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arXiv · 1902.10314

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

Kyoung-Duck Park·Molly A. May·Haixu Leng·Jiarong Wang·Jaron A. Kropp·Theodosia Gougousi·Matthew Pelton·Markus B. Raschke
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Abstract

Optical cavities can enhance and control light-matter interactions. This has recently been extended to the nanoscale, and with single emitter strong coupling regime even at room temperature using plasmonic nano-cavities with deep sub-diffraction-limited mode volumes. However, with emitters in static nano-cavities, this limits the ability to tune coupling strength or to couple different emitters to the same cavity. Here, we present tip-enhanced strong coupling (TESC) spectroscopy, imaging, and control. Based on a nano-cavity formed between a scanning plasmonic antenna-tip and the substrate, by reversibly and dynamically addressing single quantum dots (QDs) we observe mode splitting > 160 meV and anticrossing over a detuning range of ~100 meV, and with sub-nm precision control over the mode volume in the ~1000 nm^3 regime. Our approach, as a new paradigm of nano-cavity quantum-electrodynamics near-field microscopy to induce, probe, and control single-emitter plasmon hybrid quantum states, opens new pathways from opto-electronics to quantum information science.

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Kyoung-Duck Park, Molly A. May, Haixu Leng, Jiarong Wang, Jaron A. Kropp, Theodosia Gougousi, Matthew Pelton, Markus B. Raschke. 2019-02-27. Tip-enhanced strong coupling spectroscopy, imaging, and control of a single quantum emitter. https://arxiv.org/abs/1902.10314

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