Year
Month
(Peer-Reviewed) Boron quantum dots all-optical modulator based on efficient photothermal effect
Cong Wang 王聪 ¹, Qianyuan Chen 陈潜源 ², Hualong Chen 陈华龙 ¹, Jun Liu 刘军 ¹, Yufeng Song 宋宇锋 ¹, Jie Liu 刘杰 ³, Delong Li 黎德龙 ¹, Yanqi Ge 葛颜绮 ¹, Youning Gong 龚佑宁 ¹, Yupeng Zhang 张豫鹏 ¹, Han Zhang 张晗 ¹
¹ Collaborative Innovation Center for Optoelectronic Science & Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
中国 深圳 深圳大学微纳光电子学研究院 二维材料光电科技教育部国际合作联合实验室 光电科技协同创新中心
² School of Physics and Technology, and MOE Key Laboratory of Artificial Micro-and Nano-Structures, Wuhan University, Wuhan 430072, China
中国 武汉 武汉大学物理科学与技术学院 人工微结构教育部重点实验室
³ Shandong Provincial Engineering and Technical Center of Light Manipulation & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
中国 济南 山东师范大学物理与电子科学学院 山东省光场调控工程技术中心 山东省光学与光子器件技术重点实验室
Opto-Electronic Advances, 2021-07-25
Abstract

All-optical devices without external electronic components have drawn extraordinary attentions in all-optical communication. In this work, boron quantum dots (BQDs) were synthesized by a facile liquid-phase exfoliation method. The as-prepared BQDs showed good structural homogeneity and crystallinity, broadband optical absorption as well as excellent photothermal properties.

Femtosecond-resolved transient absorption further revealed the short carrier relaxation time of BQDs. Inspired by the outstanding photothermal properties and ultrafast carrier dynamic of BQDs, we fabricated BQDs-based all-optical modulator. The phase shift with a slope efficiency of 0.032 π/mW and response time of 0.97 ms can be achieved.

The modulator was used in laser resonance cavity to achieve all-optical actively Q-switched laser operation with control repetition rate. This prototypical BQDs-based all-optical modulator shows a great potential to be applied in all-optical information processing and communication.
Boron quantum dots all-optical modulator based on efficient photothermal effect_1
Boron quantum dots all-optical modulator based on efficient photothermal effect_2
Boron quantum dots all-optical modulator based on efficient photothermal effect_3
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