title: NEMS With Broken T Symmetry: Graphene Based Unidirectional Acoustic Transmission Lines.
abstract: In this work we discuss the idea of one-way acoustic signal isolation in low dimensional nanoelectromechanical oscillators. We report a theoretical study showing that one-way conversion between in-phase and anti-phase vibrational modes of a double layer graphene nanoribbon is achieved by introducing spatio-temporal modulation of system properties. The required modulation length in order to reach full conversion between the two modes is subsequently calculated. Generalization of the method beyond graphene nanoribbons and realization of a NEMS signal isolator are also discussed.
authors.affiliation: Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia, PA 19104, USA.
authors.forename: Mehdi B
authors.initials: MB
authors.lastname: Zanjani
authors.affiliation: Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.
authors.forename: Arthur R
authors.initials: AR
authors.lastname: Davoyan
authors.affiliation: Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.
authors.forename: Nader
authors.initials: N
authors.lastname: Engheta
authors.affiliation: Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia, PA 19104, USA.
authors.forename: Jennifer R
authors.initials: JR
authors.lastname: Lukes