Laser modes in organic solid-state distributed feedback lasers
- Cite this article as:
- Riechel, S., Lemmer, U., Feldmann, J. et al. Appl Phys B (2000) 71: 897. doi:10.1007/s003400000467
- 211 Views
We report on the laser modes in optically pumped solid-state lasers using an electroluminescent organic semiconductor as the active medium. Mechanically flexible distributed-feedback lasers are fabricated by depositing a thin film of an active material onto a nano-patterned polyester substrate either via spin-coating of a soluble ladder-type poly(p-phenylene) or via vacuum co-sublimation of small organic molecules. The different surface texture resulting from the fabrication process causes different feedback mechanisms. In both lasers higher lateral modes give rise to a broadening of the laser spectra at higher pumping levels.