Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 93: Plasmonics & Nanooptics VI: Near-Field Microscopy and Phenomena
O 93.7: Vortrag
Freitag, 5. April 2019, 12:00–12:15, H8
Revisiting the Dipole Model for a Thermal Infrared Near-Field Spectroscope — •Florian Herz1, Zhenghua An2, Susumu Komiyama3, and Svend-Age Biehs1 — 1Institut für Physik, Carl von Ossietzky Universität, 26111 Oldenburg, Germany — 2State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonics Structures (Ministry of Education), Department of Physics, Fudan University, Shanghai 200433, Peoples Republic of China — 3Department of Basic Science, The University of Tokyo, Komaba 3-8-1, Meguro-ku, Tokyo 153-8902, Japan
I will present our work on determining the scattered near-field and directly emitted power of a heated spherical nanoparticle above a sample within the framework of fluctuational electrodynamics using the dipole approximation. Additionally, for a configuration of a nanoparticle heated with respect to its environment, I show that the scattered power of the near field of the sample is strictly zero. Hence, applied on the interpretation of near-field imaging setups like thermal infrared near-field spectroscopy not only the scattering of the near field but also the direct emission of the tip has to be considered.
Reference: Florian Herz, Zhenghua An, Susumu Komiyama, and Svend-Age Biehs: Revisiting the Dipole Model for a Thermal Infrared Near-Field Spectroscope, in Phys. Rev. Applied 10, 044051 (2018).