Multi-band integrated Quantum Well Infrared Photodetectors

A multi-band integrated quantum well infrared photodetector chip has been demonstrated with the peak wavelengths in seven bands modulated from 13.0 to $15.2 \mu \mathrm{m}$ . The wavelength modulation is realized by changing the top metal patch width of the metal-insulator-metal plasmonic microcavity coupling structures, due to the dependence of the resonant peak wavelength upon the patch width. This might provide a new way for multispectral imaging focal plane arrays.