PROBLEM TO BE SOLVED: To sufficiently widen the band of a probe for a photoacoustic device.SOLUTION: A probe for a photoacoustic device, which detects acoustic waves emitted from the body to be tested having been irradiated with light, includes: an inorganic transducer that includes a lower electrode 52, an inorganic piezoelectric thin film 53, and an upper electrode 54, and that detects acoustic waves in a predetermined first frequency domain and an organic transducer that includes a lower electrode 56, an organic piezoelectric thin film 57, and an upper electrode 58, that is formed so that the area of the signal electrode is larger than that of the inorganic transducer, and that detects acoustic waves in a second frequency domain that includes a domain of a lower frequency side than the first frequency domain.COPYRIGHT: (C)2013,JPO&INPIT【課題】光音響装置用プローブを十分に広帯域化する。【解決手段】光の照射を受けた被検体から発せられた音響波を検出する光音響装置用プローブにおいて、下部電極52、無機系圧電薄膜53および上部電極54からなり所定の第一の周波数領域にある音響波を検出する無機系トランスデューサと、下部電極56、有機系圧電薄膜57および上部電極58からなり上記無機系トランスデューサよりも信号電極面積が広く形成されて、前記第一の周波数領域よりも低周波側の領域を含む第二の周波数領域の音響波を検出する有機系トランスデューサとを設ける。【選択図】図3
