Journal
OPTICS EXPRESS
Volume 16, Issue 20, Pages 15382-15387Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.16.015382
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- Deutsche Forschungsgemeinschaft (DFG)
- State of Baden-Wurttemberg
- DFG-Center for Functional Nanostructures (CFN)
- Direct For Mathematical & Physical Scien
- Division Of Physics [0757707] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [0757975] Funding Source: National Science Foundation
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The fabrication and characterization of light-emitting one-dimensional photonic quasicrystals based on excitonic resonances is reported. The structures consist of high-quality GaAs/AlGaAs quantum wells grown by molecular-beam epitaxy with wavelength-scale spacings satisfying a Fibonacci sequence. The polaritonic (resonant light-matter coupling) effects and light emission originate from the quantum well excitonic resonances. Measured reflectivity spectra as a function of detuning between emission and Bragg wavelength are in good agreement with excitonic polariton theory. Photoluminescence experiments show that active photonic quasicrystals, unlike photonic crystals, can be good light emitters: While their long-range order results in a stopband similar to that of photonic crystals, the lack of periodicity results in strong emission. (C) 2008 Optical Society of America
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