Anomalous two-photon generation of excitons in CuCl pellets

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

doi:10.1063/1.2841043

Anomalous two-photon generation of excitons in CuCl pellets

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

^*Corresponding author for this work

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

4 Scopus citations

Abstract

We report on an anomalous excitation of excitonic matter in pressed CuCl pellets. In these random materials, we find that excitons are initially created for an excitation energy in the range of 1892-2843 meV, which is far below the bandgap of this semiconductor. The excitation-power dependence from the population dynamics of excitonic matter strongly indicates an unusual two-photon generation of ground-state excitons. Considering this off-resonance effect, excitons are probably generated from a continuum of impurity-induced levels excited by two-photon pumping.

Original language	English (US)
Article number	051912
Journal	Applied Physics Letters
Volume	92
Issue number	5
DOIs	https://doi.org/10.1063/1.2841043
State	Published - 2008

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Anomalous two-photon generation of excitons in CuCl pellets",

abstract = "We report on an anomalous excitation of excitonic matter in pressed CuCl pellets. In these random materials, we find that excitons are initially created for an excitation energy in the range of 1892-2843 meV, which is far below the bandgap of this semiconductor. The excitation-power dependence from the population dynamics of excitonic matter strongly indicates an unusual two-photon generation of ground-state excitons. Considering this off-resonance effect, excitons are probably generated from a continuum of impurity-induced levels excited by two-photon pumping.",

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

note = "Funding Information: This work is supported by NSF under a U.S./Ireland cooperation, Grant No. 0306731, and the Northwestern Materials Research Center under NSF Grant No. DMR-9632472. ",

year = "2008",

doi = "10.1063/1.2841043",

language = "English (US)",

volume = "92",

journal = "Applied Physics Letters",

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T1 - Anomalous two-photon generation of excitons in CuCl pellets

AU - Jang, J. I.

AU - Anderson, M. A.

AU - Ketterson, J. B.

AU - Chang, R. P.H.

N1 - Funding Information: This work is supported by NSF under a U.S./Ireland cooperation, Grant No. 0306731, and the Northwestern Materials Research Center under NSF Grant No. DMR-9632472.

PY - 2008

Y1 - 2008

N2 - We report on an anomalous excitation of excitonic matter in pressed CuCl pellets. In these random materials, we find that excitons are initially created for an excitation energy in the range of 1892-2843 meV, which is far below the bandgap of this semiconductor. The excitation-power dependence from the population dynamics of excitonic matter strongly indicates an unusual two-photon generation of ground-state excitons. Considering this off-resonance effect, excitons are probably generated from a continuum of impurity-induced levels excited by two-photon pumping.

AB - We report on an anomalous excitation of excitonic matter in pressed CuCl pellets. In these random materials, we find that excitons are initially created for an excitation energy in the range of 1892-2843 meV, which is far below the bandgap of this semiconductor. The excitation-power dependence from the population dynamics of excitonic matter strongly indicates an unusual two-photon generation of ground-state excitons. Considering this off-resonance effect, excitons are probably generated from a continuum of impurity-induced levels excited by two-photon pumping.

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 5

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ER -

Anomalous two-photon generation of excitons in CuCl pellets

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