| Download | - View accepted manuscript: Isolation of optomechanical nonlinearities in nanomechanical cantilevers (PDF, 2.7 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1103/PhysRevA.105.053517 |
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| Author | Search for: Westwood-Bachman, Jocelyn N.1ORCID identifier: https://orcid.org/0000-0002-9773-3336; Search for: Firdous, Tayyaba1ORCID identifier: https://orcid.org/0000-0002-1064-1907; Search for: Kobryn, Alexander E.1; Search for: Belov, Miro1ORCID identifier: https://orcid.org/0000-0002-6097-7126; Search for: Hiebert, Wayne K.1ORCID identifier: https://orcid.org/0000-0002-2064-7907 |
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| Affiliation | - National Research Council of Canada. Nanotechnology
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| Funder | Search for: Natural Sciences and Engineering Research Council of Canada |
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| Format | Text, Article |
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| Physical description | 20 p. |
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| Abstract | In this paper we study the nonlinearities present in a nano-optomechanical system consisting of a cantilever coupled to a racetrack resonator. We show that higher-order harmonics in the mechanical frequency spectrum are indicative of a readout nonlinearity and we connect these harmonics to the optical cavity transmission with detuning function and its derivatives. We also show that there are optical force nonlinearities that cause a Duffing-type response in the driven mechanical signal. The Duffing-type nonlinearity produces a nonlinear softening when the probe laser is blue detuned, and a nonlinear stiffening when the probe laser is red detuned. The optical force and readout nonlinearities are difficult to separate using a purely experimental approach. We demonstrate the use of a numerical model of the pump-and-probe system to analyze the nonlinearities independently. The numerical model also allows us to estimate the amplitude of the system, predicting the exact detuning where nonlinearities cancel each other to produce higher critical amplitude, and ultimately gives a prospective mass sensitivity level of 83 yg / Hz¹/². The numerical model provides a rich understanding of the complexities of the nano-optomechanical system and is much needed for the development of sensors with increased dynamic range and overall performance. |
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| Publication date | 2022-05-18 |
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| Publisher | American Physical Society |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | NRC-NANO-197 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 206fdd89-395f-47df-a484-42d47f81e4c8 |
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| Record created | 2022-07-04 |
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| Record modified | 2022-07-04 |
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