LO Phonon Renormalization in Optically Excited CuCl Nanocrystals

Phys. Rev. Lett. 80, 3105 – Published 6 April 1998
Lev Zimin, Selvakumar V. Nair, and Yasuaki Masumoto

Abstract

We have revealed sharp structures in the absorption spectrum of CuCl nanocrystals using persistent hole-burning spectroscopy and observed sidebands due to phonon-assisted absorption. The LO phonon frequency in the excited state of the nanocrystal is reduced by about 10% from the free value due to mixing with the exciton. When the mixing becomes resonant, the phonon sideband anticrosses with the excited exciton state. We present a theory of the phonon renormalization in nanocrystals and obtain results in excellent agreement with the experiment.

DOI: http://dx.doi.org/10.1103/PhysRevLett.80.3105

  • Received 15 December 1997
  • Published in the issue dated 6 April 1998

© 1998 The American Physical Society

Authors & Affiliations

Lev Zimin1,*, Selvakumar V. Nair1, and Yasuaki Masumoto1,2

  • 1ERATO Single Quantum Dot Project, Japan Science and Technology Corporation, 5-9-9 Tohkohdai, Tsukuba 300-2635, Japan
  • 2Institute of Physics, University of Tsukuba, Tsukuba 305-8571, Japan

  • *Permanent address: Stepanov Institute of Physics, F. Skaryna Avenue, 70 Minsk 220072, Belarus.

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