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

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

doi:10.1016/j.jlumin.2008.04.005

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

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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 language	English (US)
Pages (from-to)	1738-1744
Number of pages	7
Journal	Journal of Luminescence
Volume	128
Issue number	10
DOIs	https://doi.org/10.1016/j.jlumin.2008.04.005
State	Published - Oct 2008

Funding

This work is supported by the National Science Foundation under a US/Ireland cooperation, Grant 0306731, and the Northwestern Materials Research Center under NSF Grant DMR-0520513.

Keywords

Excitonic matter
Mott transition
Photoluminescence
Two-photon excitation

ASJC Scopus subject areas

Biophysics
Atomic and Molecular Physics, and Optics
General Chemistry
Biochemistry
Condensed Matter Physics

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10.1016/j.jlumin.2008.04.005

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title = "Nonresonant two-photon generation of excitonic matter in a CuCl pellet",

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.",

keywords = "Excitonic matter, Mott transition, Photoluminescence, Two-photon excitation",

author = "Jang, {J. I.} and Ketterson, {J. B.} and Anderson, {M. A.} and Chang, {R. P.H.}",

year = "2008",

month = oct,

doi = "10.1016/j.jlumin.2008.04.005",

language = "English (US)",

volume = "128",

pages = "1738--1744",

journal = "Journal of Luminescence",

issn = "0022-2313",

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T1 - Nonresonant two-photon generation of excitonic matter in a CuCl pellet

AU - Jang, J. I.

AU - Ketterson, J. B.

AU - Anderson, M. A.

AU - Chang, R. P.H.

PY - 2008/10

Y1 - 2008/10

N2 - 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.

AB - 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.

KW - Excitonic matter

KW - Mott transition

KW - Photoluminescence

KW - Two-photon excitation

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DO - 10.1016/j.jlumin.2008.04.005

M3 - Article

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SN - 0022-2313

VL - 128

SP - 1738

EP - 1744

JO - Journal of Luminescence

JF - Journal of Luminescence

IS - 10

ER -

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

Abstract

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Keywords

ASJC Scopus subject areas

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