Volume 98, Issue 8, 15 October 2005
Index of content:
- LASERS, OPTICS, AND OPTOELECTRONICS
Characterization of a high-thermal-stability spiroanthracenefluorene-based blue-light-emitting polymer optical gain medium98(2005); http://dx.doi.org/10.1063/1.2085311View Description Hide Description
We report the solid-state optical gain characteristics of a spiroanthracenefluorene polymer, namely, poly(9-spiro(10,10-bis(2-ethylhexyl)--anthracene)fluorene) (PEHSAF), specifically designed for thermal stability. An efficient stimulated emission occurs at under amplified spontaneous emission conditions for asymmetric slab waveguidestructures. The modal gain and propagation loss coefficients were found to be and , respectively. The PEHSAF stimulated emission characteristics are shown to be thermally stable in vacuo for temperatures up to 250 °C. Surface-emitting distributed feedback lasers have been fabricated by spin-coating PEHSAF onto one-dimensional gratingstructures. The lasers operate in the blue spectral region and exhibit low oscillation thresholds and relatively high slope efficiencies . Varying the PEHSAF film thickness allows the tuning of the emission wavelength within a 16 nm window.