Quantum enhanced optomechanical magnetometry

Bei-Bei Li, Jan Bilek, Ulrich Busk Hoff, Lars S. Madsen, Stefan Forstner, Varun Prakash, Clemens Schäfermeier, Tobias Gehring, Warwick P. Bowen*, Ulrik Lund Andersen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The resonant enhancement of both mechanical and optical response in microcavity optomechanical devices allows exquisitely sensitive measurements of stimuli, such as acceleration, mass, and magnetic fields. In this work, we show that quantum correlated light can improve the performance of such sensors, increasing both their sensitivity and their bandwidth. Specifically, we develop a silicon-chip-based cavity optomechanical magnetometer that incorporates phase squeezed light to suppress optical shot noise. At frequencies where shot noise is the dominant noise source, this allows a 20% improvement in magnetic field sensitivity. Furthermore, squeezed light broadens the range of frequencies at which thermal noise dominates, which has the effect of increasing the overall sensor bandwidth by 50%. These proof-of-principle results open the door to apply quantum correlated light more broadly in chip-scale sensors and devices.
Original languageEnglish
Article number850
JournalOptica
Volume5
Issue number7
Number of pages7
ISSN2334-2536
DOIs
Publication statusPublished - 2018

Cite this

Li, B-B., Bilek, J., Hoff, U. B., Madsen, L. S., Forstner, S., Prakash, V., ... Andersen, U. L. (2018). Quantum enhanced optomechanical magnetometry. Optica, 5(7), [850]. https://doi.org/10.1364/OPTICA.5.000850
Li, Bei-Bei ; Bilek, Jan ; Hoff, Ulrich Busk ; Madsen, Lars S. ; Forstner, Stefan ; Prakash, Varun ; Schäfermeier, Clemens ; Gehring, Tobias ; Bowen, Warwick P. ; Andersen, Ulrik Lund. / Quantum enhanced optomechanical magnetometry. In: Optica. 2018 ; Vol. 5, No. 7.
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abstract = "The resonant enhancement of both mechanical and optical response in microcavity optomechanical devices allows exquisitely sensitive measurements of stimuli, such as acceleration, mass, and magnetic fields. In this work, we show that quantum correlated light can improve the performance of such sensors, increasing both their sensitivity and their bandwidth. Specifically, we develop a silicon-chip-based cavity optomechanical magnetometer that incorporates phase squeezed light to suppress optical shot noise. At frequencies where shot noise is the dominant noise source, this allows a 20{\%} improvement in magnetic field sensitivity. Furthermore, squeezed light broadens the range of frequencies at which thermal noise dominates, which has the effect of increasing the overall sensor bandwidth by 50{\%}. These proof-of-principle results open the door to apply quantum correlated light more broadly in chip-scale sensors and devices.",
author = "Bei-Bei Li and Jan Bilek and Hoff, {Ulrich Busk} and Madsen, {Lars S.} and Stefan Forstner and Varun Prakash and Clemens Sch{\"a}fermeier and Tobias Gehring and Bowen, {Warwick P.} and Andersen, {Ulrik Lund}",
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Li, B-B, Bilek, J, Hoff, UB, Madsen, LS, Forstner, S, Prakash, V, Schäfermeier, C, Gehring, T, Bowen, WP & Andersen, UL 2018, 'Quantum enhanced optomechanical magnetometry', Optica, vol. 5, no. 7, 850. https://doi.org/10.1364/OPTICA.5.000850

Quantum enhanced optomechanical magnetometry. / Li, Bei-Bei; Bilek, Jan; Hoff, Ulrich Busk; Madsen, Lars S.; Forstner, Stefan; Prakash, Varun; Schäfermeier, Clemens; Gehring, Tobias; Bowen, Warwick P.; Andersen, Ulrik Lund.

In: Optica, Vol. 5, No. 7, 850, 2018.

Research output: Contribution to journalJournal articleResearchpeer-review

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T1 - Quantum enhanced optomechanical magnetometry

AU - Li, Bei-Bei

AU - Bilek, Jan

AU - Hoff, Ulrich Busk

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AU - Forstner, Stefan

AU - Prakash, Varun

AU - Schäfermeier, Clemens

AU - Gehring, Tobias

AU - Bowen, Warwick P.

AU - Andersen, Ulrik Lund

PY - 2018

Y1 - 2018

N2 - The resonant enhancement of both mechanical and optical response in microcavity optomechanical devices allows exquisitely sensitive measurements of stimuli, such as acceleration, mass, and magnetic fields. In this work, we show that quantum correlated light can improve the performance of such sensors, increasing both their sensitivity and their bandwidth. Specifically, we develop a silicon-chip-based cavity optomechanical magnetometer that incorporates phase squeezed light to suppress optical shot noise. At frequencies where shot noise is the dominant noise source, this allows a 20% improvement in magnetic field sensitivity. Furthermore, squeezed light broadens the range of frequencies at which thermal noise dominates, which has the effect of increasing the overall sensor bandwidth by 50%. These proof-of-principle results open the door to apply quantum correlated light more broadly in chip-scale sensors and devices.

AB - The resonant enhancement of both mechanical and optical response in microcavity optomechanical devices allows exquisitely sensitive measurements of stimuli, such as acceleration, mass, and magnetic fields. In this work, we show that quantum correlated light can improve the performance of such sensors, increasing both their sensitivity and their bandwidth. Specifically, we develop a silicon-chip-based cavity optomechanical magnetometer that incorporates phase squeezed light to suppress optical shot noise. At frequencies where shot noise is the dominant noise source, this allows a 20% improvement in magnetic field sensitivity. Furthermore, squeezed light broadens the range of frequencies at which thermal noise dominates, which has the effect of increasing the overall sensor bandwidth by 50%. These proof-of-principle results open the door to apply quantum correlated light more broadly in chip-scale sensors and devices.

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Li B-B, Bilek J, Hoff UB, Madsen LS, Forstner S, Prakash V et al. Quantum enhanced optomechanical magnetometry. Optica. 2018;5(7). 850. https://doi.org/10.1364/OPTICA.5.000850