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Nanoscale Quantum Dot Photodetectors with High Spatial Resolution and Sensitivity

Lih Lin, University of Washington

(Session : Thursday from )

Abstract. Three-dimensionally confined nanoparticles that harvest strong near-field interaction with light, such as colloidal quantum dots (QD), have opened new directions in nanophotonic devices and integration. This presentation will focus on our recent work in nanoscale QD photodetectors. The photodetector consists of a pair of electrodes spaced nanometers apart with colloidal QDs in between. The detection area is defined by the electric field across the nanogap, thus achieving high spatial resolution. Through optimizing the material and fabrication, we demonstrated sensitivity and bandwidth higher than prior work in nanoscale photodetection.