Journal
ADVANCED MATERIALS
Volume 22, Issue 33, Pages 3690-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201000895
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Funding
- EC [MRTN-CT-2006-036040, ERAS-CT-2003-980409, 212311]
- EPSRC
- Royal Society (Wolfson Refurbishment Scheme)
- Cariplo Foundation, Italy [20060656]
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We demonstrate optical amplification over a band >850 meV, via simultaneous exploitation of stimulated emission from mixed polymer systems in which energy transfer from the higher to lower-gap material is inhibited thanks to a complex interplay between morphology and interchain decoupling, driven by chain encapsulation. Amplified spontaneous emission (ASE) is obtained both with ad-hoc pumping into the relevant bands or with a single excitation (400 nm) able to sustain ASE at both wavelengths simultaneously (two-colour ASE).
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