TY - JOUR
T1 - Highly Sensitive Polarization Photodetection Using a Pseudo-One-Dimensional Nb (1- x) Ti x S 3 Alloy
AU - Yang, Shengxue
AU - Wu, Minghui
AU - Shen, Wanfu
AU - Huang, Li
AU - Tongay, Sefaattin
AU - Wu, Kedi
AU - Wei, Bin
AU - Qin, Ying
AU - Wang, Zhongchang
AU - Jiang, Chengbao
AU - Hu, Chunguang
N1 - Funding Information:
S.Y., M.W., and W.S. contributed equally to this work. S.Y. is supported by the National Natural Science Foundation of China (NSFC) under grant no. 51602014. C.J. is supported by the NSFC under grant no. 51331001 and the Key Natural Science Foundation of Beijing no. 2151002. C.H. is supported by the NSFC (grant no. 61008028) and the National key research and development program (2017YFF0107003). Z.W. acknowledges support by the NSFC under grant nos. 51728202, 11332013, 51502092 and the Program for Professor of Special Appointment (Eastern Scholar ) at Shanghai Institutions of Higher Learning (TP2015028). L.H. acknowledges support by the NSFC (grant no. 11774142) and Shenzhen Peacock Plan Team under grant no. KQTD2016022619565991. S.T. acknowledges funding support from NSF DMR-1552220.
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2019/1/23
Y1 - 2019/1/23
N2 - Low-symmetry layered two-dimensional (2D) materials with strong in-plane optical anisotropy can potentially be applied for polarization photodetection. This is especially true for those 2D materials with a direct band gap, which can efficiently absorb light with specific axial polarization. However, discovering such new anisotropic 2D materials with a direct band structure is still extremely challenging. Here, we fabricate a photodetector using a pseudo-one-dimensional (pseudo-1D) Nb (1-x) Ti x S 3 alloy device and demonstrate that it is highly sensitive to the polarized light because of the strong in-plane optical anisotropy and direct band gap of the alloy by combining angle-resolved polarization Raman spectroscopy, azimuth-dependent reflectance difference microscopy, polarization-dependent absorption spectroscopy, and hybrid functional theory calculations. As a consequence, the polarization photodetector of the Nb (1-x) Ti x S 3 alloy shows a large photocurrent anisotropic ratio and a high photoresponse. The choice of a low-symmetry layered pseudo-1D Nb (1-x) Ti x S 3 alloy in polarization photodetection might open up new functionalities for novel optoelectronic device applications.
AB - Low-symmetry layered two-dimensional (2D) materials with strong in-plane optical anisotropy can potentially be applied for polarization photodetection. This is especially true for those 2D materials with a direct band gap, which can efficiently absorb light with specific axial polarization. However, discovering such new anisotropic 2D materials with a direct band structure is still extremely challenging. Here, we fabricate a photodetector using a pseudo-one-dimensional (pseudo-1D) Nb (1-x) Ti x S 3 alloy device and demonstrate that it is highly sensitive to the polarized light because of the strong in-plane optical anisotropy and direct band gap of the alloy by combining angle-resolved polarization Raman spectroscopy, azimuth-dependent reflectance difference microscopy, polarization-dependent absorption spectroscopy, and hybrid functional theory calculations. As a consequence, the polarization photodetector of the Nb (1-x) Ti x S 3 alloy shows a large photocurrent anisotropic ratio and a high photoresponse. The choice of a low-symmetry layered pseudo-1D Nb (1-x) Ti x S 3 alloy in polarization photodetection might open up new functionalities for novel optoelectronic device applications.
KW - Nb Ti S ternary alloy
KW - in-plane optical anisotropy
KW - low-symmetry structure
KW - polarization-sensitive photodetector
KW - pseudo-one-dimensional materials
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U2 - 10.1021/acsami.8b19050
DO - 10.1021/acsami.8b19050
M3 - Article
C2 - 30586287
AN - SCOPUS:85060036685
SN - 1944-8244
VL - 11
SP - 3342
EP - 3350
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
IS - 3
ER -