Design and manufacture of metal/dielectric long-wavelength cutoff filters

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DOIResolve DOI: http://doi.org/10.1364/AO.50.00C201
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TypeArticle
Journal titleApplied Optics
ISSN0003-6935
Volume50
Issue9
PagesC201C209
SubjectCutoff wavelengths; Dielectric layer; Long wavelength; Magnetron sputtering systems; Multilayer designs; Near-IR; Shorter wavelength; Thin-film interference; Transmission region; Design; Film preparation; Silver; Single mode fibers; Thin films; Wavelength
AbstractThin films of high reflecting metal, such as Ag, have a high reflectance in the long-wavelength region. When they are combined with dielectric layers, it is possible, through thin film interference effects, to induce transmission in certain shorter wavelength regions. Thus, they are useful components for the design of long-wavelength cutoff filters with a broad rejection region. In this paper, metal/dielectric multilayer designs based on this principle are numerically investigated. Three designs with different cutoff wavelengths and with very broad transmission regions in the visible or near-IR spectral ranges are presented. An excellent rejection on the long-wavelength side extends beyond 20 μm. Experimental results for one of the designs produced in our magnetron sputtering system are given. © 2010 Optical Society of America.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21271695
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Record identifier67e7fb60-c136-42cb-acd3-7223149b4e03
Record created2014-03-24
Record modified2016-05-09
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