Spatial Coherency of Light and Nonlinear Optical Properties of Colloidal Gold Studied by CW Z-Scan Technique
Journal Title: NanoWorld Journal - Year 2016, Vol 2, Issue 1
Abstract
Nonlinear refraction and absorption of a suspension of Au nanoparticles was studied by CW Z-scan at near-resonant excitation. Spatial coherency and selfinterference of the laser beam results in the emerging of ring-like interference pattern observed at the plane of the detector. The number of the interference fringes and their diameter depends on volume fraction of the nanoparticles and laser fluence at focal point. Periodical light intensity distribution across the laser beam causes modulation in the output signal that should be considered for the correct interpretation of Z-scan data.
Authors and Affiliations
Roman V. Gamernyk, Mykola V. Periv, Serhiy Z. Malynych, Oleksandr S. Zaichenko
Keywords
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- EP ID EP223277
- DOI 10.17756/nwj.2016-021
- Views 110
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