Plane Photoacoustic Wave Generation In Liquid Water By THz-FELPaper (Chem 1)
Wed, 11 Nov 2020 06:00pm to 06:15pm
We demonstrate photoacoustic wave propagation with a plane wavefront in liquid water using a terahertz (THz) laser pulse. The THz light can effectively generate the photoacoustic wave because of strong absorption in water. The excitation of a large-area water surface irradiated by loosely focused THz light produces a plane photoacoustic wave. The photoacoustic wave is generated by incident THz light with a small radiant exposure of <1 mJ/cm2 and delivered 100 times deeper than the penetration depth of THz light for water. The THz-light-induced plane photoacoustic wave offers great advantages to non-invasive imaging for industrial and biological applications.
Authors: Tsubouchi, Masaaki; Hoshina, Hiromichi; Nagai, Masaya; Isoyama, Goro
Graduate School of Engineering Science, Osaka University, Institute of Scientific and Industrial Research, Osaka University, National Institutes for Quantum and Radiological Science and Technology, RIKEN Center for Advanced Photonics