Bismuth bromide (α-Bi4Br4) can demonstrate various exotic topological states, including higher-order topological insulator with hinge states and quantum spin Hall insulator with helical edge states. To date, α-Bi4Br4 nanowires can be obtained by using the exfoliation method from the bulk. However, it is still a great challenge to efficiently prepare α-Bi4Br4 nanowires suitable for potential applications, e.g., saturable absorber in ultrafast pulsed fiber lasers. Here, we report the controllable growth of α-Bi4Br4 thin films consisting of nanowires via molecular beam epitaxy technique. We show that the morphology of the α-Bi4Br4 nanowires depends on the growth temperature and BiBr3 flux. In addition, we also achieve α-Bi4Br4 nanowires on NbSe2 and gold substrates. Furthermore, we performed the saturable absorption property of α-Bi4Br4 thin films with a modulation depth of 21.58% and mode-locking at 1556.4 nm with a pulse width of 375 fs in the pulsed fiber lasers. Those results demonstrate the synthesis of quasi-1D topological material α-Bi4Br4, which is expected to be used for the fundamental research of topological physics and potential applications in optical devices.
Skip Nav Destination
Article navigation
28 February 2022
Research Article|
March 03 2022
Controllable epitaxy of quasi-one-dimensional topological insulator α-Bi4Br4 for the application of saturable absorber
Special Collection:
One-Dimensional van der Waals Materials
Xu Zhang
;
Xu Zhang
1
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement, Ministry of Education, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
2
Yangtze Delta Region Academy of Beijing Institute of Technology
, Jiaxing 314000, China
3
Beijing Key Lab of Nanophotonics & Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
Search for other works by this author on:
Xiaowei Xing
;
Xiaowei Xing
4
State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications
, Beijing 100876, China
Search for other works by this author on:
Ji Li;
Ji Li
1
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement, Ministry of Education, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
3
Beijing Key Lab of Nanophotonics & Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
Search for other works by this author on:
Xianglin Peng;
Xianglin Peng
1
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement, Ministry of Education, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
3
Beijing Key Lab of Nanophotonics & Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
Search for other works by this author on:
Lu Qiao;
Lu Qiao
1
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement, Ministry of Education, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
3
Beijing Key Lab of Nanophotonics & Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
Search for other works by this author on:
Yuxiang Liu;
Yuxiang Liu
1
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement, Ministry of Education, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
2
Yangtze Delta Region Academy of Beijing Institute of Technology
, Jiaxing 314000, China
Search for other works by this author on:
Xiaolu Xiong;
Xiaolu Xiong
1
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement, Ministry of Education, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
3
Beijing Key Lab of Nanophotonics & Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
Search for other works by this author on:
Junfeng Han
;
Junfeng Han
a)
1
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement, Ministry of Education, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
2
Yangtze Delta Region Academy of Beijing Institute of Technology
, Jiaxing 314000, China
3
Beijing Key Lab of Nanophotonics & Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
a)Authors to whom correspondence should be addressed: pkuhjf@bit.edu.cn; jungliu@bupt.edu.cn; and wdxiao@bit.edu.cn
Search for other works by this author on:
Wenjun Liu
;
Wenjun Liu
a)
4
State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications
, Beijing 100876, China
a)Authors to whom correspondence should be addressed: pkuhjf@bit.edu.cn; jungliu@bupt.edu.cn; and wdxiao@bit.edu.cn
Search for other works by this author on:
Wende Xiao;
Wende Xiao
a)
1
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement, Ministry of Education, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
3
Beijing Key Lab of Nanophotonics & Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
a)Authors to whom correspondence should be addressed: pkuhjf@bit.edu.cn; jungliu@bupt.edu.cn; and wdxiao@bit.edu.cn
Search for other works by this author on:
Yugui Yao
Yugui Yao
1
Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement, Ministry of Education, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
2
Yangtze Delta Region Academy of Beijing Institute of Technology
, Jiaxing 314000, China
3
Beijing Key Lab of Nanophotonics & Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology
, Beijing 100081, China
Search for other works by this author on:
a)Authors to whom correspondence should be addressed: pkuhjf@bit.edu.cn; jungliu@bupt.edu.cn; and wdxiao@bit.edu.cn
Note: This paper is part of the APL Special Collection on One-Dimensional van der Waals Materials.
Appl. Phys. Lett. 120, 093103 (2022)
Article history
Received:
December 30 2021
Accepted:
February 17 2022
Citation
Xu Zhang, Xiaowei Xing, Ji Li, Xianglin Peng, Lu Qiao, Yuxiang Liu, Xiaolu Xiong, Junfeng Han, Wenjun Liu, Wende Xiao, Yugui Yao; Controllable epitaxy of quasi-one-dimensional topological insulator α-Bi4Br4 for the application of saturable absorber. Appl. Phys. Lett. 28 February 2022; 120 (9): 093103. https://doi.org/10.1063/5.0083807
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Sign in via your Institution
Sign in via your InstitutionPay-Per-View Access
$40.00