title: Near-self-imaging cavity for three-mode optoacoustic parametric amplifiers using silicon microresonators.
abstract: Three-mode optoacoustic parametric amplifiers (OAPAs), in which a pair of photon modes are strongly coupled to an acoustic mode, provide a general platform for investigating self-cooling, parametric instability and very sensitive transducers. Their realization requires an optical cavity with tunable transverse modes and a high quality-factor mirror resonator. This paper presents the design of a table-top OAPA based on a near-self-imaging cavity design, using a silicon torsional microresonator. The design achieves a tuning coefficient for the optical mode spacing of 2.46  MHz/mm. This allows tuning of the mode spacing between amplification and self-cooling regimes of the OAPA device. Based on demonstrated resonator parameters (frequencies ∼400  kHz and quality-factors ∼7.5×10(5) we predict that the OAPA can achieve parametric instability with 1.6 μW of input power and mode cooling by a factor of 1.9×10(4) with 30 mW of input power.
authors.forename: Jian
authors.initials: J
authors.lastname: Liu
authors.forename: F A
authors.initials: FA
authors.lastname: Torres
authors.forename: Yubo
authors.initials: Y
authors.lastname: Ma
authors.forename: C
authors.initials: C
authors.lastname: Zhao
authors.forename: L
authors.initials: L
authors.lastname: Ju
authors.forename: D G
authors.initials: DG
authors.lastname: Blair
authors.forename: S
authors.initials: S
authors.lastname: Chao
authors.forename: I
authors.initials: I
authors.lastname: Roch-Jeune
authors.forename: R
authors.initials: R
authors.lastname: Flaminio
authors.forename: C
authors.initials: C
authors.lastname: Michel
authors.forename: K-Y
authors.initials: KY
authors.lastname: Liu