Researchers at NIST are developing advanced measurement techniques to study light-matter interactions at the nanoscale, with potential applications in quantum computing and information processing. The team is focusing on two solid-state systems: cavity-quantum dot systems operating at telecommunications wavelengths.
The first system measures interactions between a single epitaxially-grown InAs quantum dot and a GaAs optical cavity, while the second system investigates an ensemble of solution-processed PbS nanocrystal quantum dots with a Si optical cavity. The researchers are using an optical fiber taper waveguide to probe these interactions, which could lead to new components for quantum information processing networks.
Key technical points:
– The team is working with nanoscale materials like quantum dots and optical cavities
– They are using cavity-enhanced optical spectroscopy to study light-matter interactions
– The fiber taper waveguide allows them to measure interactions between single quantum dots and optical cavities
– The research has potential applications in low-power optical switching, light-emitting devices, and quantum information processing
The team has already demonstrated strong coupling between a single InAs quantum dot and a GaAs optical cavity, and they are working on improving the efficiency, sensitivity, and stability of their measurements. They are also investigating the integration of silicon devices with PbS quantum dots for potential applications in classical and quantum information processing.
Keywords: Quantum Dot, Cavity Quantum Electrodynamics, Quantum Information Processing, Photoluminescence, Whispering Gallery Modes
