Elastomer thin-film pressure sensor based on embedded photonic tunnel-junction arrays

We propose an elastomer thin-film pressure sensor enabled by pressure-sensitive optical signals through vertical photonic tunnel-junction couplers. We provide the operation principle, design, fabrication, and test results from a 50 μm thick polydimethylsiloxane sheet accommodating embedded vertical...

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Veröffentlicht in:Optics letters 2018-08, Vol.43 (16), p.3953-3956
Hauptverfasser: Yoon, Jae Woong, Kim, Jin Tae, Park, Bong Je, Yun, Sungryul, Mun, Seongcheol, Park, Seung Koo, Park, Suntak
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container_end_page 3956
container_issue 16
container_start_page 3953
container_title Optics letters
container_volume 43
creator Yoon, Jae Woong
Kim, Jin Tae
Park, Bong Je
Yun, Sungryul
Mun, Seongcheol
Park, Seung Koo
Park, Suntak
description We propose an elastomer thin-film pressure sensor enabled by pressure-sensitive optical signals through vertical photonic tunnel-junction couplers. We provide the operation principle, design, fabrication, and test results from a 50 μm thick polydimethylsiloxane sheet accommodating embedded vertical photonic tunnel-junction couplers. The result with a 5 mm long device shows a differential optical power change that is ∼140% of the incident power under moderate external pressure of ∼40  kPa, thereby clearly demonstrating a robust pressure-sensing capability realized in a highly flexible, lightweight, transferrable, optically transparent, and bio-compatible thin-film material. Therefore, the proposed approach potentially enables versatile pressure and touch sensors for many applications in practice.
doi_str_mv 10.1364/OL.43.003953
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source Optica Publishing Group Journals
subjects Biocompatibility
Couplers
Elastomers
External pressure
Optical communication
Photonics
Polydimethylsiloxane
Pressure sensors
Product design
Sensor arrays
Thin films
title Elastomer thin-film pressure sensor based on embedded photonic tunnel-junction arrays
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