Circular dichroism of doped carbon nanotubes

Riichiro Saito, M. Shoufie Ukhtary, Sake Wang, Yuya Iwasaki

研究成果: Article査読

5 被引用数 (Scopus)

抄録

Circular dichroism (CD) of a doped carbon nanotube is calculated as a function of wavelength for several values of the Fermi energy. In the calculation of CD, we consider the so-called depolarization effect by taking account of the dielectric function that suppresses or enhances the electric field inside the undoped or doped nanotube, respectively. Because of the induced electric current of the carriers, the CD of a doped carbon nanotube becomes much larger than that of an undoped nanotube when we select the light-propagating direction parallel to the nanotube axis. The sign of CD changes for enantiomer pair of nanotubes or for type-I and type-II semiconductor nanotubes or by changing the Fermi energy, which is useful for identifying nanotubes in the device.

本文言語English
論文番号164301
ジャーナルJournal of Applied Physics
128
16
DOI
出版ステータスPublished - 2020 10月 28

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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