-quality GeSe crystals. The polarization-resolved absorption spectra (400-950 nm) and polarization-sensitive photodetectors (532, 638, and 808 nm) both exhibited well reproducible cycles, distinct anisotropic features, and typical absorption ratios alpha(y)/alpha(x) approximate to 1.09 at 532 nm, 1.26 at 638 nm, and 3.02 at 808 nm (the dichroic ratio I-py/I-px approximate to 1.09 at 532 nm, 1.44 at 638 nm, 2.16 at 808 nm). Obviously, the polarized measurement for GeSe showed superior anisotropic response at around 808 nm within the SW-NIR band. Besides, the two testing methods have demonstrated the superior reliability for each other. For the layer dependence of linear dichroism, the GeSe samples with different thicknesses measured under both 638 and 808 nm lasers identify that the best results can be achieved at a moderate thickness about 8-16 nm. Overall, few-layer GeSe has capacity with the integrated SW-NIR optical applications for polarization detection.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/39142]
专题	化学研究所_有机固体实验室
作者单位	1.Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China 2.Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 4.Tianjin Univ, Sch Sci, Dept Chem, Tianjin Key Lab Mol Optoelect Sci, Tianjin 300072, Peoples R China 5.Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiaoting,Li, Yongtao,Huang, Le,et al. Short-Wave Near-Infrared Linear Dichroism of Two-Dimensional Germanium Selenide[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2017,139(42):14976-14982.
APA	Wang, Xiaoting.,Li, Yongtao.,Huang, Le.,Jiang, Xiang-Wei.,Jiang, Lang.,...&Hu, Wenping.(2017).Short-Wave Near-Infrared Linear Dichroism of Two-Dimensional Germanium Selenide.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,139(42),14976-14982.
MLA	Wang, Xiaoting,et al."Short-Wave Near-Infrared Linear Dichroism of Two-Dimensional Germanium Selenide".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 139.42(2017):14976-14982.