报告题目：金属等离激元阴极荧光纳米显微研究

报 告 人：方哲宇 研究员（北京大学）

报告时间：2020年11月30日（星期一）上午9:00

报告地点：威廉希尔六层学术报告厅（致知楼3623）

报告摘要：

Circularly polarized light is crucial for the modern physics research. Highly integrated nanophotonic device further requires the control of circularly polarized light at subnanoscale. Here, we report the tuning of chiral cathodoluminescence (CL) on single Au nanostructure under electron stimulation. The detected CL helicity is found ultrasensitive with the electron impinging position on the structure, and a helicity switch is achieved within a 1.86 nm electron-beam movement, which is applied to construct ternary notation sequence. The proposed configuration provides a delicate platform for the CL helicity control, which opens a way for the future chiral applications at subnanoscale like information coding and quantum communication. [1-4].

参考文献

[1] Yu Li, et.al. "Self-learning Perfect Optical Chirality via Deep Neural Network", Physical Review Letters 123: 213902, 2019.

[2] Shuai Zu, et.al, "Imaging of Plasmonic Chiral Radiative Local Density of States with Cathodoluminescence Nanoscopy", Nano Letters 19: 775, 2019.

[3] Shuai Zu, et.al., "Deep-Subwavelength Resolving and Manipulating of Hidden Chirality in Achiral Nanostructures", ACS Nano 12: 3908, 2018.

[4] Tianyang Han, et.al. "Reveal and Control of Chiral Cathodoluminescence at Subnanoscale", Nano Letters 18: 567, 2018.

报告人简介：

方哲宇，北京大学威廉希尔研究员，全国百篇优博，基金委优青，教育部自然科学二等奖（第一完成人）。主要研究微纳光子学超高分辨表征、新型光场调控和应用，以及金属等离激元纳米器件集成；发表Phys. Rev. Lett.、Chem. Rev., Nano Lett., Adv. Mater，Nat. Comm., Sci. Advances系列等高水平学术期刊上发表论文120余篇，SCI引用10000余次，13篇ESI高被引论文, h因子43。主持科技部国家重点研发计划”纳米科技”重点专项、基金委国家重大科研仪器研制项目。

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