Mid- to long-wave infrared computational spectroscopy using a subwavelength coaxial aperture array
Benjamin J Craig, Jiajun Meng, Vivek Raj Shrestha, Jasper J Cadusch, Kenneth B Crozier
Scientific Reports | Nature Publishing Group | Published : 2019
Miniaturized spectrometers are advantageous for many applications and can be achieved by what we term the filter-array detector-array (FADA) approach. In this method, each element of an optical filter array filters the light that is transmitted to the matching element of a photodetector array. By providing the outputs of the photodetector array and the filter transmission functions to a reconstruction algorithm, the spectrum of the light illuminating the FADA device can be estimated. Here, we experimentally demonstrate an array of 101 band-pass transmission filters that span the mid- to long-wave infrared (6.2 to 14.2 μm). Each filter comprises a sub-wavelength array of coaxial apertures in ..View full abstract
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Awarded by Defense Advanced Research Projects Agency (DARPA)
Awarded by Australian Research Council
This work was supported by the Defense Advanced Research Projects Agency (DARPA) (HR0011-16-1-0004), by the Australian Research Council (DP150103736, DP180104141, and FT140100577) and by VESKI. Fabrication was performed in part at the Melbourne Centre for Nanofabrication (MCN) in the Victorian Node of the Australian National Fabrication Facility (ANFF). K.B.C. acknowledges support from the MCN Technology Fellow Ambassador Program.