Journal
OPTICS EXPRESS
Volume 17, Issue 2, Pages 941-946Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.17.000941
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Funding
- Austrian Scientific Fund FWF (SFB-ADLIS, DK CoQuS)
- Austrian Nano Initiative project (PLATON)
- EC (POISE)
- Society for Microelectronics (GMe, Austria)
- Austrian Science Fund (FWF) [F 2503] Funding Source: researchfish
- Austrian Science Fund (FWF) [W1210] Funding Source: Austrian Science Fund (FWF)
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We present the design and the realization of active photonic crystal (PhC) semiconductor lasers. The PhC consists of semiconductor nanostructure pillars which provide gain at a quantized transition energy. The vertical layer sequence is that of a terahertz quantum cascade laser. Thereby, the artificial crystal itself provides the optical gain and the lateral confinement. The cavities do not rely on a central defect, the lasing is observed in flat-band regions at high symmetry points. The experimental results are in excellent agreement with the finite-difference time-domain simulations. For the vertical confinement a double-metal waveguide is used. The lasers are showing a stable single-mode emission under all driving conditions. Varying the period of the PhC allows to tune the frequency by 400 GHz. (C) 2008 Optical Society of America
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