Nonresonant two-photon generation of excitonic matter in a CuCl pellet

J. I. Jang, J. B. Ketterson, M. A. Anderson, R. P.H. Chang

Research output: Contribution to journalArticle

Abstract

A pressed CuCl pellet is optically excited at 2 K using an excitation energy in the range from 1892 to 2843 meV, which is far below the bandgap. The steady-state population dynamics unambiguously indicates an unusual two-photon generation of ground-state excitons. At high-excitation levels, the observed spectra exhibit rich spectral features arising from electron-hole plasma and electron-hole droplets formation. This nonresonant two-photon excitation is presumably assisted by impurity bands due to grain boundaries and surfaces in this random semiconductor.

Original languageEnglish
Pages (from-to)1738-1744
Number of pages7
JournalJournal of Luminescence
Volume128
Issue number10
DOIs
Publication statusPublished - Oct 1 2008

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Keywords

  • Excitonic matter
  • Mott transition
  • Photoluminescence
  • Two-photon excitation

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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