2016年 第77回応用物理学会秋季学術講演会

講演情報

一般セッション(口頭講演)

4 JSAP-OSA Joint Symposia 2016 » 4.6 Nanocarbon and 2D Materials

[13p-A37-1~13] 4.6 Nanocarbon and 2D Materials

2016年9月13日(火) 13:15 〜 17:45 A37 (306-307)

松田 一成(京大)、宮内 雄平(京大)

14:15 〜 14:45

[13p-A37-4] [JSAP-OSA Joint Symposia 2016 Invited Talk] Electron energy-loss spectroscopy to probe the local optical properties of low-dimensional materials

Kazu Suenaga1,2、YungChang Lin1、Luiz Tizei1,3、Ryosuke Senga1、Junhao Lin1 (1.AIST、2.Tokyo Univ.、3.Univ. Paris-Sud)

キーワード:EELS, absorption spectroscopy, 2D materials

Recent development of analytical transmission electron microscopes (TEM) with a monochromated gun allows us to obtain the electron energy-loss spectra (EELS) in the range of valence region with a few tens of meV energy resolution even when an atomic size probe is used. If the specimen is an "surface object", the EELS is fully comparable to the optical spectroscopy. Therefore the correlation of the detailed atomic structure of matter with its optical spectrum is now made possible in TEM. We show here an example of spatially resolved exciton mapping across an interface between single-layered MoS2 and MoSe2 [1]. Optical spectroscopy of individual carbon nanotubes with the known chirarity will be also shown [2].
[1] L. Tizei et al., Phys. Rev. Lett., 114 (2015) 107601
[2] R. Senga et al., NanoLett. (2016) in press DOI: 10.1021/acs.nanolett.6b00825
[3] This work is supported by JST-CREST and Research Acceleration programs.