J
John B Ketterson
Researcher at Northwestern University
Publications - 823
Citations - 18004
John B Ketterson is an academic researcher from Northwestern University. The author has contributed to research in topics: Thin film & Superconductivity. The author has an hindex of 60, co-authored 814 publications receiving 16929 citations. Previous affiliations of John B Ketterson include University of Virginia & University of California, Los Angeles.
Papers
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Hybrid Germanium Iodide Perovskite Semiconductors: Active Lone Pairs, Structural Distortions, Direct and Indirect Energy Gaps, and Strong Nonlinear Optical Properties
Constantinos C. Stoumpos,Laszlo Frazer,Daniel J. Clark,Yong Soo Kim,Yong Soo Kim,Sonny H. Rhim,Sonny H. Rhim,Arthur J Freeman,John B Ketterson,Joon I. Jang,Mercouri G. Kanatzidis +10 more
TL;DR: The second harmonic generation (SHG) properties of the hybrid organic/inorganic germanium perovskite compounds display remarkably strong, type I phase-matchable SHG response with high laser-induced damage thresholds (up to ∼3 GW/cm(2).
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Photoluminescence and ultraviolet lasing of polycrystalline ZnO thin films prepared by the oxidation of the metallic Zn
TL;DR: In this paper, a simple method for preparing polycrystalline ZnO thin films with good luminescent properties was reported: the oxidization of metallic Zn films. But this method is not suitable for the case of light-sensitive materials.
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Room-temperature ferromagnetism in Cu-doped ZnO thin films
TL;DR: In this paper, a series of copper-doped zinc oxide films were grown by pulsed-laser ablation and the magnetic moment per copper atom decreased as the copper concentration increased.
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Ferromagnetism in Mn-doped Ge
Sunglae Cho,Sungyoul Choi,Soon Cheol Hong,Yunki Kim,John B Ketterson,Bong-Jun Kim,Yul-Seong Kim,Jung Hyun Jung +7 more
TL;DR: In this paper, the lattice constant increases linearly with Mn concentration due to the larger Mn atomic radius compared with Ge, strongly indicating that Mn ions are being incorporated into the host Ge lattice.