Exciton fine structure in a single carbon nanotube revealed through spectral diffusion

Kazunari Matsuda, Tadashi Inoue, Yoichi Murakami, Shigeo Maruyama, and Yoshihiko Kanemitsu
Phys. Rev. B 77, 193405 – Published 20 May 2008

Abstract

We studied the spectral diffusion and exciton fine structures of single-walled carbon nanotubes (SWNTs) by using single carbon nanotube spectroscopy. Two types of single nanotube photoluminescence (PL) spectra were observed at temperatures below 50 K, which are double peaks with spectral diffusion and a single peak without spectral diffusion. The spectral diffusion that occurs in the lower energy peak of the split PL spectrum is associated with the quantum-confined Stark effect. Our observations suggest that symmetry breaking caused by the strong local electric field enables us to observe the dark exciton state below the bright exciton state in single SWNTs.

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  • Received 9 April 2008

DOI:https://doi.org/10.1103/PhysRevB.77.193405

©2008 American Physical Society

Authors & Affiliations

Kazunari Matsuda1,*, Tadashi Inoue1, Yoichi Murakami2, Shigeo Maruyama2, and Yoshihiko Kanemitsu1,3,†

  • 1Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
  • 2Department of Mechanical Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
  • 3Photonics and Electronics Science and Engineering Center, Kyoto University, Kyoto 615-8510, Japan

  • *matsuda@scl.kyoto-u.ac.jp
  • kanemitu@scl.kyoto-u.ac.jp

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Issue

Vol. 77, Iss. 19 — 15 May 2008

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