Synthesis of low-symmetry 2D Ge(1-: X)SnxSe2 alloy flakes with anisotropic optical response and birefringence

Liu, Yijun1; Wu, Minghui2; Sun, Zhaoyang3; Yang, Shengxue1; Hu, Chunguang3; Huang, Li2; Shen, Wanfu3; Wei, Bin4; Wang, Zhongchang4; Yang, Shiqi5; Ye, Yu5; Li, Yan6; Jiang, Chengbao1

2019

10.1039/c9nr07820g

Nanoscale   影响因子和分区

20403372

2040-3372

Low-symmetry two-dimensional (2D) materials with unique in-plane anisotropy can promote both fundamental science and practical applications in optics, optoelectronics, electronics, and polarization detection. As a member of 2D materials, doping/alloying material systems have gained great attention owing to the tunable bandgap and special properties. However, the in-plane anisotropic optical and electrical properties of these 2D alloy materials have rarely been reported. In this work, low-symmetry 2D Ge(1-x)SnxSe2 (x = 0-1.0) alloy flakes have been synthesized by chemical vapor deposition (CVD) with a bandgap varying from 1.55 eV (GeSe2, x = 0) to 1.90 eV (SnSe2, x = 1.0). Angle-resolved polarized Raman spectroscopy (ARPRS) is used to confirm the in-plane vibrational anisotropy, and azimuth-dependent reflectance difference microscopy (ADRDM) is applied to visualize the in-plane optical anisotropy. Polarization-dependent transmission spectroscopy (PDTS) is carried out to reflect the in-plane absorptional anisotropy and linear dichroism, and birefringence characteristics are also found in the subsequent studies. All of the results indicate the unique in-plane optical anisotropy and birefringence characteristics of the 2D Ge(1-x)SnxSe2 alloy flakes, providing new opportunities for polarization-controlled devices, optical wave plates, and polarizers.
© The Royal Society of Chemistry.

EI ; SCI

英语

其他

National Natural Science Foundation of China[51602014] ; National Natural Science Foundation of China[51972007]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000506883100004

Royal Society of Chemistry

20195107880847

Birefringence ; Dichroism ; Energy gap ; Optical anisotropy ; Polarization

Light/Optics:741.1 ; Chemical Reactions:802.2

EV Compendex

1.School of Materials Science and Engineering, Beihang University, Beijing; 100191, China
2.Department of Physics, Southern University of Science and Technology, Shenzhen; 518005, China
3.State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University Weijin Road, Tianjin; CN-300072, China
4.Department of Quantum and Energy Materials, International Iberian Nanotechnology Laboratory (INL), Av. Mestre José Veiga s/n, Braga; 4715-330, Portugal
5.State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Nano-optoelectronics Frontier Center of the Ministry of Education, Peking University, Beijing; 100871, China
6.State Key Laboratory for Mechanical Behavior of Materials, Xi'An Jiaotong University, Xi'an Shanxi; 710049, China

Liu, Yijun,Wu, Minghui,Sun, Zhaoyang,et al. Synthesis of low-symmetry 2D Ge(1-: X)SnxSe2 alloy flakes with anisotropic optical response and birefringence[J]. Nanoscale,2019,11(48):23116-23125.

Liu, Yijun.,Wu, Minghui.,Sun, Zhaoyang.,Yang, Shengxue.,Hu, Chunguang.,...&Jiang, Chengbao.(2019).Synthesis of low-symmetry 2D Ge(1-: X)SnxSe2 alloy flakes with anisotropic optical response and birefringence.Nanoscale,11(48),23116-23125.

Liu, Yijun,et al."Synthesis of low-symmetry 2D Ge(1-: X)SnxSe2 alloy flakes with anisotropic optical response and birefringence".Nanoscale 11.48(2019):23116-23125.