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- Title
Artificial dielectric beam-scanning prism for the terahertz region.
- Authors
Strecker, Karl; Otto, Matthew; Nagai, Masaya; O'Hara, John F.; Mendis, Rajind
- Abstract
We design and fabricate an artificial dielectric prism that can steer a terahertz beam in space and experimentally investigate its behavior. The artificial dielectric medium consists of a uniformly spaced stack of metal plates, electromagnetically equivalent to an array of parallel-plate waveguides operating in tandem. At an operating frequency of 0.3 THz, we observe a maximum beam deflection of 29°, limited by the precision of the available spacers. Spring-loading the spacers between the plates allow us to scan the beam continuously and dynamically over a range of 5°. The measured beam intensity maps at the input and output of the device reveal very good Gaussian beam quality and an estimated power efficiency of 71%. As a possible real-world application, we integrate the prism into the path of a free-space terahertz communication link and demonstrate unimpaired performance.
- Subjects
PARALLEL-plate waveguides; DIELECTRICS; DIELECTRIC waveguides; PRISMS; GAUSSIAN beams; BEAM steering
- Publication
Scientific Reports, 2023, Vol 13, Issue 1, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/s41598-023-41046-z