Waveguide integration of a > 4.7-THz quantum-cascade laser

Waveguide integration of a > 4.7-THz quantum-cascade laser

Waveguide integration of terahertz quantum cascade lasers (THzQCLs) is demonstrated at frequencies above 4.7 THz. A precision micromachining technique, followed by diamond-turning and electroless-plating has been used to manufacture hollow rectangular waveguides with integrated diagonal feedhorns. I...

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Hauptverfasser: Nuttall, E, Han, Y, Pardo, D, Kondawar, S, Brewster, N, Salih, M, Li, L, Horbury, M, Davies, AG, Linfield, E, Wang, H, Dean, P, Ellison, B, Valavanis, A
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Sprache:eng
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Zusammenfassung:Waveguide integration of terahertz quantum cascade lasers (THzQCLs) is demonstrated at frequencies above 4.7 THz. A precision micromachining technique, followed by diamond-turning and electroless-plating has been used to manufacture hollow rectangular waveguides with integrated diagonal feedhorns. It is shown that surface roughness at the≈1μm level is achieved, enabling outcoupling of radiation in the4.75–5.05 THz band, with a divergence angle of
DOI:10.1049/ell2.12703