Terahertz polarizing component on cyclo-olefin polymer

Antonio Ferraro, Dimitrios C. Zografopoulos, Roberto Caputo, Romeo Beccherelli

Abstract


Wire-grid polarizers constitute a traditional component for the control of polarization in free-space devices that operate in a broad part of the electromagnetic spectrum. Here, we present an aluminium-based THz wire grid polarizer, fabricated on a sub-wavelength thin flexible and conformal foil of Zeonor polymer having a thickness of 40um. The fabricated device,characterized by means of THz time-domain spectroscopy, exhibitsa high extinction ratio between 30 and 45dB in the 0.3-2.1THz range. The insertion losses oscillate between 0 and 1.1dB andthey stemalmost exclusively from moderate Fabry-Perót reflections and it is engineered forvanishing at 2THz for operation with quantum cascade lasers.

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Photonics Letters of Poland - A Publication of the Photonics Society of Poland
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ISSN: 2080-2242