Nick Vamivakas

Spectral tunability of a plasmonic antenna with a dielectric nanocrystal

We show that the positioning of a nanometer length scale dielectric object, such as a diamond nanocrystal, in the vicinity of a gold bowtie nanoantenna can be used to tune the plasmonic mode spectrum on the order of a linewidth. We further show that the intrinsic luminescence of gold enhanced in the presence of nanometer-scale roughness couples efficiently to the plasmon mode and carries the same polarization anisotropy. Our findings have direct implications for cavity quantum electrodynamics related applications of hybrid antenna-emitter complexes.

Optical Readout of Quantum Dot Electron Spin

By monitoring the intermittency of resonance fluorescence from a quantum dot molecule we perform optical single-shot measurements of a resident electron’s spin. Two-laser experiments confirm the conditionality of the resonance fluorescence on the spin orientation.