Conference paper
Photothermal spectroscopy as a sensitive spectroscopic tool
A.C. Tam
SPIE Optics, Electro-Optics, and Laser Applications in Science and Engineering 1991
The phase angle of a gas-coupled photoacoustic (PA) signal has been measured as a function of coupling gas column thickness lg for a]] one-dimensional" PA cell. The PA signal is excited by a modulated continuous laser beam incident on an opaque solid surface of silicon. We show that the observed data can be explained in a PA model including the consideration of a residual volume in the PA cell, together with the consideration of viscous damping of the PA signal at small lg.
A.C. Tam
SPIE Optics, Electro-Optics, and Laser Applications in Science and Engineering 1991
A.C. Tam
ASME Winter Conference 1992
A.C. Tam
Infrared Physics
A.C. Tam, H. Sontag, et al.
IUS 1984