Ultrasonic Gas Sensing by Two-Dimensional Surface Phononic Crystal Ring Resonators

Ahmet Cicek; Digdem Trak; Yasin Arslan; Nurettin Korozlu; Olgun A. Kaya; Bulent Ulug

doi:10.1021/acssensors.9b00865

Ultrasonic Gas Sensing by Two-Dimensional Surface Phononic Crystal Ring Resonators

Ahmet Cicek, Digdem Trak, Yasin Arslan, Nurettin Korozlu, Olgun A. Kaya, Bulent Ulug

Research output: Contribution to journal › Article › peer-review

30 Citations (Scopus)

Abstract

An acoustic ring resonator employing a two-dimensional surface phononic crystal is proposed for high-sensitivity detection in binary gas mixtures. Band analyses and frequency-domain simulations via the finite-element method reveal that a single band for spoof surface acoustic waves appears at ultrasonic frequencies around 58 kHz where modification of its dispersion due to varying gas composition results in a linear shift of the resonance frequency. The shift rate is -17.3 and 8.8 mHz/ppm for CO₂ and CH₄, respectively. The linear shift of resonance frequency is experimentally validated. In addition, the ring resonator can also be employed to track acoustic intensity variation with gas concentration, where exponentially decaying intensity for low concentrations leverages high-sensitivity operation.

Original language	English
Pages (from-to)	1761-1765
Number of pages	5
Journal	ACS Sensors
Volume	4
Issue number	7
DOIs	https://doi.org/10.1021/acssensors.9b00865
Publication status	Published - 26 Jul 2019
Externally published	Yes

Keywords

Helmholtz cavity
finite-element method
phononic crystal
ring resonator
ultrasonic gas sensors

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10.1021/acssensors.9b00865

Cite this

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title = "Ultrasonic Gas Sensing by Two-Dimensional Surface Phononic Crystal Ring Resonators",

abstract = "An acoustic ring resonator employing a two-dimensional surface phononic crystal is proposed for high-sensitivity detection in binary gas mixtures. Band analyses and frequency-domain simulations via the finite-element method reveal that a single band for spoof surface acoustic waves appears at ultrasonic frequencies around 58 kHz where modification of its dispersion due to varying gas composition results in a linear shift of the resonance frequency. The shift rate is -17.3 and 8.8 mHz/ppm for CO2 and CH4, respectively. The linear shift of resonance frequency is experimentally validated. In addition, the ring resonator can also be employed to track acoustic intensity variation with gas concentration, where exponentially decaying intensity for low concentrations leverages high-sensitivity operation.",

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T1 - Ultrasonic Gas Sensing by Two-Dimensional Surface Phononic Crystal Ring Resonators

AU - Cicek, Ahmet

AU - Trak, Digdem

AU - Arslan, Yasin

AU - Korozlu, Nurettin

AU - Kaya, Olgun A.

AU - Ulug, Bulent

PY - 2019/7/26

Y1 - 2019/7/26

N2 - An acoustic ring resonator employing a two-dimensional surface phononic crystal is proposed for high-sensitivity detection in binary gas mixtures. Band analyses and frequency-domain simulations via the finite-element method reveal that a single band for spoof surface acoustic waves appears at ultrasonic frequencies around 58 kHz where modification of its dispersion due to varying gas composition results in a linear shift of the resonance frequency. The shift rate is -17.3 and 8.8 mHz/ppm for CO2 and CH4, respectively. The linear shift of resonance frequency is experimentally validated. In addition, the ring resonator can also be employed to track acoustic intensity variation with gas concentration, where exponentially decaying intensity for low concentrations leverages high-sensitivity operation.

AB - An acoustic ring resonator employing a two-dimensional surface phononic crystal is proposed for high-sensitivity detection in binary gas mixtures. Band analyses and frequency-domain simulations via the finite-element method reveal that a single band for spoof surface acoustic waves appears at ultrasonic frequencies around 58 kHz where modification of its dispersion due to varying gas composition results in a linear shift of the resonance frequency. The shift rate is -17.3 and 8.8 mHz/ppm for CO2 and CH4, respectively. The linear shift of resonance frequency is experimentally validated. In addition, the ring resonator can also be employed to track acoustic intensity variation with gas concentration, where exponentially decaying intensity for low concentrations leverages high-sensitivity operation.

KW - Helmholtz cavity

KW - finite-element method

KW - phononic crystal

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Ultrasonic Gas Sensing by Two-Dimensional Surface Phononic Crystal Ring Resonators

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Keywords

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