Chiral Optical Properties of Tapered Semiconductor Nanoscrolls

Nikita V. Tepliakov, Anvar S. Baimuratov, Ilia A. Vovk, Mikhail Yu Leonov, Alexander V. Baranov, Anatoly V. Fedorov, Ivan D. Rukhlenko

Research output: Contribution to journalArticleResearchpeer-review

22 Citations (Scopus)

Abstract

Large surface-to-volume ratio, one-dimensional quantum confinement, and strong optical activity make chiral nanoscrolls ideal for the detection and sensing of small chiral molecules. Here, we present a simple physical model of chiroptical phenomena in multilayered tapered semiconductor nanoscrolls. Our model is based on a linear transformation of coordinates, which converts nanoscrolls into flat but topologically distorted nanoplatelets whose optical properties can then be treated analytically. As an illustrative application example, we analyze absorption and circular dichroism spectra of CdSe nanoscrolls using an eight-band model of CdSe. We show that the optical activity of the nanoscrolls originates from the chiral distortion of their crystal lattice and determine selection rules for the optically active interband transitions. The results of our study may prove useful for the modeling and design of semiconductor nanoscrolls and nanoscroll-based materials.

Original languageEnglish
Pages (from-to)7508-7515
Number of pages8
JournalACS Nano
Volume11
Issue number7
DOIs
Publication statusPublished - 25 Jul 2017

Keywords

  • circular dichroism
  • colloidal semiconductor
  • coordinate transformation
  • metric tensor
  • nanoplatelets
  • optical activity
  • optical spectroscopy

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