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        Strong terahertz absorption using thin metamaterial structures

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        Author
        Alves, Fabio
        Kearney, Brian
        Grbovic, Dragoslav
        Lavrik, Nickolay V.
        Karunasiri, Gamani
        Date
        2012-01-01
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        Abstract
        Metamaterial absorbers with nearly 100% absorption in the terahertz (THz) spectral band have been designed and fabricated using a periodic array of aluminum (Al) squares and an Al ground plane separated by a thin silicon dioxide (SiO{sub 2}) dielectric film. The entire structure is less than 1.6 mm thick making it suitable for the fabrication of microbolometers or bi-material sensors for THz imaging. Films with different dielectric layer thicknesses exhibited resonant absorption at 4.1, 4.2, and 4.5 THz with strengths of 98%, 95%, and 88%, respectively. The measured absorption spectra are in good agreement with simulations using finite element modeling.
        Description
        The article of record as published may be found at http://dx.doi.org/10.1063/1.3693407
        Rights
        This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
        URI
        http://hdl.handle.net/10945/57267
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          Ultrasonic absorption in crystalline benzene 

          Alexander, Howard Wright; Elmore, John E. (Monterey, California: U.S. Naval Postgraduate School, 1963);
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          Laser light absorption characteristics of a laser produced hydrogen plasma 

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