Abstract

A new approach to polythiophene thin films with variable low-energy bandgap is reported. Stille reaction [Angew. Chem. Int. Ed. Engl. 25, 508 (1986)] between a toolbox of different bis(trimethyltin)thiophenes and dihalothieno[3,4-b]pyrazines produces polythiophenes with interesting nonlinear optical properties. By variation of the substituent attached to the pyrazine ring, the electronic and optical properties of the polymer can be strongly influenced, for example, in lowering the bandgap (<1 eV) or in increasing the oscillator strength. The improved oscillator strength is accompanied by a longer conjugation length and leads to higher nonlinearities. Third-order susceptibilities, χ(3), of 10-8 esu were achieved with figures of merit, χ(3)/α (where α is the linear absorption coefficient), of as much as 2×10-13 esu cm. Frequency-tunable degenerate four-wave mixing experiments revealed a strong wavelength dispersion of the figure of merit above the bandgap, in contrast to scaling laws empirically found by other groups.

© 1998 Optical Society of America

Full Article  |  PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (12)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription