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Hollow metallic waveguides for beam shaping THz QCL

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Publication date13/11/2014
Host publication2014 39th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2014
PublisherIEEE Computer Society
Number of pages2
ISBN (Electronic)9781479938773
<mark>Original language</mark>English
Event39th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2014 - Tucson, United States
Duration: 14/09/201419/09/2014

Conference

Conference39th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2014
Country/TerritoryUnited States
CityTucson
Period14/09/1419/09/14

Conference

Conference39th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2014
Country/TerritoryUnited States
CityTucson
Period14/09/1419/09/14

Abstract

We have realized a compact beam-shaping and collimating element for a double metal terahertz (THz) quantum cascade laser (QCL) emitting around 2.9 THz using directly integrated hollow metallic waveguides. Our approach allowed us to efficiently improve the beam profile with respect to the standard emission pattern observed out of a double metal QCL. The Gaussian-like mode profile emerging from the metallic waveguides also exhibited a remarkable degree of collimation. The other laser characteristics such as the total output power and maximal operational temperature were marginally affected.