| Autor: |
Wallis, R, Innocenti, RD, Jessop, DS, Mitrofanov, O, Bledt, CM, Melzer, JE, Harrington, JA, Beere, HE, Ritchie, DA |
| Přispěvatelé: |
Beere, Harvey [0000-0001-5630-2321], Ritchie, David [0000-0002-9844-8350], Apollo - University of Cambridge Repository |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
|
| DOI: |
10.17863/cam.7487 |
| Popis: |
The field of terahertz (THz) waveguides continues to grow rapidly, with many being tailored to suit the specific demands of a particular final application. Here, we explore waveguides capable of enabling efficient and accurate power delivery within cryogenic environments (< 4 K). The performance of extruded hollow cylindrical metal waveguides made of un-annealed and annealed copper, as well as stainless steel, have been investigated for bore diameters between 1.75 - 4.6 mm, and at frequencies of 2.0, 2.85 and 3.4 THz, provided by a suitable selection of THz quantum cascade lasers. The annealed copper resulted in the lowest transmission losses, < 3 dB/m for a 4.6 mm diameter waveguide, along with 90° bending losses as low as ~2 dB for a bend radius of 15.9 mm. The observed trends in losses were subsequently analyzed and related to measured inner surface roughness parameters. These results provide a foundation for the development of a wide array of demanding low-temperature THz applications, and enabling the study of fundamental physics. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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