IBS CMSD Seminar_Dr. Kyoung-Duck Park (POSTECH)(Jan. 10, 2023)
IBS Center for Molecular Spectroscopy and Dynamics
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n SPEAKER
Dr. Kyoung-Duck Park (Department of Physics, Pohang
University of Science and Technology)
n TITLE
Tip-enhanced
cavity-spectroscopy
n ABSTRACT
Structure, functions, dynamics, and
interactions are the basic properties to systematically understand physical
systems existing in nature. In particular, there have been many scientific
adventures to understand light-matter interactions, yet in the classical regime
at the microscale due to the diffraction-limited optical resolution. Recently,
plasmonic nano-cavity enables to induce light-matter interactions and
tip-enhanced nano-spectroscopy enables to probe them at the nanoscale [1-3].
However, these two approaches have developed independently with their own
weaknesses so far. In this talk, I provide a novel concept of “tip-enhanced
cavity-spectroscopy (TECS)” overcoming the limitations of previous approaches
to induce, probe, and dynamically control ultrastrong light-matter interactions
in the quantum tunneling regime [4, 5]. Furthermore, I provide several new
directions of nano-spectroscopy and -imaging, which have not been thought in
the near-field optics community before. First, we exploit extremely high
tip-pressure (~GPa scale) to directly modify the lattice structure and
electronic properties of materials [6, 7]. Second, we dynamically control the
near-field polarization by adopting adaptive optics technique to near-field
optics [8]. Third, we develop conductive TECS to modify electrical properties
of materials by directly flowing an electric current through the cavity
junction. In addition, in the last part of this talk, I present specific
research directions of our group in the fields of cavity quantum optics,
plexciton condensate, quantum molecular physics, and quantum nonlinear optics,
which can be enabled through the TECS approach.
n DATE AND VENUE
January 10, 2023 (Tuesday, 11:00 - 12:00)
Seminar Room A (116)
n LANGUAGE
Korean
n INVITED BY
Dr. Kwang Jin Lee