title: Plasmonic piezoelectric nanomechanical resonator for spectrally selective infrared sensing.
abstract: Ultrathin plasmonic metasurfaces have proven their ability to control and manipulate light at unprecedented levels, leading to exciting optical functionalities and applications. Although to date metasurfaces have mainly been investigated from an electromagnetic perspective, their ultrathin nature may also provide novel and useful mechanical properties. Here we propose a thin piezoelectric plasmonic metasurface forming the resonant body of a nanomechanical resonator with simultaneously tailored optical and electromechanical properties. We experimentally demonstrate that it is possible to achieve high thermomechanical coupling between electromagnetic and mechanical resonances in a single ultrathin piezoelectric nanoplate. The combination of nanoplasmonic and piezoelectric resonances allows the proposed device to selectively detect long-wavelength infrared radiation with unprecedented electromechanical performance and thermal capabilities. These attributes lead to the demonstration of a fast, high-resolution, uncooled infrared detector with ∼80% absorption for an optimized spectral bandwidth centered around 8.8 μm.
authors.affiliation: Department of Electrical &Computer Engineering at Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, USA.
authors.forename: Yu
authors.initials: Y
authors.lastname: Hui
authors.affiliation: Department of Electrical &Computer Engineering at The University of Texas at Austin, 1616 Guadalupe St., UTA 7.215, Austin, Texas 78701, USA.
authors.forename: Juan Sebastian
authors.initials: JS
authors.lastname: Gomez-Diaz
authors.affiliation: Department of Electrical &Computer Engineering at Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, USA.
authors.forename: Zhenyun
authors.initials: Z
authors.lastname: Qian
authors.affiliation: Department of Electrical &Computer Engineering at The University of Texas at Austin, 1616 Guadalupe St., UTA 7.215, Austin, Texas 78701, USA.
authors.forename: Andrea
authors.initials: A
authors.lastname: Alù
authors.affiliation: Department of Electrical &Computer Engineering at Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, USA.
authors.forename: Matteo
authors.initials: M
authors.lastname: Rinaldi