Advanced Materials

Cover image for Vol. 27 Issue 44

April 27, 2002

Two-photon pumped laser action...

Two-photon pumped laser action in an organic surface-emitting laser structure, shaped as a circular grating, is demonstrated. The device exhibits a narrow linewidth blue laser emission with a clear lasing threshold upon two-photon excitation, which indicates that the polymer has a large cross section for both stimulated emission and two-photon absorption. The combination of the large cross sections and the high fluorescence quantum yield in the solid state offers potential for nonlinear light-emitting devices and for efficient wavelength conversion (R. F. Mahrt et al., May 5; Adv. Mater. 2002, 14, 673-676).

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