Abstract
Optically pumped surface emitting and edge emitting stimulated emission behaviors in organic semiconductor was demonstrated in this study. For the surface emitting device, the microcavity was formed by sandwiching a polymer film containing PVK, Alq and DCM between a DBR with a reflectivity of 99.5% and a silver film. The sample was optically pumped by the three harmonic of a mode-locked Nd:YAG laser with 300 ps pulses at 2 Hz repetition rate. The lasing phenomenon was observed in DCM-doped PVK microcavity when pumped above the threshold intensity of 0.25 MW/cm2. The full width at half maximum (FWHM) was 0.6 nm with the peak wavelength at 603 nm. For the edge emitting device, a laser dye DCM doped Alq matrix was used as the gain medium. The sample was transversely pumped by the three harmonic output of the mode-locked Nd:YAG laser. The change of the emission spectra showed a clear threshold action and gain narrowing phenomenon when increasing the excitation intensity. The spectra narrowing observed results from the amplified spontaneous emission (ASE) in the gain material.
| Original language | English |
|---|---|
| Pages (from-to) | 92-96 |
| Number of pages | 5 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 3899 |
| DOIs | |
| State | Published - 1999 |
| Event | Proceedings of the 1999 Photonics Technology into the 21st Century: Semiconductors, Microstructures, and Nanostructures - Singapore, Singapore Duration: Dec 1 1999 → Dec 3 1999 |