Coupling light into graphene plasmons through surface acoustic waves.
We propose a scheme for coupling laser light into graphene plasmons with the help of electrically generated surface acoustic waves. The surface acoustic wave forms a diffraction grating which allows us to excite the long lived phononlike branch of the hybridized graphene plasmon-phonon dispersion with infrared laser light. Our approach avoids patterning the graphene sheet, does not rely on complicated optical near-field techniques, and allows us to electrically switch the coupling between far-field radiation and propagating graphene plasmons.
Departamento de Física de Materiales, Universidad Complutense de Madrid, E-28040 Madrid, Spain.
Jürgen
J
Schiefele
Instituto de Sistemas Optoelectrónicos y Microtecnología, Universidad Politécnica de Madrid, E-28040 Madrid, Spain and Campus de Excelencia Internacional, Campus Moncloa UCM-UPM, E-28040 Madrid, Spain.
Jorge
J
Pedrós
Departamento de Física de Materiales, Universidad Complutense de Madrid, E-28040 Madrid, Spain and Campus de Excelencia Internacional, Campus Moncloa UCM-UPM, E-28040 Madrid, Spain.
Fernando
F
Sols
Instituto de Sistemas Optoelectrónicos y Microtecnología, Universidad Politécnica de Madrid, E-28040 Madrid, Spain and Campus de Excelencia Internacional, Campus Moncloa UCM-UPM, E-28040 Madrid, Spain.
Fernando
F
Calle
Instituto de Ciencia de Materiales de Madrid, CSIC, E-28049 Madrid, Spain.
Francisco
F
Guinea