Confinement of gigahertz sound and light in Tamm plasmon resonators

V. VILLAFAÑE; A. E. BRUCHHAUSEN; B. JUSSERAND; P. SENELLART; A. LEMAITRE; A. FAINSTEIN

PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS

APS

Año: 2015 vol. 92 p. 165308 - 165308

0163-1829

We demonstrate theoretically and by pump-probe picosecond acoustics experiments the simultaneousconfinement of light and gigahertz sound in Tamm plasmon resonators, formed by depositing a thin layer of Auonto a GaAs/AlGaAs Bragg reflector. The cavity has InGaAs quantum dots (QDs) embedded at the maximum ofthe confined optical field in the first GaAs layer. The different sound generation and detection mechanisms aretheoretically analyzed. It is shown that the Au layer absorption and the resonant excitation of the QDs are themore efficient light-sound transducers for the coupling of near-infrared light with the confined acoustic modes,while the displacement of the interfaces is the main back-action mechanism at these energies. The prospects forthe compact realization of optomechanical resonators based on Tamm plasmon cavities are discussed.