Abstract
We present a microscopic mechanism of optical nonlinearity in conjugated polymers. It is shown that the bulk of the nonlinearity is determined by only two well-defined channels, even though an infinite number of channels are possible in principle. We are able to explain the complete frequency dependence of the third-harmonic generation in both trans-polyacetylene and polydiacetylene within the same model without invoking weak Coulomb interactions between electrons or interchain interactions.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 6781-6784 |
| Number of pages | 4 |
| Journal | Physical Review B |
| Volume | 43 |
| Issue number | 8 |
| DOIs | |
| State | Published - 1991 |
ASJC Scopus subject areas
- Condensed Matter Physics