High sensitivity Fabry–Pérot interferometric magnetic sensor based on Fe 3 O 4 -doped PDMS composite thin film

High sensitivity Fabry–Pérot interferometric magnetic sensor based on Fe 3 O 4 -doped PDMS composite thin film

Abstract A magnetic field sensor based on Fabry–Pérot interferometer (FPI) with soft gold magnetic composite film (GMCF) is proposed and demonstrated experimentally. GMCF is fabricated by Fe 3 O 4 -doped polydimethylsiloxane (PDMS) film and adhered thin gold membrane via van der Waals force. Applyin...

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Bibliographic Details
Published in:Applied physics express 2023-02, Vol.16 (2), p.26501
Main Authors: Wang, Xingfeng, Yang, Jianfeng
Format: Article
Language:eng
Online Access:Get full text
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Summary:Abstract A magnetic field sensor based on Fabry–Pérot interferometer (FPI) with soft gold magnetic composite film (GMCF) is proposed and demonstrated experimentally. GMCF is fabricated by Fe 3 O 4 -doped polydimethylsiloxane (PDMS) film and adhered thin gold membrane via van der Waals force. Applying an external magnetic field, GMCF can vibrate under magnetic forces and cause a change in the cavity length of FPI and hence modulates the interference spectra. Experimental results indicate that the sensor can achieve maximum sensitivity of 390 pm mT −1 under a linear magnetic field intensity ranging from 0 to 65 mT. The proposed sensor could help with magnetic field detection in complex environments.
ISSN:1882-0778
1882-0786