Fritz-Haber Institute of the Max-Planck Society, Germany
Recent state of-the-art experimental and theoretical studies showed that plasmonic fields can be confined to a few nanometers and even down to atomic scale. Sophisticated experiments combining scanning tunneling microscopy with local optical detection and excitation (LT-photon-STM) now allow us to directly investigate microscopic mechanisms of plasmon-driven phenomena in plasmonic nano-gaps and also to perform optical spectromicroscopy at unprecedented spatial resolution.
In this talk, I will introduce the development of our home-built LT-photon-STM and discuss our recent studies on near-field physics in the plasmonic STM junction [1, 2, 3], including some fundamental plasmon-driven processes as well as high spatial resolution Raman spectroscopy [4, 5, 6]. Additionally, nano-scale resolved coherent phonon dynamics of ZnO layers will be shown.
1. S. Liu et al. Phys. Rev. Lett. 121, 226802 (2018).
2. H. Böckmann, S. Liu et al. Nano Lett. 19, 3597 (2019).
3. S. Liu et al. ACS Photonics, 8 (9), 2610-2617 (2021).
4. S. Liu et al. Nano Lett. 19, 5725 (2019).
5. S. Liu et al. Nano Lett. 20, 5879 (2020).
6. S. Liu et al. Nano Lett., 21, 9, 4057–4061, (2021).
Brief CV of Dr. Shuyi Liu:
Dr. Shuyi Liu focused on studying light matter interaction and ultrafast dynamics at atomic scale and surface physics/chemistry by scanning probe microscopy. He obtained his doctoral degree in physics in 2019, by the support of Max-Planck Fellowship, under the guidance of Dr. Takashi Kumagai and Prof. Martin Wolf, at Fritz-Haber Institute of the Max-Planck Society, Germany. After his doctoral study, he worked as a postdoc researcher at the same group. As a main contributor, he developed a new low temperature scanning tunneling microscope for local optical excitation and detection in his doctoral period, which aims at performing nanoscale optical spectroscopy and investigating near field physics/chemistry on crystal surface. Except that, his research involved development/application of local work function measurements, STM action spectroscopy for tautomerization and STM hydrogen junction for atomic resolution imaging. He was also granted “Chinese Government Award for Outstanding Self Finance Students Abroad 2019”.
Host: Prof. Jimin Zhao, State Key Lab for Surface Physics
Contact: Liu Yang（杨柳）
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