Enhanced acoustic pressure sensors based on coherent perfect absorber-laser effect

Lasing is a well-established field in optics with several applications. Yet, having lasing or huge amplification in other wave systems remains an elusive goal. Here, we utilize the concept of coherent perfect absorber-laser to realize an acoustic analog of laser with a proven amplification of more t...

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Veröffentlicht in:Journal of applied physics 2021-03, Vol.129 (10)
Hauptverfasser: Farhat, Mohamed, Ahmad, Waqas W., Khelif, Abdelkrim, Salama, Khaled N., Wu, Ying
Format: Artikel
Sprache:eng
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Zusammenfassung:Lasing is a well-established field in optics with several applications. Yet, having lasing or huge amplification in other wave systems remains an elusive goal. Here, we utilize the concept of coherent perfect absorber-laser to realize an acoustic analog of laser with a proven amplification of more than 10 4 in terms of the scattered acoustic signal at a frequency of a few kHz. The obtained acoustic laser (or the coherent perfect absorber-laser) is shown to possess extremely high sensitivity and figure of merit with regard to ultra-small variations of the pressure (density and compressibility) and suggests its evident potential to build future acoustic pressure devices such as precise sensors.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0041771