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

J. I. Jang, J. B. Ketterson, M. A. Anderson, Robert 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 2008

Fingerprint

Photons
pellets
Electrons
Population dynamics
Semiconductors
Excitation energy
Population Dynamics
photons
Ground state
excitation
Grain boundaries
Energy gap
Impurities
Semiconductor materials
Plasmas
grain boundaries
excitons
impurities
ground state
energy

Keywords

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

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

Cite this

Nonresonant two-photon generation of excitonic matter in a CuCl pellet. / Jang, J. I.; Ketterson, J. B.; Anderson, M. A.; Chang, Robert P. H.

In: Journal of Luminescence, Vol. 128, No. 10, 10.2008, p. 1738-1744.

Research output: Contribution to journalArticle

Jang, J. I. ; Ketterson, J. B. ; Anderson, M. A. ; Chang, Robert P. H. / Nonresonant two-photon generation of excitonic matter in a CuCl pellet. In: Journal of Luminescence. 2008 ; Vol. 128, No. 10. pp. 1738-1744.
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