Electro-absorption in a polydiacetylene

Y. Kawabe; F. Jarka; N. Peyghambarian; Dandan Guo; S. Mazumdar; S. N. Dixit; F. Kajzar

doi:10.1016/0379-6779(92)90207-Y

Electro-absorption in a polydiacetylene

Y. Kawabe, F. Jarka, N. Peyghambarian, Dandan Guo, S. Mazumdar, S. N. Dixit, F. Kajzar

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

13 Scopus citations

Abstract

The electro-absorption in a DCH-polydiacetylene has been investigated both experimentally and theoretically. In addition to the red Stark shift of the exciton, a significant feature in the difference spectrum is observed at a higher energy. Within an interacting electron model (extended Peierls-Hubbard model), the roles played by the dipole-allowed one-photon states and the dipole-forbidden two-photon states are studied in detail. It is found that the high-energy signals in the difference spectrum are due to the strong field-induced mixing of the one-photon state at the edge of a continuum structure, or 'conduction band' in the language of band theory, with its neighboring two-photon states. Contributions to the electro-absorption from the one- and two-photon states cancel deep within the band. Three-photon resonance due to the band edge is expected in third-harmonic generation (THG) and has been seen in both a polydiacetylene and in polysilanes.

Original language	English (US)
Pages (from-to)	517-523
Number of pages	7
Journal	Synthetic Metals
Volume	50
Issue number	1-3
DOIs	https://doi.org/10.1016/0379-6779(92)90207-Y
State	Published - Aug 15 1992

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(92)90207-Y

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title = "Electro-absorption in a polydiacetylene",

abstract = "The electro-absorption in a DCH-polydiacetylene has been investigated both experimentally and theoretically. In addition to the red Stark shift of the exciton, a significant feature in the difference spectrum is observed at a higher energy. Within an interacting electron model (extended Peierls-Hubbard model), the roles played by the dipole-allowed one-photon states and the dipole-forbidden two-photon states are studied in detail. It is found that the high-energy signals in the difference spectrum are due to the strong field-induced mixing of the one-photon state at the edge of a continuum structure, or 'conduction band' in the language of band theory, with its neighboring two-photon states. Contributions to the electro-absorption from the one- and two-photon states cancel deep within the band. Three-photon resonance due to the band edge is expected in third-harmonic generation (THG) and has been seen in both a polydiacetylene and in polysilanes.",

author = "Y. Kawabe and F. Jarka and N. Peyghambarian and Dandan Guo and S. Mazumdar and Dixit, {S. N.} and F. Kajzar",

note = "Funding Information: The authors would like to acknowledge support from NSF grant number ECS-11960 and the Optical Circuitry Cooperative at the University of Arizona. The work of S.D.N. was supported by USDOE, LLNL, under contract No. W-7405-ENG-48. We wish to express our thanks to M. Pratt at Arizona State University for his preparation of the electrodes. S. M. is grateful to Associated Western Universities Incorporated for a summer faculty fellowship and to the Center for Nonlinear Studies, Los Alamos National Laboratory, for its hospitality during the period when this work was completed.",

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AU - Kawabe, Y.

AU - Jarka, F.

AU - Peyghambarian, N.

AU - Guo, Dandan

AU - Mazumdar, S.

AU - Dixit, S. N.

AU - Kajzar, F.

N1 - Funding Information: The authors would like to acknowledge support from NSF grant number ECS-11960 and the Optical Circuitry Cooperative at the University of Arizona. The work of S.D.N. was supported by USDOE, LLNL, under contract No. W-7405-ENG-48. We wish to express our thanks to M. Pratt at Arizona State University for his preparation of the electrodes. S. M. is grateful to Associated Western Universities Incorporated for a summer faculty fellowship and to the Center for Nonlinear Studies, Los Alamos National Laboratory, for its hospitality during the period when this work was completed.

PY - 1992/8/15

Y1 - 1992/8/15

N2 - The electro-absorption in a DCH-polydiacetylene has been investigated both experimentally and theoretically. In addition to the red Stark shift of the exciton, a significant feature in the difference spectrum is observed at a higher energy. Within an interacting electron model (extended Peierls-Hubbard model), the roles played by the dipole-allowed one-photon states and the dipole-forbidden two-photon states are studied in detail. It is found that the high-energy signals in the difference spectrum are due to the strong field-induced mixing of the one-photon state at the edge of a continuum structure, or 'conduction band' in the language of band theory, with its neighboring two-photon states. Contributions to the electro-absorption from the one- and two-photon states cancel deep within the band. Three-photon resonance due to the band edge is expected in third-harmonic generation (THG) and has been seen in both a polydiacetylene and in polysilanes.

AB - The electro-absorption in a DCH-polydiacetylene has been investigated both experimentally and theoretically. In addition to the red Stark shift of the exciton, a significant feature in the difference spectrum is observed at a higher energy. Within an interacting electron model (extended Peierls-Hubbard model), the roles played by the dipole-allowed one-photon states and the dipole-forbidden two-photon states are studied in detail. It is found that the high-energy signals in the difference spectrum are due to the strong field-induced mixing of the one-photon state at the edge of a continuum structure, or 'conduction band' in the language of band theory, with its neighboring two-photon states. Contributions to the electro-absorption from the one- and two-photon states cancel deep within the band. Three-photon resonance due to the band edge is expected in third-harmonic generation (THG) and has been seen in both a polydiacetylene and in polysilanes.

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Electro-absorption in a polydiacetylene

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