Optical properties and applications for MoS2-Sb2Te3-MoS2 heterostructure materials
Two-dimensional (2D) materials with potential applications in photonic and optoelectronic devices have attracted increasing attention due to their unique structures and captivating properties. However, generation of stable high-energy ultrashort pulses requires further boosting of these materials’ optical properties, such as higher damage threshold and larger modulation depth. Here we investigate a new type of heterostructure material with uniformity by employing the magnetron sputtering technique. Heterostructure materials are synthesized with van der Waals heterostructures consisting of MoS2 and Sb2Te3. The bandgap, carrier mobility, and carrier concentration of the MoS2-Sb2Te3-MoS2 heterostructure materials are calculated theoretically. By using these materials as saturable absorbers (SAs), applications in fiber lasers with Q-switching and mode-locking states are demonstrated experimentally. The modulation depth and damage threshold of SAs are measured to be 64.17% and 14.13 J/cm2, respectively. Both theoretical and experimental results indicate that MoS2-Sb2Te3-MoS2 heterostructure materials have large modulation depth, and can resist high power during the generation of ultrashort pulses. The MoS2-Sb2Te3-MoS2 heterostructure materials have the advantages of low cost, high reliability, and suitability for mass production, and provide a promising solution for the development of 2D-material-based devices with desirable electronic and optoelectronic properties.
基金项目：National Natural Science Foundation of China (NSFC)10.13039/501100001809 (11674036); Beijing University of Posts and Telecommunications (BUPT)10.13039/501100002766 (IPOC2016ZT04, IPOC2017ZZ05); Beijing Youth Top-Notch Talent Support Program (2017000026833ZK08); Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (U1501501); XAFS Station (BL14W1).
Ya-Nan Zhu：Beijing Computational Science Research Center, Beijing 100193, China
Mengli Liu：State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
Bo Wen：Beijing Computational Science Research Center, Beijing 100193, China
Shaobo Fang：Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Hao Teng：Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Ming Lei：State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, Chinae-mail: firstname.lastname@example.org
Li-Min Liu：Beijing Computational Science Research Center, Beijing 100193, ChinaSchool of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100083, Chinae-mail: email@example.com
Zhiyi Wei：Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
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Wenjun Liu, Ya-Nan Zhu, Mengli Liu, Bo Wen, Shaobo Fang, Hao Teng, Ming Lei, Li-Min Liu, and Zhiyi Wei, "Optical properties and applications for MoS2-Sb2Te3-MoS2 heterostructure materials," Photonics Research 6(3), 220-227 (2018)