Electro-absorption in a polydiacetylene

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

Research output: Contribution to journalArticle

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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 languageEnglish (US)
Pages (from-to)517-523
Number of pages7
JournalSynthetic Metals
Volume50
Issue number1-3
DOIs
StatePublished - Aug 15 1992

Fingerprint

Photons
photons
Polysilanes
dipoles
polysilanes
Hubbard model
Harmonic generation
polydiacetylene
Conduction bands
Excitons
harmonic generations
conduction bands
excitons
continuums
energy
Electrons
shift
electrons

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Electro-absorption in a polydiacetylene. / Kawabe, Y.; Jarka, F.; Peyghambarian, Nasser N; Guo, Dandan; Mazumdar, Sumitendra; Dixit, S. N.; Kajzar, F.

In: Synthetic Metals, Vol. 50, No. 1-3, 15.08.1992, p. 517-523.

Research output: Contribution to journalArticle

Kawabe, Y, Jarka, F, Peyghambarian, NN, Guo, D, Mazumdar, S, Dixit, SN & Kajzar, F 1992, 'Electro-absorption in a polydiacetylene', Synthetic Metals, vol. 50, no. 1-3, pp. 517-523. https://doi.org/10.1016/0379-6779(92)90207-Y
Kawabe, Y. ; Jarka, F. ; Peyghambarian, Nasser N ; Guo, Dandan ; Mazumdar, Sumitendra ; Dixit, S. N. ; Kajzar, F. / Electro-absorption in a polydiacetylene. In: Synthetic Metals. 1992 ; Vol. 50, No. 1-3. pp. 517-523.
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