Tittl, AndreasAndreasTittlMichel, Ann Katrin U.Ann Katrin U.MichelSchäferling, MartinMartinSchäferlingYin, XinghuiXinghuiYinGholipour, BehradBehradGholipourCui, LongLongCuiWuttig, MatthiasMatthiasWuttigTaubner, ThomasThomasTaubnerNeubrech, FrankFrankNeubrechGiessen, HaraldHaraldGiessen2026-03-252026-03-252015-07-14Advanced Materials 27 (31): 4597-4603 (2015)https://hdl.handle.net/11420/62400A switchable perfect absorber with multispectral thermal imaging capability is presented. Aluminum nanoantenna arrays above a germanium antimony telluride (GST) spacer layer and aluminum mirror provide efficient wavelength-tunable absorption in the mid-infrared. Utilizing the amorphous-to-crystalline phase transition in GST, this device offers switchable absorption with strong reflectance contrast at resonance and large phase-change-induced spectral shifts.en1521-409520153145974603Wiley-VCHactive plasmonicsGSTmultispectral imagingperfect absorbersthermal imagingTechnology::600: TechnologyJournal Article10.1002/adma.201502023Journal Article