Single-step fabrication of thin-film linear variable bandpass filters based on metal-insulator-metal geometry
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Peer-reviewed
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Article
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Abstract
A single-step fabrication method is presented for ultra-thin, linearly variable optical bandpass filters (LVBFs) based on a metal–insulator–metal arrangement using modified evaporation deposition techniques. This alternate process methodology offers reduced complexity and cost in comparison to conventional techniques for fabricating LVBFs. We are able to achieve linear variation of insulator thickness across a sample, by adjusting the geometrical parameters of a typical physical vapor deposition process. We demonstrate LVBFs with spectral selectivity from 400 to 850 nm based on Ag (25 nm) and MgF
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0910 Manufacturing Engineering
Journal Title
Applied Optics
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Journal ISSN
1559-128X
1539-4522
1539-4522
Volume Title
55
Publisher
Optical Society of America
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Sponsorship
Engineering and Physical Sciences Research Council (EP/L015455/1)
EPSRC (1241027)
EPSRC (1241027)
Engineering and Physical Sciences Research Council (EPSRC) (EP/L015455/1); Cambridge Commonwealth, European and International Trust.