ON THE SIMULTANEOUS EFFECT OF BEAM DEFLECTION AND THERMAL LENSING PHENOMENA IN PHOTOTHERMAL SPECTROMETRY |
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| Authors: | G Močnik M Franko Z Bozoki D Bicanic H Jalink |
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| Affiliation: | 1. Department of Physical and Organic Chemistry , Jo?ef Stefan Institute , Jamova 39 1000, Ljubljana, Slovenia;2. Department of Physical and Organic Chemistry , Jo?ef Stefan Institute , Jamova 39 1000, Ljubljana, Slovenia;3. Department of Physical and Analytical Environmental Chemistry , School of Environmental Sciences , P O Box 301 5001, Nova Gorica, Slovenia;4. Department of Optics and Quantum Electronics , Jozef Atilla University (JATE) , Dom Ter 9 Szeged, Hungary;5. Laser Photoacoustics Laboratory, Department of Agricultural Engineering and Physics Wageningen Agricultural University , Bomenweg 4 6703 HD Wageningen The, Netherlands;6. Centre for Plant Breeding and Reproduction Research CPRO-DLO , P O Box 16 6700 AA Wageningen The, Netherlands |
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| Abstract: | Abstract A general model that accounts for a combined effect of thermal lensing and photothermal beam deflection was derived. The model enables the estimation of contributions to the measured photothermal signal from each of the two phenomena. Experimental parameters such as modulation frequency, the pump beam diameter, and the position of detector can be optimized using this model in order to minimize the unwanted effects of misalignment or laser pointing instability, and to improve the accuracy of thermal lens and photothermal beam deflection spectrometry. |
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