2016/01/21 by Hajime Okamoto, Ryan Schilling, Hendrik Schütz +4 · 1 citation
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1063/1.4945741
published as Appl. Phys. Lett. 108, 153105 (2016) · 5 pages, 5 figures
arxiv created 2016/01/21 · arxiv updated 2018/06/22
We study a classical Λ-type three-level system based on three high-Q micromechanical beam resonators embedded in a gradient electric field. By modulating the strength of the field at the difference frequency between adjacent beam modes, we realize strong dynamic two-mode coupling, via the dielectric force. Driving adjacent pairs simultaneously, we observe the formation of a purely mechanical 'dark' state and an all-phononic analog of coherent population trapping --- signatures of strong three-mode coupling. The Λ-type micromechanical system is a natural extention of previously demonstrated 'two-level' micromechanical systems and offers new perspectives on the architecture of all-phononic micromechanical circuits and arrays.