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Selective nonresonant excitation of vibrational modes in suspended graphene via vibron-plasmon interaction

Axel Martin Eriksson (Institutionen för teknisk fysik, Kondenserade materiens teori) ; Leonid Y. Gorelik (Institutionen för teknisk fysik, Kondenserade materiens teori)
2d Materials (2053-1583). Vol. 2 (2015), 4, p. Art. no. 045008.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: continuum electromechanics, nanoelectromechanical oscillator, geometric resonance, cavity optomechanics, resonators, Materials Science

Denna post skapades 2016-02-24. Senast ändrad 2016-08-18.
CPL Pubid: 232403


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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)


Fusion, plasma och rymdfysik

Chalmers infrastruktur

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