Spectroscopic Measurements of Optical Components Around 1 Terahertz

Computer Science – Performance

Scientific paper

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Scientific paper

Recent advances in submillimeter SIS receivers necessitate the use of very-low-loss components in order to achieve their theoretical performance. Additionally, as HEB and thermal bolometer instruments become more sensitive, better infrared blocking filters are needed. Often these optical elements will be cooled to 4K, where their properties are less well measured. We present measurements of the effectiveness of dielectric antireflection coatings on quartz at 4K over the frequency range 0.3 to 1.6 THz. Absorption coefficients for materials used as infrared blocks are presented. Studies of the transmission of other optical components are discussed.

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