McKerracher, Ian; Fu, Lan; Jagadish, Chennupati; Tan, Hark Hoe
Quantum dot infrared photodetectors can be coupled with micro-structured filters to create narrowband sensors. Guided-mode resonance filters based on a high-index dielectric slab can exhibit bandpass characteristics that are suitable for monolithic integration with focal-plane arrays. Here, patterned Ge filters were integrated with InGaAs/GaAs quantum dot detectors to linearly tune their 77 K photoresponse peaks from 5.6 μm to 6.2 μm. The dark current was not influenced by these filters but the...[Show more]
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