学术报告预告

报告题目:Strong Vibrational Coupling in Plasmonic Resonators

报告人:国家杰出青年科学基金获得者、深圳大学微纳光电子学研究院执行经理汪国平教授

报告时间:20199614:30

报告地点:物理楼213会议室


内容提要:Vibrating plasmonic nanoparticles generate two types of acoustic waves. One is the localized acoustic vibrations of the metal nanoparticle itself, which give fundamental insight into the mechanical properties of the particle. The other is propagating picosecond acoustic waves in the surrounding medium, which are experiencing increasing applications in biology and materials science. Femtosecond laser spectroscopy in a pump-probe scheme offers a unique way of directly observing these two types of phonons in the time domain by judicious choice of the probe wavelength. In this talk, we will discuss these two types of acoustic waves generated from single plasmonic resonators. The high frequency acoustic vibrations (up to 100 GHz) inherent to these plasmonic resonators enabled us to study the solvent dynamics. We’ve discovered the outgoing picosecond acoustic waves damp the mechanical vibrations of plasmonic resonators. Blocking the phonon decay pathway, we improved the vibrational quality factors of metallic resonators by an order of magnitude which enabled us to observe strong vibrational coupling in purely plasmonic nanoresonators. Our results provided a new platform for future observation and control of the quantum behavior of phonon modes in metallic nanoparticles.


个人简介:汪国平,深圳大学特聘教授,深圳大学微纳光电子学研究院执行经理。四川大学博士,大阪大学博士后,东京工业大学、香港科技大学、南洋理工大学访问学者。曾获国家杰出青年基金、教育部新世纪优秀人才项目资助,以及国家自然科学奖二等奖,湖北省自然科学奖一等奖,教育部首届全国高校优秀骨干教师奖等多项奖励,享受国务院特殊津贴。曾任武汉大学二级教授、珞珈学者特聘教授。指导的博士生分别获得20092010年度全国优秀博士论文提名奖。主持国家杰出青年基金、国家重大科学研究计划项目课题、国家自然科学基金重点项目等20余项。 在光学超材料、光学超分辨成像与传感、纳米光子学等前沿领域发表包括Phys. Rev. Lett.Nature CommunPhys. Rev. Appl.Appl. Phys. Lett.Opt. Lett.ACS NanoNano Lett.Light Sci. Appl.等论文120余篇,合著英文专著《Plasmonic Nanoguides and Circuits》一部。研究成果被包括Nobel奖获得者在内的国际知名科学家在Rev. Mod. Phys.NatureSciencePhys. Rep.Review和研究论文上评价和引用,研究成果分别被OSA选为最好的论文、作为研究亮点、期刊封面、研究新闻报道或被评价为重大进展、开创性工作。目前研究领域涉及光学超材料、纳米光子器件、光学超分辨成像和微纳结构的超快动力学。


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