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Nanostructure-modulated planar high spectral resolution spectro-polarimeter

: Pjotr Stoevelaar, L.; Berzinš, J.; Silvestri, F.; Fasold, S.; Kamali, K.Z.; Knopf, H.; Eilenberger, F.; Setzpfandt, F.; Pertsch, T.; Bäumer, S.M.B.; Gerini, G.

Fulltext ()

Optics Express 28 (2020), No.14, pp.19818-19836
ISSN: 1094-4087
Journal Article, Electronic Publication
Fraunhofer IOF ()
berry phase; holograms; terahertz waves; Nanostructures; polarization

We present a planar spectro-polarimeter based on Fabry-Pérot cavities with embedded polarization-sensitive high-index nanostructures. A 7 µm-thick spectro-polarimetric system for 3 spectral bands and 2 linear polarization states is experimentally demonstrated. Furthermore, an optimal design is theoretically proposed, estimating that a system with a bandwidth of 127 nm and a spectral resolution of 1 nm is able to reconstruct the first three Stokes parameters with a signal-to-noise ratio of -13.14 dB with respect to the the shot noise limited SNR. The pixelated spectro-polarimetric system can be directly integrated on a sensor, thus enabling applicability in a variety of miniaturized optical devices, including but not limited to satellites for Earth observation.