title: A Switchable Mid-Infrared Plasmonic Perfect Absorber with Multispectral Thermal Imaging Capability.
abstract: A 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.
authors.affiliation: 4th Physics Institute and Research Center Scope, University of Stuttgart, D-70569, Stuttgart, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Tittl
authors.affiliation: I. Institute of Physics (IA), RWTH Aachen University, D-52056, Aachen, Germany.
authors.forename: Ann-Katrin U
authors.initials: AK
authors.lastname: Michel
authors.affiliation: 4th Physics Institute and Research Center Scope, University of Stuttgart, D-70569, Stuttgart, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Schäferling
authors.affiliation: 4th Physics Institute and Research Center Scope, University of Stuttgart, D-70569, Stuttgart, Germany.
authors.forename: Xinghui
authors.initials: X
authors.lastname: Yin
authors.affiliation: Centre for Disruptive Photonic Technologies, Nanyang Technological University, 637371, Singapore, Singapore.
authors.forename: Behrad
authors.initials: B
authors.lastname: Gholipour
authors.affiliation: Centre for Disruptive Photonic Technologies, Nanyang Technological University, 637371, Singapore, Singapore.
authors.forename: Long
authors.initials: L
authors.lastname: Cui
authors.affiliation: I. Institute of Physics (IA), RWTH Aachen University, D-52056, Aachen, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Wuttig
authors.affiliation: I. Institute of Physics (IA), RWTH Aachen University, D-52056, Aachen, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Taubner
authors.affiliation: 4th Physics Institute and Research Center Scope, University of Stuttgart, D-70569, Stuttgart, Germany.
authors.forename: Frank
authors.initials: F
authors.lastname: Neubrech
authors.affiliation: 4th Physics Institute and Research Center Scope, University of Stuttgart, D-70569, Stuttgart, Germany.|Centre for Disruptive Photonic Technologies, Nanyang Technological University, 637371, Singapore, Singapore.
authors.forename: Harald
authors.initials: H
authors.lastname: Giessen
keywords: GST; active plasmonics; multispectral imaging; perfect absorbers; thermal imaging