Optical vortex beams, characterized by their helical phase fronts and orbital angular momentum (OAM), are pivotal in applications such as high-capacity communication, optical manipulation, and quantum ...
In the 1960s, thanks mainly to MIT mechanical-engineering professor Ascher Shapiro ’38, PhD ’46, the world became captivated by the question of how a bathtub drains. Harold Edgerton captured this side ...
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