Boron quantum dots all-optical modulator based on efficient photothermal effect

• 作者: Cong Wang Qianyuan Chen Hualong Chen Jun Liu Yufeng Song Jie Liu Delong Li Yanqi Ge Youning Gong Yupeng Zhang Han Zhang
• 来源期刊: 光电进展（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: Original Article
• 页码范围: 33-42
• 页数: 10页
• 语种: 英文
• DOI: 10.29026/oea.2021.200032

摘要

All-optical devices without external electronic components have drawn extraordinary attentions in all-optical communica-tion.In this work,boron quantum dots(BQDs)were synthesized by a facile liquid-phase exfoliation method.The as-pre-pared 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.