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Published on: February 25, 2017
Amplified spontaneous emission from opal photonic crystals engineered with structural defects
Francesco Di Stasio1, Luca Berti, Martin Burger
1Università degli Studi di Genova, Dipartimento di Chimica e Chimica Industriale, Via Dodecaneso 31, 16146 Genova, Italy.
Physical Chemistry Chemical Physics : PCCP
|December 22, 2009
Summary
We engineered photonic crystals with defects to control light emission. This allows for amplified spontaneous emission (ASE) from embedded conjugated polymers within the photonic stop band.
Area of Science:
- Photonics
- Materials Science
- Optoelectronics
Background:
- Opals are photonic crystals with natural periodic structures.
- Photonic crystals can control light propagation through photonic band gaps.
- Conjugated polymers are used as light-emitting materials.
Purpose of the Study:
- To investigate the optical properties of engineered photonic crystals.
- To study amplified spontaneous emission (ASE) in opals with defects.
- To analyze the modification of polymer emission within defect states.
Main Methods:
- Fabrication of polystyrene opals with planar structural defects.
- Incorporation of a conjugated polymer emitter into the defect layer.
- Optical characterization using transmittance and reflectance spectroscopy.
Main Results:
- Defect states within the photonic stop band were observed.
- The emission spectrum of the polymer was significantly modified by the defect.
- Clear evidence of amplified spontaneous emission (ASE) was detected.
Conclusions:
- Engineered defects in photonic crystals enable control over light emission.
- Conjugated polymer emission is strongly influenced by defect states.
- These engineered photonic crystals show potential for ASE applications.
