Resonance fluorescence from a telecom-wavelength quantum dot

Resonance fluorescence from a telecom-wavelength quantum dot

Spin-resolved quantum-dot resonance fluorescence

Confined spins in self-assembled semiconductor quantum dots promise to serve both as probes for studying mesoscopic physics in the solid state and as stationary qubits for quantum-information science1–7. Moreover, the excitations of self-assembled quantum dots can interact with nearinfrared photons, providing an interface between stationary and ‘flying’ qubits. Here, we report the observation o...

Interference with a quantum dot single-photon source and a laser at telecom wavelength

Fluorescence Resonance Energy Transfer in Quantum Dot-Protein Kinase Assemblies

In search of viable strategies to identify selective inhibitors of protein kinases, we have designed a binding assay to probe the interactions of human phosphoinositide-dependent protein kinase-1 (PDK1) with potential ligands. Our protocol is based on fluorescence resonance energy transfer (FRET) between semiconductor quantum dots (QDs) and organic dyes. Specifically, we have expressed and puri...

Single-molecule quantum-dot fluorescence resonance energy transfer.

Colloidal semiconductor quantum dots are promising for single-molecule biological imaging due to their outstanding brightness and photostability. As a proof of concept for single-molecule fluorescence resonance energy transfer (FRET) applications, we measured FRET between a single quantum dot and a single organic fluorophore Cy5. DNA Holliday junction dynamics measured with the quantum dot/Cy5 ...