Marco Vallone

D03–Plasmonic nanorods for enhanced absorption in mid-wavelength infrared detectors

Vallone M., Goano M., Tibaldi A., Hanna S., Eich D., Wegmann A., Figgemeier H., Ghione G., Bertazzi F.

The absorption properties of HgCdTe based infrared detectors can be greatly increased in the mid-infrared band, by incorporating nanostructured plasmonic arrays on the illuminated detector face. The array periodicity, combined with the excitation of surface plasmon-polariton stationary modes, enhances the absorption efficiency by a substantial amount, allowing to reduce in turn the HgCdTe absorption thickness.