期刊
OPTICS EXPRESS
卷 19, 期 2, 页码 1122-1130出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.19.001122
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- NG-Lab of the Italian Ministry of Research
- Fondazione Monte dei Paschi di Siena
We demonstrate that azimuthally polarized surface emitting Terahertz quantum cascade lasers fabricated in a micro-ring resonator geometry can be coupled to cylindrical hollow aluminum waveguides reaching efficiencies as high approximate to 98%, when a collimating lens is used. By placing the waveguide in close contact with the QCL in a simple back-to-back geometry, the laser mode can be perfectly matched with the low loss TE(01) waveguide mode showing attenuation losses as low as approximate to 2.3-2.7 dB/m at 3.2 THz. (C) 2011 Optical Society of America
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