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Science 23 January 1998:
Vol. 279. no. 5350, pp. 553 - 555
DOI: 10.1126/science.279.5350.553
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Reports

Transform-Limited, Narrow-Linewidth Lasing Action in Organic Semiconductor Microcavities

V. Bulovic, V. G. Kozlov, * V. B. Khalfin, S. R. Forrest

Lasing action in organic vertical-cavity surface-emitting laser (OVCSEL) structures is demonstrated. Optically pumped OVCSELs with an active layer composed of a thin-film organic semiconductor tris-(8-hydroxyquinoline) aluminum (Alq3) doped with DCM laser dye produced very narrow linewidth (0.2 ± 0.1 angstrom), high-power (3 watts) emission that could be varied in different devices from orange to red. The efficient energy transfer from Alq3 to DCM results in a threshold input energy of 300 microjoules per square centimeter. An operational lifetime >106 laser pulses was achieved for a device operated well above threshold in atmosphere. The linewidths above threshold are Fourier transform-limited and could potentially be narrowed further.

Center for Photonics and Optoelectronic Materials (POEM), Department of Electrical Engineering and the Princeton Materials Institute, Princeton University, Princeton, NJ 08544, USA.
*   To whom correspondence should be addressed: E-mail: kozlov{at}princeton.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)