Selective nonresonant excitation of vibrational modes in suspended graphene via vibron-plasmon interaction
Artikel i vetenskaplig tidskrift, 2015

We theoretically study a doped graphene ribbon suspended over a trench and subject to an ac-electrical field polarized perpendicularly to the graphene plane. In such a system, the external ac-field is coupled to the relatively slow mechanical vibrations via plasmonic oscillations in the isolated graphene sheet. We show that the electrical field generates an effective pumping of the mechanical modes. It is demonstrated that in the case of underdamped plasma oscillation, a peculiar kind of geometrical resonance of the mechanical and plasma oscillations appear. The efficiency of pumping significantly increases when the wavenumber of the mechanical mode is in close agreement with the wavenumber of the plasma waves. The intensity of the pumping increases with the wavenumber of the mode. This phenomenon allows selective actuation of different mechanical modes, although the driving field is homogeneous.

Materials Science

geometric resonance

cavity optomechanics

resonators

continuum electromechanics

nanoelectromechanical oscillator

Författare

Martin Eriksson

Chalmers, Teknisk fysik, Kondenserade materiens teori

Leonid Gorelik

Chalmers, Teknisk fysik, Kondenserade materiens teori

2D Materials

2053-1583 (eISSN)

Vol. 2 4 Art. no. 045008-

Ämneskategorier

Fusion, plasma och rymdfysik

DOI

10.1088/2053-1583/2/4/045008