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Creators/Authors contains: "Nagai, Masaya"

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  1. ; ; ; ; (, Scientific Reports)
    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. 
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  2. ; ; ; ; (, Optics Letters)
  3. ; ; ; ; (, Optica)
  4. ; ; ; (, Scientific Reports)
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  5. ; ; ; ; (, Optics Express)