Abstract
The molecular spectroscopy of a solution particle by structure resonance modulation spectroscopy is discussed [ S. Arnold and A. B. Pluchino, “ Infrared Spectrum of a Single Aerosol Particle by Photothermal Modulation of Structure Resonances,” Appl. Opt. 21, 4194 ( 1982); S. Arnold, et al., “ Molecular Spectroscopy of a Single Aerosol Particle,” Opt. Lett. 9, 4 ( 1984)]. Analytical equations are derived for time dependence of the particle radius as it interacts with a low intensity IR source (<20 mW/cm2). This formalism is found to be in good agreement with pulsed experiments. Working equations for the spectroscopy are derived for both constant and periodic IR excitation.
© 1985 Optical Society of America
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