Two-band model description of electroabsorption and third-harmonic generation in 1-D MX linear chains

Z. Shuai; J. L. Brédas; A. Saxena; J. T. Gammel; A. R. Bishop

doi:10.1016/0379-6779(94)03003-O

Two-band model description of electroabsorption and third-harmonic generation in 1-D MX linear chains

Z. Shuai^*, J. L. Brédas, A. Saxena, J. T. Gammel, A. R. Bishop

^*Corresponding author for this work

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

Abstract

Within a two-band model, we investigate the electroabsorption (EA) and third-harmonic generation (THG) processes in halogen-bridged mixed-valence Pt complexes: PtCl, PtBr and Ptl. For PtCl, the theoretical THG spectrum shows three peaks, corresponding to (i) a three-photon resonance at 0.83 eV originating in a M(etal)-M(etal) transition; (ii) a two-photon resonance at 1.5 eV from an M-M band-edge transition; and (iii) a three-photon resonance at 1.6 eV from an M-X transition. The latter two peaks account well for the twin-peak structure seen experimentally. We show that the twin-peak intensity strongly decreases from PtCl to PtBr and disappears for Ptl. We also discuss the theoretical EA spectra due to localized defects (polarons, bipolarons, kinks, and excitons).

Original language	English (US)
Pages (from-to)	1685-1686
Number of pages	2
Journal	Synthetic Metals
Volume	71
Issue number	1-3
DOIs	https://doi.org/10.1016/0379-6779(94)03003-O
State	Published - Apr 1 1995
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/0379-6779(94)03003-O

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title = "Two-band model description of electroabsorption and third-harmonic generation in 1-D MX linear chains",

abstract = "Within a two-band model, we investigate the electroabsorption (EA) and third-harmonic generation (THG) processes in halogen-bridged mixed-valence Pt complexes: PtCl, PtBr and Ptl. For PtCl, the theoretical THG spectrum shows three peaks, corresponding to (i) a three-photon resonance at 0.83 eV originating in a M(etal)-M(etal) transition; (ii) a two-photon resonance at 1.5 eV from an M-M band-edge transition; and (iii) a three-photon resonance at 1.6 eV from an M-X transition. The latter two peaks account well for the twin-peak structure seen experimentally. We show that the twin-peak intensity strongly decreases from PtCl to PtBr and disappears for Ptl. We also discuss the theoretical EA spectra due to localized defects (polarons, bipolarons, kinks, and excitons).",

author = "Z. Shuai and Br{\'e}das, {J. L.} and A. Saxena and Gammel, {J. T.} and Bishop, {A. R.}",

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doi = "10.1016/0379-6779(94)03003-O",

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T1 - Two-band model description of electroabsorption and third-harmonic generation in 1-D MX linear chains

AU - Shuai, Z.

AU - Brédas, J. L.

AU - Saxena, A.

AU - Gammel, J. T.

AU - Bishop, A. R.

PY - 1995/4/1

Y1 - 1995/4/1

N2 - Within a two-band model, we investigate the electroabsorption (EA) and third-harmonic generation (THG) processes in halogen-bridged mixed-valence Pt complexes: PtCl, PtBr and Ptl. For PtCl, the theoretical THG spectrum shows three peaks, corresponding to (i) a three-photon resonance at 0.83 eV originating in a M(etal)-M(etal) transition; (ii) a two-photon resonance at 1.5 eV from an M-M band-edge transition; and (iii) a three-photon resonance at 1.6 eV from an M-X transition. The latter two peaks account well for the twin-peak structure seen experimentally. We show that the twin-peak intensity strongly decreases from PtCl to PtBr and disappears for Ptl. We also discuss the theoretical EA spectra due to localized defects (polarons, bipolarons, kinks, and excitons).

AB - Within a two-band model, we investigate the electroabsorption (EA) and third-harmonic generation (THG) processes in halogen-bridged mixed-valence Pt complexes: PtCl, PtBr and Ptl. For PtCl, the theoretical THG spectrum shows three peaks, corresponding to (i) a three-photon resonance at 0.83 eV originating in a M(etal)-M(etal) transition; (ii) a two-photon resonance at 1.5 eV from an M-M band-edge transition; and (iii) a three-photon resonance at 1.6 eV from an M-X transition. The latter two peaks account well for the twin-peak structure seen experimentally. We show that the twin-peak intensity strongly decreases from PtCl to PtBr and disappears for Ptl. We also discuss the theoretical EA spectra due to localized defects (polarons, bipolarons, kinks, and excitons).

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U2 - 10.1016/0379-6779(94)03003-O

DO - 10.1016/0379-6779(94)03003-O

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SN - 0379-6779

VL - 71

SP - 1685

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JO - Synthetic Metals

JF - Synthetic Metals

IS - 1-3

ER -

Two-band model description of electroabsorption and third-harmonic generation in 1-D MX linear chains

Abstract

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