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Photoacoustic effect in a flowing liquid
Applied Optics, 1985In certain applications of photoacoustic spectroscopy it is desirable to measure the photoacoustic signal from a liquid which is in motion. This may be the case, for example, in the study of corrosion at a solid-liquid interface. To understand how the photoacoustic signal is altered by the motion of the sample, experiments were performed on a specially
R S, Quimby, A I, Sheinis
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Fiber Optic Sensors Based on Photoacoustic Effect for Rebar Corrosion Measurement
IEEE Transactions on Instrumentation and Measurement, 2019An all-optical ultrasound sensing system based on photoacoustic principle is developed to monitor and investigate the initiation of early stage steel rebar corrosion in real time.
C. Du +5 more
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Enhancement of the photoacoustic effect during the light-particle interaction.
NanoscaleExogenous photoacoustic contrast agents such as gold nanoparticles are widely utilized in photoacoustic imaging. Enhancing the photoacoustic performance of gold nanoparticles is pivotal for improving the quality and expanding the application scope of ...
Yukun Ji +4 more
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Photoacoustic Spectroscopy — Photoacoustic and Photothermal Effects
1990Definition. Photoacoustic (PA) or optoacoustic measurements in the original, strict sense comprise the detection of acoustic waves which arise from non-radiative de-excitation (radiationless transition) of the sample as a consequence of absorption of continuously amplitude-modulated light.
C. Buschmann, H. Prehn
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Photoacoustic effect in strongly absorbing fluids
Ultrasonics, 1991Abstract Ultrasonic waves with an exponential temporal profile are produced when a short pulse of radiation is absorbed in an optically thick fluid. Here, one-dimensional frequency and time domain solutions for the pressure are given for Beer's law absorption of radiation in a fluid in contact with a second transparent medium.
S.M. Park +3 more
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The Photoacoustic Effect in Semiconductors
physica status solidi (b), 1983AbstractA theory of the photoacoustic effect (PAE) in semiconductors is developed for the region of fundamental absorption, taking into account the generation of free electrons and holes, their diffusion, and recombination. The temperature on the illuminated surface of a semiconductor is calculated in a general form.
V. A. Sablikov, V. B. Sandomirskii
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ACS Sensors, 2020
A sensitive photoacoustic sensor system for the detection of ppb-level sulfur dioxide (SO2) was developed by the use of a continuous-wave (CW) room-temperature, high-power quantum cascade laser (QCL) with an external diffraction grating cavity geometry ...
Xukun Yin +9 more
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A sensitive photoacoustic sensor system for the detection of ppb-level sulfur dioxide (SO2) was developed by the use of a continuous-wave (CW) room-temperature, high-power quantum cascade laser (QCL) with an external diffraction grating cavity geometry ...
Xukun Yin +9 more
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Small, 2020
The miniaturization of gold nanorods exhibits a bright prospect for intravital photoacoustic imaging (PAI) and the hollow structure possesses a better plasmonic property.
Kai Cai +9 more
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The miniaturization of gold nanorods exhibits a bright prospect for intravital photoacoustic imaging (PAI) and the hollow structure possesses a better plasmonic property.
Kai Cai +9 more
semanticscholar +1 more source
Helmholtz resonance effect in photoacoustic cells
Applied Optics, 1979Some types of photoacoustic spectroscopy sample cells exhibit acoustic resonances which are not explained by organ pipe or Bessel mode analysis. It is demonstrated here that one type of acoustic resonance encountered is explained by a Helmholtz resonator analysis.
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Pulsed Photoacoustic Effect in Semiconductors
Japanese Journal of Applied Physics, 1991Acoustic and thermal components of signal waveforms generated in Si and CdS samples, which are irradiated by Nd:YAG and Ruby laser pulse, are detected by PZT and PVF2 transducers over a time range of 0.1 µs to several ms. The sound velocity of propagating longitudinal wave and the vibration modes of the sample can be analyzed from the acoustic wave ...
Masahito Watanabe +4 more
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