Fabrication of terahertz wire-grid polarizers

Fabrication of terahertz wire-grid polarizers

Wire-grid polarizers for terahertz region were fabricated by manufacturing triangular grating using a ruling-based, ultraprecision diamond machining process and replicating the pattern into polymethylpentene (TPX) and cyklo-olefin copolymer (COC) sheets using hot embossing. On top of the imprinted s...

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Veröffentlicht in:Applied optics (2004) 2012-12, Vol.51 (35), p.8360-8365
Hauptverfasser: Partanen, Anni, Väyrynen, Juha, Hassinen, Sami, Tuovinen, Hemmo, Mutanen, Jarkko, Itkonen, Tommi, Silfsten, Pertti, Pääkkönen, Pertti, Kuittinen, Markku, Mönkkönen, Kari, Venäläinen, Tapani
Format: Artikel
Sprache:eng
Schlagworte:
Aluminum
Bedding
Copolymers
Diffraction gratings
Evaporation
Gratings (spectra)
Polarizers
Wire
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Beschreibung
Zusammenfassung:Wire-grid polarizers for terahertz region were fabricated by manufacturing triangular grating using a ruling-based, ultraprecision diamond machining process and replicating the pattern into polymethylpentene (TPX) and cyklo-olefin copolymer (COC) sheets using hot embossing. On top of the imprinted structures, aluminum was evaporated in an oblique angle, forming an aluminum wire grid. The achieved extinction rate was over 150 for TPX polarizers and near 1000 for COC polarizers.
ISSN:1559-128X
2155-3165
1539-4522
DOI:10.1364/AO.51.008360