Patent ID: 8232517

Claim:
A wavelength-sensitive detector comprising a first photoconductor unit and a second photoconductor unit on a substrate; wherein a plane of the first photoconductor unit and a plane of the second photoconductor unit are substantially parallel to each other and are substantially perpendicular to a plane of the substrate; wherein each photoconductor unit comprises a first electrode having a first longitudinal direction and a first sidewall lying in a first plane parallel with the first longitudinal direction and a second electrode having a second longitudinal direction and a second sidewall lying in a second plane parallel with said second longitudinal direction; wherein the first photoconductor unit comprises a plurality of first type elongate nanostructures positioned in between the first electrode and the second electrode of the first photoconductor unit, the elongate nanostructures each having a longitudinal axis, wherein the longitudinal axes of the first type elongate nanostructures are substantially parallel to each other and are substantially perpendicular to a plane of the first electrode and a plane of the second electrode of the first photoconductor unit; and wherein the second photoconductor unit comprises a plurality of second type elongate nanostructures positioned in between the first electrode and the second electrode of the second photoconductor unit, the elongate nanostructures each having a longitudinal axis, wherein the longitudinal axes of the second type elongate nanostructures are substantially parallel to each other and are substantially perpendicular to a plane of the first electrode and a plane of the second electrode of the second photoconductor unit, wherein the first type elongate nanostructures are different from the second type elongate nanostructures, wherein the detector is configured to determine a polarization of incident radiation, and wherein the first photoconductor unit comprises the first type elongated nanostructures oriented in a first direction and the second photoconductor unit comprises the second type elongated nanostructures oriented in a second direction, wherein the first direction and the second direction are substantially perpendicular to each other, and wherein the first photoconductor unit and the second photoconductor unit are stacked next to each other on the substrate.