biostudies-literatureUnknown28Song WUltrafast and sensitive response of surface plasmon polaritons to the ultrasonically-modulated changes in refractive index of the water allows photoacoustic impulses to be measured using surface plasmon resonance (SPR) sensors. However, the sensing modalities always suffer from either low sensitivity or instable signal output, possibly precluding imaging recovery. By exploiting that pressure transients can substantially produce phase shift in <i>p</i>-polarized optical reflection but have no impact on <i>s</i>-polarized component in SPR sensing, we develop a common-path interferometric SPR sensor for photoacoustic measurement, in which time-varying light interference between photoacoustically-perturbed <i>p</i>-polarized beam and its orthogonal <i>s</i>-polarized component of a single intePhotoacoustics100419https://www.ebi.ac.uk/biostudies/studies/S-EPMC9634362biostudies-literatureUltrasensitive broadband photoacoustic microscopy based on common-path interferometric surface plasmon resonance sensing.PMC9634362Shan YDong YMin CYuan XSong WYang FfalseUltrasensitive broadband photoacoustic microscopy based on common-path interferometric surface plasmon resonance sensing.Ultrafast and sensitive response of surface plasmon polaritons to the ultrasonically-modulated changes in refractive index of the water allows photoacoustic impulses to be measured using surface plasmon resonance (SPR) sensors. However, the sensing modalities always suffer from either low sensitivity or instable signal output, possibly precluding imaging recovery. By exploiting that pressure transients can substantially produce phase shift in <i>p</i>-polarized optical reflection but have no impact on <i>s</i>-polarized component in SPR sensing, we develop a common-path interferometric SPR sensor for photoacoustic measurement, in which time-varying light interference between photoacoustically-perturbed <i>p</i>-polarized beam and its orthogonal <i>s</i>-polarized component of a single inte2022-01-01T00:00:00Z2022 Dec2025-04-05T12:34:19.072Z2025-02-19T00:31:36.338ZS-EPMC96343623633963910.1016/j.pacs.2022.100419