Two-Dimensional Bi2Sr2CaCu2O8+δ Nanosheets for Ultrafast Photonics and Optoelectronics

Guanyu Liu; Xiaozhi Bao; Weikang Dong; Qi Wei; Haoran Mu; Wenguo Zhu; Bingzhe Wang; Jianding Li; Babar Shabbir; Yuan Huang; Guichuan Xing; Jianhui Yu; Peng Gao; Huaiyu Shao; Xiangping Li; Qiaoliang Bao

doi:10.1021/acsnano.1c01567

Two-Dimensional Bi₂Sr₂CaCu₂O_8+δ Nanosheets for Ultrafast Photonics and Optoelectronics

ACS Nano. 2021 May 25;15(5):8919-8929. doi: 10.1021/acsnano.1c01567. Epub 2021 May 10.

Authors

Guanyu Liu¹, Xiaozhi Bao², Weikang Dong³, Qi Wei², Haoran Mu⁴, Wenguo Zhu⁵, Bingzhe Wang², Jianding Li², Babar Shabbir⁴, Yuan Huang⁶, Guichuan Xing², Jianhui Yu⁵, Peng Gao³, Huaiyu Shao², Xiangping Li¹, Qiaoliang Bao⁴

Affiliations

¹ Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, China.
² Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Macau SAR 999078, China.
³ International Center for Quantum Materials, and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, China.
⁴ Department of Materials Science and Engineering, and ARC Centre of Excellence in Future Low-Energy Electronics Technologies, Monash University, Clayton, Victoria 3800, Australia.
⁵ Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Educational Institutes, Jinan University, Guangzhou 510632, China.
⁶ Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.

PMID: 33969996
DOI: 10.1021/acsnano.1c01567

Abstract

Two-dimensional (2D) Bi₂Sr₂CaCu₂O_8+δ (BSCCO) is a emerming class of 2D materials with high-temperature superconductivity for which their electronic transport properties have been intensively studied. However, the optical properties, especially nonlinear optical response and the photonic and optoelectronic applications of normal state 2D Bi₂Sr₂CaCu₂O_8+δ (Bi-2212), have been largely unexplored. Here, the linear and nonlinear optical properties of mechanically exfoliated Bi-2212 thin flakes are systematically investigated. 2D Bi-2212 shows a profound plasmon absorption in near-infrared wavelength range with ultrafast carrier dynamics as well as tunable nonlinear absorption depending on the thickness. We demonstrated that 2D Bi-2212 can be applied not only as an effective mode-locker for ultrashort pulse generation but also as an active medium for infrared light detection due to its plasmon absorption. Our results may trigger follow up studies on the optical properties of 2D BSCCO and demonstrate potential opportunities for photonic and optoelectronic applications.

Keywords: BSCCO; mode-locking; nonlinear optical properties; photodetector; plasmon absorption.