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Composite reflective/absorptive IR-blocking filters embedded in metamaterial antireflection-coated silicon

Author(s): Munson, CD; Choi, SK; Coughlin, KP; Mcmahon, JJ; Miller, KH; et al

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dc.contributor.authorMunson, CD-
dc.contributor.authorChoi, SK-
dc.contributor.authorCoughlin, KP-
dc.contributor.authorMcmahon, JJ-
dc.contributor.authorMiller, KH-
dc.contributor.authorPage Jr., Lyman A-
dc.contributor.authorWollack, EJ-
dc.date.accessioned2018-07-20T15:10:22Z-
dc.date.available2018-07-20T15:10:22Z-
dc.date.issued2017-07-01en_US
dc.identifier.citationMunson, CD, Choi, SK, Coughlin, KP, Mcmahon, JJ, Miller, KH, Page, LA, Wollack, EJ. (2017). Composite reflective/absorptive IR-blocking filters embedded in metamaterial antireflection-coated silicon. APPLIED OPTICS, 56 (5349 - 5354. doi:10.1364/AO.56.005349en_US
dc.identifier.issn1559-128X-
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1qm31-
dc.description.abstractInfrared (IR)-blocking filters are crucial for controlling the radiative loading on cryogenic systems and for optimizing the sensitivity of bolometric detectors in the far-IR. We present a new IR filter approach based on a combination of patterned frequency-selective structures on silicon and a thin (25-75 mu m thick) absorptive composite based on powdered reststrahlen absorbing materials. For a 300 K blackbody, this combination reflects similar to 50% of the incoming light and blocks >99.8% of the total power with negligible thermal gradients and excellent low-frequency transmission. This allows a reduction in the IR thermal loading to negligible levels in a single cold filter. These composite filters are fabricated on silicon substrates, which provide excellent thermal transport laterally through the filter and ensure that the entire area of the absorptive filter stays near the bath temperature. A metamaterial antireflection coating cut into these substrates reduces in-band reflections to below 1%, and the in-band absorption of the powder mix is below 1% for signal bands below 750 GHz. This type of filter can be directly incorporated into silicon refractive optical elements. (C) 2017 Optical Society of Americaen_US
dc.format.extent5349 - 5354en_US
dc.language.isoenen_US
dc.relation.ispartofAPPLIED OPTICSen_US
dc.rightsAuthor's manuscripten_US
dc.titleComposite reflective/absorptive IR-blocking filters embedded in metamaterial antireflection-coated siliconen_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1364/AO.56.005349-
dc.date.eissued2017-06-22en_US
dc.identifier.eissn2155-3165-
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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