GIST Scholar
College of Engineering
Department of Materials Science and Engineering
1. Journal Articles
Characterization of a high-thermal-stability spiroanthracenefluorene-based blue-light-emitting polymer optical gain medium
- Type
- Article
- Citation
- Journal of Applied Physics, v.98, no.8, pp.083101-1 - 083101-7
- Issued Date
- 2005-10
- Abstract
- We report the solid-state optical gain characteristics of a spiroanthracenefluorene polymer, namely, poly(9-spiro(10,10-bis(2-ethylhexyl)-10H-anthracene)fluorene) (PEHSAF), specifically designed for thermal stability. An efficient stimulated emission occurs at lambda=445 nm under amplified spontaneous emission conditions for asymmetric slab waveguide structures. The modal gain and propagation loss coefficients were found to be g <= 38 cm(-1) and alpha=0.8 cm(-1), respectively. The PEHSAF stimulated emission characteristics are shown to be thermally stable in vacuo for temperatures up to 250 degrees C. Surface-emitting distributed feedback lasers have been fabricated by spin-coating PEHSAF onto one-dimensional grating structures. The lasers operate in the blue spectral region and exhibit low oscillation thresholds (>= 18 nJ) and relatively high slope efficiencies (<= 5%). Varying the PEHSAF film thickness allows the tuning of the emission wavelength within a 16 nm window.
- Publisher
- American Institute of Physics
- ISSN
- 0021-8979
- Appears in Collections:
- Department of Materials Science and Engineering > 1. Journal Articles
- Files in This Item:
-
-
There are no files associated with this item.
-
Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.