Photodetector - A physical device used to capture a single color value (for a Bayer camera there is one of these per pixel location, the X3 sensor has three per pixel location) ...
Infrared photodetectors can be created with structures of high band gap semiconductors such as in Quantum well infrared photodetectors.
A number of superconducting and non-superconducting cooled bolometer technologies exist.
X3 technology, for example, embeds red, green and blue photodetectors in silicon. Some of the more advanced cameras subtract values using the typesetting colors cyan, yellow, green and magenta instead of blending red, green and blue.
Certainly CCDs and CMOS sensors, which both use silicon photodetectors, are intrinsically UV sensitive. Whether any manufacturers us a UV blocking filter I don't know. Most (all?) use IR blocking filters.
 See also: Sensor, Sensors, Stand, Color, Image
  
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