Terahertz filter integrated with a subwavelength structured antireflection coating | Zendy

Jeong Min Woo | Zendy; DaeSeon Kim | Zendy; DongJu Kim | Zendy; JaeHyung Jang | Zendy

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Terahertz filter integrated with a subwavelength structured antireflection coating

Author(s) -

Jeong Min Woo,

DaeSeon Kim,

DongJu Kim,

JaeHyung Jang

Publication year - 2015

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4939571

Subject(s) - terahertz radiation , materials science , optics , coating , optoelectronics , substrate (aquarium) , anti reflective coating , etching (microfabrication) , filter (signal processing) , optical filter , lithography , nanotechnology , physics , layer (electronics) , geology , computer science , computer vision , oceanography

Micro-pyramid shaped subwavelength structures (SWSs) were integrated on both sides of a terahertz (THz) filter by means of stamping methods. Two silicon-based stamping molds fabricated via crystallographic wet etching were utilized to replicate SWSs onto cyclo-olefin copolymer (COC) films coated onto both sides of a THz filter at the same time. The SWSs act as an broadband antireflection coating to reduce the surface reflection loss in a frequency range of 0.2 THz to 1.4 THz. Compared to a THz filter without SWSs, the filter integrated with double-sided SWSs exhibits a low standing wave ratio inside the substrate and THz signal transmission enhancement of up to 10.8%

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