High sensitive space electric field sensing based on micro fiber interferometer with field force driven gold nanofilm.

Abstract:

:The traditional electrical field sensing can be realized by utilizing electro-optic materials or liquid crystals, and has limitations of easy breakdown, free assembly and difficult measurement of low-frequency. Here, we propose a new method to realize safe measurement of spatial dynamic electric field by using a micro fiber interferometer integrated with gold nanofilm. The energy of the electric charge received through antenna forms the intrinsic electric field with two micro electrodes, one of which is the 120 nm gold film vibration beam micromachined by femtosecond lasers and integrated with the micro fiber. The change of the intrinsic electric field force due to the spatial electric field will cause the vibration of the film beam. By demodulating the output signal of the micro fiber interferometer, the electric field can be measured. We demonstrate the detectable frequency ranges from tens of Hz to tens of KHz, and the minimum electric field intensity is ~200 V/m at 1 KHz. Our electric field measurement technology combining optical fiber interference with gold nanostructures shows the advantages of security, high sensitivity, compact size, and multiplexed multi-point and remote detection.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Zhu T,Zhou L,Liu M,Zhang J,Shi L

doi

10.1038/srep15802

subject

Has Abstract

pub_date

2015-10-28 00:00:00

pages

15802

issn

2045-2322

pii

srep15802

journal_volume

5

pub_type

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