Ultra-sensitive measurement of transverse displacements with linear photonic gears

@article{Barboza2022UltrasensitiveMO,
  title={Ultra-sensitive measurement of transverse displacements with linear photonic gears},
  author={Raouf Barboza and Amin Babazadeh and Lorenzo Marrucci and Filippo Cardano and Corrado de Lisio and Vincenzo D'ambrosio},
  journal={Nature Communications},
  year={2022},
  volume={13}
}
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… 

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