EnglishWe 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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http://hdl.handle.net/11568/495157| Autori: | |
| Autori: | Vitiello M. S.; Xu J.-H.; Kumar M.; Beltram F.; Tredicucci A.; Mitrofanov O.; Beere H. E.; Ritchie D. A. |
| Titolo: | High efficiency coupling of Terahertz micro-ring quantum cascade lasers to the low-loss optical modes of hollow metallic waveguides |
| Anno del prodotto: | 2011 |
| Digital Object Identifier (DOI): | 10.1364/OE.19.001122 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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