Near-Field Physics and Chemistry in Plasmonic STM junctions

MPSD Seminar

  • Datum: 29.01.2020
  • Uhrzeit: 14:00 - 15:30
  • Vortragende(r): Takashi Kumagai
  • Fritz-Haber Institute of the Max-Planck Society, Berlin, Germany
  • Ort: CFEL (Bldg. 99)
  • Raum: Seminar Room V, O1.109
  • Gastgeber: Angel Rubio, Heiko Appel
  • Kontakt:
Plasmonic cavities exhibit many intriguing properties and phenomena resulting from strong field enhancement and confinement. Recently, both experimental and theoretical studies have revealed crucial roles of atomistic structures and quantum mechanical effects in plasmonic nanostructures [1-3].

However, the nature of an electromagnetic field confined to atomic-scale structures and the interaction between such an extreme field and matter remains poorly understood. Plasmonic STM junctions provide a unique opportunity to examine near-field-driven physics and chemistry on the atomic scale. I will discuss our recent studies on near-field physics and chemistry in plasmonic STM junctions, including near-field-induced chemical reactions [4,5], plasmon assisted
resonant electron transfer [6], engineering of localized surface plasmon resonance in STM junctions [7], and tip-enhanced resonance Raman spectroscopy [8].

[1] Benz et al. Science 354, 726 (2016).
[2] Zhang et al. Phys. Rev. B 90, 161407(R) (2014).
[3] Urbieta et al. ACS Nano 12, 585 (2018).
[4] H. Böckmann et al. Nano Lett. 18, 152 (2018).
[5] H. Böckmann et al. J. Phys. Chem. Lett. 10, 2068 (2019).
[6] S. Liu et al. Phys. Rev. Lett. 121, 226802 (2018).
[7] H. Böckmann et al. Nano Lett. 19, 3597 (2019).
[8] S. Liu et al. Nano Lett. 19, 5725 (2019).

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