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

Mohamed Farhat, Waqas Waseem Ahmed, Abdelkrim Khelif, Khaled N. Salama, Ying Wu

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


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.
Original languageEnglish (US)
Pages (from-to)104902
JournalJournal of Applied Physics
Issue number10
StatePublished - Mar 14 2021

ASJC Scopus subject areas

  • General Physics and Astronomy


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