title: Nanohole-array-based device for 2D snapshot multispectral imaging.
abstract: We present a two-dimensional (2D) snapshot multispectral imager that utilizes the optical transmission characteristics of nanohole arrays (NHAs) in a gold film to resolve a mixture of input colors into multiple spectral bands. The multispectral device consists of blocks of NHAs, wherein each NHA has a unique periodicity that results in transmission resonances and minima in the visible and near-infrared regions. The multispectral device was illuminated over a wide spectral range, and the transmission was spectrally unmixed using a least-squares estimation algorithm. A NHA-based multispectral imaging system was built and tested in both reflection and transmission modes. The NHA-based multispectral imager was capable of extracting 2D multispectral images representative of four independent bands within the spectral range of 662 nm to 832 nm for a variety of targets. The multispectral device can potentially be integrated into a variety of imaging sensor systems.
authors.affiliation: The School of Engineering Science, Simon Fraser University, Burnaby, BC, Canada.
authors.forename: Mohamadreza
authors.initials: M
authors.lastname: Najiminaini
authors.forename: Fartash
authors.initials: F
authors.lastname: Vasefi
authors.forename: Bozena
authors.initials: B
authors.lastname: Kaminska
authors.forename: Jeffrey J L
authors.initials: JJ
authors.lastname: Carson
mesh_terms: D003124:Colorimetry / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007089:Image Enhancement / Q000295:instrumentation*; D058608:Nanopores / Q000648:ultrastructure*; D036103:Nanotechnology / Q000295:instrumentation*; D010781:Photography / Q000295:instrumentation*