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Ultra-sensitive measurement of transverse displacements with linear photonic gears

Author

Listed:
  • Raouf Barboza

    (Università degli studi di Napoli Federico II, Complesso Universitario di Monte S. Angelo)

  • Amin Babazadeh

    (Università degli studi di Napoli Federico II, Complesso Universitario di Monte S. Angelo)

  • Lorenzo Marrucci

    (Università degli studi di Napoli Federico II, Complesso Universitario di Monte S. Angelo)

  • Filippo Cardano

    (Università degli studi di Napoli Federico II, Complesso Universitario di Monte S. Angelo)

  • Corrado Lisio

    (Università degli studi di Napoli Federico II, Complesso Universitario di Monte S. Angelo
    CNR-SPIN U.O.S. di Napoli)

  • Vincenzo D’Ambrosio

    (Università degli studi di Napoli Federico II, Complesso Universitario di Monte S. Angelo)

Abstract

Accurately measuring mechanical displacements is essential for a vast portion of current technologies. Several optical techniques accomplish this task, allowing for non-contact sensing even below the diffraction limit. Here we introduce an optical encoding technique, dubbed “linear photonic gears”, that enables ultra-sensitive measurements of a transverse displacement by mapping it into the polarization rotation of a laser beam. In ordinary ambient conditions, we measure the relative shift between two objects with a resolution of 400 pm. We argue that a resolution of 50 pm should be achievable with existing state-of-the-art technologies. Our single-optical-path scheme is intrinsically stable and it could be implemented as a compact sensor, using cost effective integrated optics. We anticipate it may have a strong impact on both research and industry.

Suggested Citation

  • Raouf Barboza & Amin Babazadeh & Lorenzo Marrucci & Filippo Cardano & Corrado Lisio & Vincenzo D’Ambrosio, 2022. "Ultra-sensitive measurement of transverse displacements with linear photonic gears," Nature Communications, Nature, vol. 13(1), pages 1-5, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-28700-2
    DOI: 10.1038/s41467-022-28700-2
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    References listed on IDEAS

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    1. Robert G. Knobel & Andrew N. Cleland, 2003. "Nanometre-scale displacement sensing using a single electron transistor," Nature, Nature, vol. 424(6946), pages 291-293, July.
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