Tip-enhanced strong coupling spectroscopy, imaging, and control of a single quantum emitter

Author
Abstract
Optical cavities can enhance and control light-matter interactions. This level of control has recently been extended to the nanoscale with single emitter strong coupling even at room temperature using plasmonic nanostructures. However, emitters in static geometries, limit the ability to tune the coupling strength or to couple different emitters to the same cavity. Here, we present tip-enhanced strong coupling (TESC) with a nanocavity formed between a scanning plasmonic antenna tip and the substrate. By reversibly and dynamically addressing single quantum dots, we observe mode splitting up to 160 meV and anticrossing over a detuning range of ~100 meV, and with subnanometer precision over the deep subdiffraction-limited mode volume. Thus, TESC enables previously inaccessible control over emitter-nanocavity coupling and mode volume based on near-field microscopy. This opens pathways to induce, probe, and control single-emitter plasmon hybrid quantum states for applications from optoelectronics to quantum information science at room temperature.
Year of Publication
2019
Journal
Science Advances
Volume
5
Number of Pages
eaav5931
Date Published
2019-07
URL
https://advances.sciencemag.org/content/5/7/eaav5931
DOI
10.1126/sciadv.aav5931
JILA PI
Journal Article