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  ______    ______   __   _     ______    _____   
 /_____//  /_   _// | || | ||  /_   _//  / ____|| 
 `____ `    -| ||-  | '--' ||   -| ||-  / //---`' 
 /___//     _| ||_  | .--. ||   _| ||_  \ \\___   
 `__ `     /_____// |_|| |_||  /_____//  \_____|| 
 /_//      `-----`  `-`  `-`   `-----`    `----`  
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Text this: Particle on the surface: Basic physical problems related to laser cleaning