Kai Braun
University of Tübingen
58 Papers
308 Citations
Kai Braun is an academic researcher from University of Tübingen. The author has contributed to research in topics: Plasmon & Microscope. The author has an hindex of 14, co-authored 53 publications. Previous affiliations of Kai Braun include Hunan University.
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Papers
High-Resolution Spectroscopic Mapping of the Chemical Contrast from Nanometer Domains in P3HT:PCBM Organic Blend Films for Solar-Cell Applications
TL;DR: In this paper, a high-resolution near-field spectroscopic mapping technique is successfully applied to investigate the influence of thermal annealing on the morphology of a poly(3-hexylthiophene) and [6,6]-penyl-C 61 butyric acid methyl ester (P3HT:PCBM) blend film.
105
Parabolic mirror‐assisted tip‐enhanced spectroscopic imaging for non‐transparent materials
Dai Zhang,Xiao Wang,Kai Braun,Hans-Joachim Egelhaaf,Monika Fleischer,L. E. Hennemann,Holger Hintz,C. Stanciu,Christoph J. Brabec,Dieter P. Kern,Alfred J. Meixner +10 more
TL;DR: In this article, a parabolic mirror-assisted near-field optical microscope was used for spectroscopic imaging of poly(3hexythiophene)/[6, 6]-penyl-C61 butyric acid methyl ester (P3HT/PCBM) solar cell blend film.
96
Tailoring gold nanostructures for near-field optical applications
Monika Fleischer,Dai Zhang,Kai Braun,Sebastian Jäger,R. Ehlich,M. Häffner,C. Stanciu,J. K. H. Hörber,Alfred J. Meixner,Dieter P. Kern +9 more
TL;DR: A method of combined thin-film deposition, electron beam lithography, and ion milling is presented for the fabrication of gold and silver nanostructures to create size- and shape-tunable structures that present a toolbox for nano-optical investigations.
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Enhancement of Radiative Plasmon Decay by Hot Electron Tunneling.
TL;DR: It is demonstrated that photon emission induced by inelastic tunneling through a nanometer single gap between a sharp Au tip and an Au substrate can be significantly enhanced by the illumination of the junction with 634 nm laser light with an electric field component oriented parallel to the tip-axis.
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Light-Controlled Near-Field Energy Transfer in Plasmonic Metasurface Coupled MoS2 Monolayer
Miaoyi Deng,Ziwei Li,Xin Rong,Yang Luo,Bowen Li,Liheng Zheng,Xiao Wang,Feng Lin,Alfred J. Meixner,Kai Braun,Xing Zhu,Zheyu Fang +11 more
TL;DR: A theoretical model of two coupled oscillators is proposed, where the expanded general solutions of such a model result in a series of eigenvalues that correspond to the renormalization of energy levels in modulated MoS2, and provides an alternative method to describe energy transfer between metallic structures and 2D semiconductors.
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