Colloidal crystal photothermal dynamics
作者： R. Kesavamoorthy , S. Jagannathan , Paul A. Rundquist , Sanford A. Asher
DOI: 10.1063/1.460554
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摘要: Localized heating of a colloidal crystal by absorption high intensity laser radiation (>25 W/cm2 ) results in compression the hot region. The time dependent variations lattice spacing due to this local has been studied monitoring transmission profile weak beam incident on at an angle close Bragg angle. dynamics phenomenon and its subsequent relaxation after removing pump are analyzed using screened Coulomb pair potential formulation. A simple linear model is developed explain deformation during both cooling processes. Using we estimate temperature rise for any given power. During process early stages change lags behind rate change, while later it follows cooling. We demonstrate necessity renormalization surface charge particles when potential.
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