報告日期：2018年5月31日
報告時間：9:00
報告題目：恒元物理學講座（第119期）：When Plasmons Meet 2D Transition Metal Dichalcogenides
報 告 人：張順平 副教授（武漢大學）
報告地點：長安校區(qū) 物理學與信息技術(shù)學院六層學術(shù)報告廳（致知樓3623）
主辦單位：物理學與信息技術(shù)學院
報告摘要：
Metallic nanostructures attract considerable interest in the past two decades due to their outstanding capability of concentrating light at the deep subwavelength scale. The direct consequence of this effect is the ultrasmall mode volume of the optical modes that can boost the light-matter interaction. On the other hand, momolayer transition metal dichalcogenides (TMDs) show excellent optoelectronical properties that arose significant enthusiasm. The integration of metal nanostructures with TMDs joints the good sides from the two constitutes, leading to extra functionalities that are appealing for integrated nanophotonic applications. In this talk, I will show that the combination of proper chosen metal nanorods with a monolayer WSe2 yields hybrid states (plexcitons) resulting from the strong coupling of plasmons and excitons [1]. Rabi splitting as large as 49.5 meV can be obtained at room temperature. In a nanoparticle-over-miror (NPOM) system, the single atom layer behaves as a well define probe for surface enhanced Raman scattering [2] and fluorescence emission [3]. Finally, by combining the strong second order nonlinearity of monolayer TMDs with crystallined silver nanowires, plasmonic fibers [4], we show how to realize momentum-conversed second harmonic generation (SHG) for surface plasmon polaritons (SPPs). Transversely divergent but axially collimated SHG output from the hybrid system is observed by Fourier imaging [5].
1. D. Zheng, S. P. Zhang, Q. Deng, et al., Nano Lett. 17, 3809 (2017).
2. J. W. Sun, H. T. Hu, D. Zheng, et al, Submitted.
3. W. Chen, S. P. Zhang, M. Kang, et al, Submitted.
4. Wei, H.; Pan, D.; Zhang, S. P.; et al, Chem. Rev. DOI:10.1021/acs.chemrev.7b00441 (2018).
5. Li, Y.; Kang, M.; Shi, J.; et al., Nano Lett. 17, 7803-7808 (2017).
報告人簡介：
張順平，武漢大學物理科學與技術(shù)學院副教授。2008年本科畢業(yè)于中山大學，2013年1月在中國科學院物理研究所獲得博士學位，隨后加盟武漢大學物理學院，2015年4月起任副教授。主要研究領(lǐng)域為表面等離激元光子學、納米光子學，近期在納米腔中的光與物質(zhì)相互作用、等離激元波導中的二階非線性過程以及超靈敏納米光學傳感器研究方面有突破性進展。已在Phys. Rev. Lett.、Nat. Commun.、PNAS、Nano Lett.、ACS Nano等雜志上發(fā)表學術(shù)論文30篇，H-index為17。
