  A CMY colour camera differs from its RGB counterpart in that it employs a
subtractive colour space of cyan, magenta and yellow. CMY cameras tend to
performs better than RGB cameras in low light conditions due to their much
higher transmittance. However, conventional CMY colour filter technology made
of pigments and dyes are limited in performance for the next generation image
sensors with submicron pixel sizes. These conventional filters are difficult to
fabricate at nanoscale dimensions as they use their absorption properties to
subtract colours. This paper presents a CMOS compatible nanoscale thick CMY
colour mosaic made of Al-TiO2-Al nanorods forming an array 0.82 million colour
pixels of 4.4 micron each, arranged in a CMYM pattern. The colour mosaic was
then integrated onto a MT9P031 monochrome image sensor to make a CMY camera and
the colour imaging demonstrated using a 12 colour Macbeth chart. The developed
technology will have applications in astronomy, low exposure time imaging in
biology and photography.
