Artificial Dielectric Beam-scanning Prism for the Terahertz Region
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.
- Year: 2023
- Tag: science, radar, scanning, stealth
- Author: Karl Strecker, Mathew Otto, Masaya Nagai, John. F O'Hara, Rajind Mendis
- Released: Scientific Reports
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Rajind Mendis
Dr. Rajind Mendis is a Senior Research Scientist in the OIC and has been with Riverside Research since 2019. Prior to joining Riverside Research, he was a Research Professor at Brown University, and has over 27 years of research experience in THz Science and Technology.
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