Nanofiber based displacement sensor
Optics
2020-06-15 v4
Abstract
We report on the realization of a displacement sensor based on an optical nanofiber. A single gold nano-sphere is deposited on top of a nanofiber and the system is placed within a standing wave which serves as a position ruler. Scattered light collected within the guided mode of the fiber gives a direct measure of the nanofiber displacement. We calibrated our device and found a sensitivity up to 1.2~nm/. A mechanical model based on the Mie scattering theory is then used to evaluate the optically induced force on the nanofiber by an external laser. With our sensing system, we demonstrate that an external force of 1~pN applied at the nanofiber waist can be detected.
Keywords
Cite
@article{arxiv.2001.11253,
title = {Nanofiber based displacement sensor},
author = {Chengjie Ding and Maxime Joos and Constanze Bach and Tom Bienaime and Elisabeth Giacobino and E Wu and Alberto Bramati and Quentin Glorieux},
journal= {arXiv preprint arXiv:2001.11253},
year = {2020}
}