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Science 27 September 1996:
Vol. 273. no. 5283, pp. 1833 - 1836
DOI: 10.1126/science.273.5283.1833
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Reports

Semiconducting Polymers: A New Class of Solid-State Laser Materials

Fumitomo Hide, María A. Díaz-García, Benjamin J. Schwartz, * Mats R. Andersson, dagger Qibing Pei, Alan J. Heeger

Gain narrowing in optically pumped thin films, both neat and undiluted, of luminescent conjugated polymers with different molecular structures was demonstrated. These results indicate that the polymers studied have large cross sections for stimulated emission, that population inversion can be achieved at low pump energies, and that the emitted photons travel distances greater than the gain length within the gain medium. The use of simple waveguide structures is sufficient to cause low gain narrowing thresholds in submicrometer-thick films.

F. Hide, M. A. Díaz-García, B. J. Schwartz, M. R. Andersson, A. J. Heeger, Institute for Polymers and Organic Solids, University of California, Santa Barbara, Santa Barbara, CA 93106-5090, USA.
Q. Pei, UNIAX Corporation, 6780 Cortona Road, Santa Barbara, CA 93117, USA.
*   Present address: Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095-1569, USA.

dagger    Present address: Departments of Organic Chemistry and Polymer Technology, Chalmers University of Technology, S-412 96, Göteborg, Sweden.

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