第149回先端計測オープンセミナー

STM-based single-molecule optical spectroscopy

開催日: 2019.10.31 終了


日時

2019年10月31日 (木) 15:00-16:00

会場

国立研究開発法人 物質・材料研究機構
千現地区 研究本館8階 中セミナー室

参加方法及びお問合わせ

事前登録は必要ありません。
当日会場で受付いたします。
お問い合わせは、右記事務局までご連絡ください。

講演者

Prof. Zhenchao Dong
Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China

表題

STM-based single-molecule optical spectroscopy

講演要旨

The nanocavity defined by the coinage-metal tip and substrate in a scanning tunneling microscope (STM) can provide highly localized and dramatically enhanced electromagnetic fields upon proper plasmonic resonant tuning, which can modify the excitation and emission of a single molecule inside the nanocavity and produce intriguing new optoelectronic phenomena. In this talk, I shall demonstrate two STM-based phenomena related to single-molecule optical spectroscopy. The first is single-molecule Raman scattering [1]. The spatial resolution of tip enhanced Raman spectromicroscopy has been further driven down to a single chemical-bond scale. Such simultaneous energetically and spatially resolved capability for vibrational-mode mapping opens up a new possibility to determine molecular chemical structure by optical imaging at only a single molecule. The second phenomenon is single-molecule electroluminescence [2]. Our recent research on its excitation mechanism and single-photon emission behavior will be briefly presented. I shall also demonstrate how sub-nanometer resolved electroluminescence imaging can be used to gain insights into the intramolecular vibronic coupling and intermolecular dipole-dipole coupling in real space.

References:
1. R. Zhang, Y. Zhang, Z. C. Dong*, S. Jiang, C. Zhang, L. G. Chen, L. Zhang, Y. Liao, J. Aizpurua, Y. Luo, J. L. Yang, and J. G. Hou*, Nature 498, 82-85 (2013).
2. Y. Zhang, Y. Luo, Y. Zhang, Y. J. Yu, Y. M. Kuang, L. Zhang, Q. S. Meng, Y. Luo, J. L. Yang, Z. C. Dong*, and J. G. Hou*, Nature 531, 623-627 (2016).


イベント・セミナーデータ

イベント・セミナー名
第149回先端計測オープンセミナー
STM-based single-molecule optical spectroscopy
会場
国立研究開発法人 物質・材料研究機構
千現地区 研究本館8階 中セミナー室
開催日: 時間
2019.10.31
15:00-16:00
参加料
無料

お問合わせ

国立研究開発法人 物質・材料研究機構 先端材料解析研究拠点運営室
Tel:029-859-2643/2839
Fax:029-859-2801
E-Mail: amc=ml.nims.go.jp([ = ] を [ @ ] にしてください)
2024.03
Sun Mon Tue Wed Thu Fri Sat
1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31