Abstract
We report a study of light amplification in dilute solutions of the semiconducting polymer poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT). The operating characteristics of the F8BT solution amplifier are investigated in detail, and we show that it provides a large optical gain (>40 dB/cm) across a wide (>48 nm) spectral bandwidth in the green. The saturation characteristics of the amplifier are found to be in excellent agreement with theoretical predictions, allowing an estimate of the F8BT stimulated emission cross-section, sigma. We find sigmasimilar to1.7x10(-16) cm(2), comparable with the reported values for established laser dyes and other high-gain conjugated polymers. (C) 2004 American Institute of Physics.
Original language | English |
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Pages (from-to) | 6122-6124 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 85 |
DOIs | |
Publication status | Published - 20 Dec 2004 |
Keywords
- CONJUGATED POLYMER
- GAIN MEDIA
- EMISSION
- LASERS