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Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/74233

Type: Journal article
Title: Low-cost ultra-thin broadband terahertz beam-splitter
Author: Ung, B.
Fumeaux, C.
Lin, H.
Fischer, B.
Ng, B.
Abbott, D.
Citation: Optics Express, 2012; 20(5):4968-4978
Publisher: Optical Soc Amer
Issue Date: 2012
ISSN: 1094-4087
1094-4087
Statement of
Responsibility: 
Benjamin S.-Y. Ung, Christophe Fumeaux, Hungyen Lin, Bernd M. Fischer, Brian W.-H. Ng and Derek Abbott
Abstract: A low-cost terahertz beam-splitter is fabricated using ultra-thin LDPE plastic sheeting coated with a conducting silver layer. The beam splitting ratio is determined as a function of the thickness of the silver layer--thus any required splitting ratio can be printed on demand with a suitable rapid prototyping technology. The low-cost aspect is a consequence of the fact that ultra-thin LDPE sheeting is readily obtainable, known more commonly as domestic plastic wrap or cling wrap. The proposed beam-splitter has numerous advantages over float zone silicon wafers commonly used within the terahertz frequency range. These advantages include low-cost, ease of handling, ultra-thin thickness, and any required beam splitting ratio can be readily fabricated. Furthermore, as the beam-splitter is ultra-thin, it presents low loss and does not suffer from Fabry-Pérot effects. Measurements performed on manufactured prototypes with different splitting ratios demonstrate a good agreement with our theoretical model in both P and S polarizations, exhibiting nearly frequency-independent splitting ratios in the terahertz frequency range.
Keywords: Refractometry; Equipment Design; Equipment Failure Analysis; Interferometry; Computer-Aided Design; Terahertz Radiation
Rights: © Optical Society of America
RMID: 0020117097
DOI: 10.1364/OE.20.004968
Appears in Collections:Electrical and Electronic Engineering publications
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