Resumen
We show that the front photoacoustic signal due to a sample consisting of a glass plate with a metal coated surface, at which thermal waves are generated by periodical light absorption, enhances for certain modulation frequencies when the other glass surface is covered with a liquid sample. This contradicts the intuitive expectation based on the assumption that the liquid provides a new channel for heat conduction thereby decreasing the substrate temperature. Experimental results are shown and the described effect is explained using a thermal wave interference model.
Idioma original | Inglés |
---|---|
Páginas (desde-hasta) | 634-638 |
Número de páginas | 5 |
Publicación | Central European Journal of Physics |
Volumen | 8 |
N.º | 4 |
DOI | |
Estado | Publicada - ago. 2010 |
Publicado de forma externa | Sí |