Focusing membrane metamirrors for integrated cavity optomechanics

A. R. Agrawal, J. Manley, D. Allepuz-Requena, D. J. Wilson

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Membrane-based cavity optomechanical systems have been widely successful; however, their chip-scale integration remains a significant challenge. Here we present a solution based on metasurface design. Specifically, by non-periodic photonic crystal patterning of a Si3N4 membrane, we realize a suspended metamirror with a finite focal length, enabling formation of a stable optical cavity with a plane end-mirror. We present simulation, fabrication, and characterization of the metamirror using both free-space and cavity-based measurements, demonstrating reflectivities as high as 99% and cavity finesse as high as 600. The mirror radius of curvature (∼30 cm) is inferred from the cavity mode spectrum. In combination with phononic engineering, focusing membrane mirrors offer a route towards high-cooperativity, vertically integrated cavity optomechanical systems with applications ranging from precision force sensing to hybrid quantum transduction.

Original languageEnglish (US)
Pages (from-to)1235-1241
Number of pages7
JournalOptica
Volume11
Issue number9
DOIs
StatePublished - Sep 20 2024

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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