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arXiv · 1601.05623

A strongly-coupled $Λ$-type micromechanical system

Hajime Okamoto·Ryan Schilling·Hendrik Schütz·Vivishek Sudhir·Dalziel J. Wilson·Hiroshi Yamaguchi·Tobias J. Kippenberg
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Abstract

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.

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Hajime Okamoto, Ryan Schilling, Hendrik Schütz, Vivishek Sudhir, Dalziel J. Wilson, Hiroshi Yamaguchi, Tobias J. Kippenberg. 2016-01-21. A strongly-coupled $Λ$-type micromechanical system. https://doi.org/10.1063/1.4945741

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