Optical properties of monolayer bismuthene in electric fields

被引：11

作者：

Chen, Rong-Bin ^{[1
]}

Jang, Der-Jun ^{[2
]}

Lin, Ming-Chieh ^{[3
]}

Lin, Ming-Fa ^{[4
]}

机构：

[1] Natl Kaohsiung Univ Sci & Technol, Ctr Gen Studies, Kaohsiung 811, Taiwan

[2] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 804, Taiwan

[3] Hanyang Univ, Dept Elect & Biomed Engn, Multidisciplinary Computat Lab, Seoul 04763, South Korea

[4] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan

来源：

OPTICS LETTERS | 2018年 / 43卷 / 24期

基金：

新加坡国家研究基金会;

关键词：

ANTIMONENE;

D O I：

10.1364/OL.43.006089

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Optical excitations of monolayer bismuthene present very rich and unique absorption spectra. The optical energy gap corresponding to the threshold frequency is not equal to an indirect energy gap, and it becomes zero under the critical electric field. The frequency, number, intensity, and form of the absorption structures are dramatically changed when an external electric field is applied. The prominent peaks and the observable shoulders, respectively, arise from the constant-energy loop and the band-edge states of parabolic dispersions. These directly reflect the unusual electronic properties, being very different from those in monolayer graphene. The novel optical properties of bismuthine that are easily manipulated by electric fields may find a lot of various applications in optoelectronics, either combined with or complementary to those graphene-based systems. (c) 2018 Optical Society of America

引用

页码：6089 / 6092

页数：4

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