Tip-enhanced strong coupling: Broadband room temperature cavity nano-optics with single emitter

报告题目：Tip-enhanced strong coupling: Broadband room temperature cavity nano-optics with single emitter

报告人：Markus B. Raschke 教授

主持人：武愕教授

时间：12月26日（周三）下午2:00

地点：理科大楼A814会议室

主办单位：精密光谱科学与技术国家重点实验室

报告摘要：

Optical cavities can enhance and control the light-matter interaction by modifying the local electromagnetic environment of a quantum emitter. Manipulating this interaction in the non-perturbative strong coupling regime opens new pathways from opto-electronic and chemical sensing to quantum information science. However, large cavity mode volumes have prevented strong coupling between dielectric cavities and 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 mod splitting up to 160 meV and anti-crossing in the energy spectra with detuning, with nanometer scale mode confinement [2].

In the extension to the infrared we achieve strong coupling of molecular vibrations through configurable optical interactions of a nanotip with an infrared resonant nanowire with hybridization and mode splitting. We observe nanotip-induced quantum interference of vibrational excitation pathways in spectroscopic nanoimaging, which we model classically as plasmonic electro-magnetically induced scattering as the phase-controlled extension of the classical analogue of electromagnetically induced transparency and absorption [2].

References

[1] K-D Park et al, Radiative control of dark excitons at room temperature by nano-optical antenna-tip Purcell effect, Nat. Nanotechnol. 13, 59 (2018).

[2] K.-D. Park, M. A. May, H. Leng, J. Wang, J. A. Kropp, T. Gougousi, M. Pelton, and M. B. Raschke, Tip-enhanced strong coupling spectroscopy and control of a single quantum emitter. (under review).

[3] E. A. Muller, B. Pollard, H. A. Bechtel, R. Adato, D. Etezadi, H. Altug, and M. B. Raschke, Nanoimaging and control of molecular vibrations through electromagnetically induced scattering reaching the strong coupling regime. ACS Photonics 5, 3594 (2018).

报告人简介：

EDUCATION AND PROFESSIONAL EXPERIENCE

University of Colorado

Department of Physics, Professor, since 2/2015, Associate Professor 2010-2014

Department of Chemistry, Affiliate Professor

JILA, Fellow Adjunct.

Research: Linear, nonlinear, and ultrafast near-field optics for imaging and spectroscopy with nanometer spatial and femtosecond temporal resolution: study and control of light-matter interaction on the nanoscale; engineering plasmonic structures for optical nanofocusing; single molecule spectroscopy; intra- and intermolecular electron and vibrational dynamics and coupling in molecular systems; and phase behavior, domains, and defects in 2D and correlated quantum materials.

University of Washington

Associate Professor of Chemistry 9/2009 – 8/2010, Adjunct Associate Professor of Physics 9/2007 – 8/2010, Assistant Professor of Chemistry 9/2006 – 8/2009

Max-Born-Institute, Berlin, Germany

Staff Scientist, Group Leader 1/2004 – 7/2006.

Postdoctoral Associate (Host: Prof. T. Elsaesser) 2002-2003.

Humboldt University, and Free University, Berlin, Germany

Instructor, Departments of Physics 2003 – 2006.

University of California at Berkeley

Postdoctoral Research Associate (Host: Prof. Y. R. Shen) 1999-2001.

Max-Planck-Institute for Quantum Optics, Garching, Germany

Technische Universität, Munich, Germany

Graduate Student, Ph.D. Physics (Advisors: U. Höfer & D. Menzel) 1995-1999.

Rutgers University

Fulbright Fellowship, M.S. Physics (Advisor: Prof. T. Madey) 1994 -1995

Universität Bayreuth, Germany

B.S.s (Vordiplom), Physics and Chemistry