Abstract
When the energy of a pump wave is in resonance with the exciton creation energy, the electric susceptibility of a conjugated polymer in response to the probe wave is altered by the exciton gas. In this paper we calculate the dependence of this change on the exciton populations by the equation of motion (EOM) method. The magnitude of optical nonlinearity is also influenced by ambient temperature, by the extent of exciton wave functions, and by the strength of electron-electron interaction. All of these factors can be easily incorporated in the EOM approach systematically. Using the material parameters for polydiacetylene, the optical Kerr coefficient (Formula presented) obtained is about (Formula presented) which is close to experimental value, and is four orders of magnitude larger than the value in nonresonant pump experiments.
| Original language | English |
|---|---|
| Pages (from-to) | 12277-12284 |
| Number of pages | 8 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 56 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - 1997 Jan 1 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Resonant optical nonlinearity of conjugated polymers. / Chang, Ming Che; Meng, Hsin Fei.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 56, No. 19, 01.01.1997, p. 12277-12284.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Resonant optical nonlinearity of conjugated polymers
AU - Chang, Ming Che
AU - Meng, Hsin Fei
PY - 1997/1/1
Y1 - 1997/1/1
N2 - When the energy of a pump wave is in resonance with the exciton creation energy, the electric susceptibility of a conjugated polymer in response to the probe wave is altered by the exciton gas. In this paper we calculate the dependence of this change on the exciton populations by the equation of motion (EOM) method. The magnitude of optical nonlinearity is also influenced by ambient temperature, by the extent of exciton wave functions, and by the strength of electron-electron interaction. All of these factors can be easily incorporated in the EOM approach systematically. Using the material parameters for polydiacetylene, the optical Kerr coefficient (Formula presented) obtained is about (Formula presented) which is close to experimental value, and is four orders of magnitude larger than the value in nonresonant pump experiments.
AB - When the energy of a pump wave is in resonance with the exciton creation energy, the electric susceptibility of a conjugated polymer in response to the probe wave is altered by the exciton gas. In this paper we calculate the dependence of this change on the exciton populations by the equation of motion (EOM) method. The magnitude of optical nonlinearity is also influenced by ambient temperature, by the extent of exciton wave functions, and by the strength of electron-electron interaction. All of these factors can be easily incorporated in the EOM approach systematically. Using the material parameters for polydiacetylene, the optical Kerr coefficient (Formula presented) obtained is about (Formula presented) which is close to experimental value, and is four orders of magnitude larger than the value in nonresonant pump experiments.
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U2 - 10.1103/PhysRevB.56.12277
DO - 10.1103/PhysRevB.56.12277
M3 - Article
VL - 56
SP - 12277
EP - 12284
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 19
ER -