Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 56: Plasmonics & Nanooptics IV: Materials Science and Chemistry Applications (joint session O/CPP)
O 56.3: Vortrag
Mittwoch, 3. April 2019, 15:30–15:45, H8
Switchable absorber/emitter based on vanadium dioxide — •Xinrui Lyu1,2,3, Taubner Thomas1, and Yunzhen Cao2 — 1Institute of Physics (IA), RWTH Aachen University, 52056 Aachen, Germany — 2Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, PR China — 3University of Chinese Academy of Sciences, Beijing 100049, PR China
We numerically demonstrate a switchable metamaterial absorber/emitter based on vanadium dioxide (VO2). The absorber consists of three layers, top patterned VO2 layer, dielectric spacer layer and bottom reflective layer. Perfect absorption can be thermally turned on when the excitation of magnetic resonance is supported with the metallic VO2, while switched off with semiconducting VO2. The absorption peak can be tuned with different shapes and geometries of patterned VO2 layer. The absorption bandwidth can be largely broadened when using lossy metallic VO2 instead of noble metal as reflective layer. The results would facilitate the design of switchable metamaterials for active control in energy and sensing applications.