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Elastomer Thin-film Pressure Sensor based on Embedded Photonic Tunnel-junction Arrays
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- Authors
- Jae Woong Yoon, Jin Tae Kim, Bong Je Park, Sungryul Yun, Seongcheol Mun, Seung Koo Park, Suntak Park
- Issue Date
- 2018-08
- Citation
- Optics Letters, v.43, no.16, pp.3953-3956
- ISSN
- 0146-9592
- Publisher
- Optical Society of America(OSA)
- Language
- English
- Type
- Journal Article
- Abstract
- 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.
- KSP Keywords
- External pressure, Highly flexible, Operation principle, Polydimethylsiloxane sheet, Power change, Pressure Sensor, Sensor based, Thin film materials, optical power, optically transparent, pressure sensitive