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Tip-enhanced Strong Coupling: Broadband Room Temperature Nano-cavity QED with Single Emitters

Invited

Abstract

Optical cavities can enhance and control the light-matter interaction by modifying the local electromagnetic environment of a quantum emitter. However, large cavity mode volumes have prevented strong coupling of single emitters under ambient conditions. We demonstrate tip-enhanced strong coupling (TESC) spectroscopy, imaging, and control based on scanning probe microscopy using plasmonic antenna-tips forming a nano-cavity with the emitter [1]. With single quantum dots we observe room temperature mode splitting up to 160 meV with nanometer scale mode confinement and atomic precision spatial control [2]. In the extension to the infrared we control molecular vibrations through configurable optical interactions of a nanotip with quantum interference [3] and Purcell enhancement >10^6 [4]. This work establishes a new paradigm of nano-cavity QED for coherent control of quantum states in solid state emitters and at room temperature. [1] K-D Park et al., Nat. Nanotechnol. 13, 59 (2018). [2] K.-D. Park et al., Science Adv. 5, eaav5931 (2019). [3] E. A. Muller, et al., ACS Photonics 5, 3594 (2018). [4] B. Metzger et al., Phys. Rev. Lett. 123, 153001 (2019).

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Presenters

  • Markus B. Raschke

    University of Colorado, Boulder, Physics and Chemistry, University of Colorado, Boulder, University of Colorado Boulder, Department of Physics, Department of Chemistry, and JILA, University of Colorado - Boulder, Department of Physics, Department of Chemistry and JILA, University of Colorado, Boulder, Department of Physics, Department of Chemistry, and JILA, University of Colorado, Boulder, Physics, University of Colorado, Boulder, Physics, Chemistry, and JILA, University of Colorado, Boulder

Authors

  • Markus B. Raschke

    University of Colorado, Boulder, Physics and Chemistry, University of Colorado, Boulder, University of Colorado Boulder, Department of Physics, Department of Chemistry, and JILA, University of Colorado - Boulder, Department of Physics, Department of Chemistry and JILA, University of Colorado, Boulder, Department of Physics, Department of Chemistry, and JILA, University of Colorado, Boulder, Physics, University of Colorado, Boulder, Physics, Chemistry, and JILA, University of Colorado, Boulder