2019/02/26 by Kyoung‐Duck Park, Molly A. May, Park, Kyoung-Duck +13 · 8 citations
Engineering · #FOS: Physical sciences #Near-Field Optical Microscopy #Optics (physics.optics) #Photonic and Optical Devices #Plasmonic and Surface Plasmon Research
paper · pdf · doi:10.48550/arxiv.1902.10314
openalex publication_date 2019/02/26 · openalex created_date 2022/07/29 · openalex updated_date 2026/07/28
Optical cavities can enhance and control light-matter interactions. This has\nrecently been extended to the nanoscale, and with single emitter strong\ncoupling regime even at room temperature using plasmonic nano-cavities with\ndeep sub-diffraction-limited mode volumes. However, with emitters in static\nnano-cavities, this limits the ability to tune coupling strength or to couple\ndifferent emitters to the same cavity. Here, we present tip-enhanced strong\ncoupling (TESC) spectroscopy, imaging, and control. Based on a nano-cavity\nformed between a scanning plasmonic antenna-tip and the substrate, by\nreversibly and dynamically addressing single quantum dots (QDs) we observe mode\nsplitting > 160 meV and anticrossing over a detuning range of ~100 meV, and\nwith sub-nm precision control over the mode volume in the ~1000 nm3 regime.\nOur approach, as a new paradigm of nano-cavity quantum-electrodynamics\nnear-field microscopy to induce, probe, and control single-emitter plasmon\nhybrid quantum states, opens new pathways from opto-electronics to quantum\ninformation science.\n