Controlled manipulation of quantum dots with nanometer precision is an essential capability for basic science as well as for scalable engineering of nanophotonic and nanoelectronic devices. The most common methods for manipulation of particles use optical or dielectric trapping forces which scale poorly with particle size, making it difficult to manipulate single quantum dots. Here we demonstrate a particle manipulation technique that achieves nanometer positioning by controlling the flow of the surrounding liquid. This approach scales much more favorable with particle size, enabling us to position colloidal quantum dots to within the best positioning accuracies reported to date. Using this approach we demonstrate the capture, quantum optical characterization, and manipulation of individually selected single quantum dots with up to 45.5 nm precision for times exceeding one hour.
Citation: Nano Letters
Pub Type: Journals