Photonic Crystal Enhanced Wavelength Selective, Multi-Colour Quantum Dot Infrared Photodetectors

Photonic crystals are poised to be the dominant driving force behind the technical innovation of new optoelectronic devices due to their ability to guide and control light propagation. By controlling their feature size and periodicity, they may be used as notch filters where their transmission peaks can be tuned. Couple this to a quantum dot infrared photodetector would not only enhance the detector s performance but the device will now detect a narrow band around the desired frequency. This project aims to integrate these two components to achieve multi-colour detectivity. This technology will lead to advanced applications in spectral imaging, remote sensing, environmental/pollution monitoring, gas and bio-hazardous material detection.