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Transduction of large optomechanical amplitudes with racetrack-loaded Mach-Zehnder interferometers

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DOIResolve DOI: https://doi.org/10.1364/OE.396971
AuthorSearch for: 1ORCID identifier: https://orcid.org/0000-0002-9773-3336; Search for: 1ORCID identifier: https://orcid.org/0000-0002-3579-8791; Search for: ; Search for: 1ORCID identifier: https://orcid.org/0000-0002-2064-7907
Affiliation
  1. National Research Council of Canada. Nanotechnology
FunderSearch for: Natural Sciences and Engineering Research Council of Canada; Search for: Vanier Canada Graduate Scholarship Program; Search for: Alberta Innovates
FormatText, Article
SubjectFano resonance; homodyne detection; optical measurement; phase measurement; power spectral density; tunable diode lasers
Abstract
Chip-integrated photonic devices have stimulated development in areas ranging from telecommunications to optomechanics. Racetrack resonators have gained popularity for optomechanical transduction due to their high sensitivity and cavity finesse. However, they lack sufficient dynamic range to read out large amplitude mechanical resonators, which are preferred for sensing applications. We present a robust photonic circuit based on a Mach-Zehnder interferometer (MZI) combined with a racetrack resonator that increases linear range without compromising high transduction sensitivity. Optical and mechanical properties of combined MZI-racetrack devices are compared to lone racetracks with the same physical dimensions in the undercoupled, overcoupled and critical coupled regimes. We demonstrate an overall improvement in dynamic range, transduction responsivity, and mass sensitivity of up to 4x, 3x and 2.8x, respectively. Our highly phase sensitive MZI circuit also enables applications such as on-chip optical homodyning.
Publication date
PublisherOptica Publishing Group
In
  • Optics Express 28, no. 15, 21835 (8 July 2020): 1–10.
LanguageEnglish
Peer reviewedYes
NRC numberNRC-NANO-073
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Record identifier51ba3249-3e55-41ae-95fe-4b9f5bc7615e
Record created2022-04-04
Record modified2022-04-04
Date modified: