What is it about?
This work reports the measurement of a frequency shift of optical beams carrying Orbital Angular Momentum (OAM) upon reflection on a rotating right angle prism. This rotational Doppler shift is observed via the interference of OAM beams with opposite topological charges leading to the rotation of the Daisy like interference pattern.
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Why is it important?
This is the first report of a Doppler shift upon reflexion on a simple object.
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This page is a summary of: Rotational Doppler shift upon reflection from a right angle prism, Applied Physics Letters, June 2020, American Institute of Physics, DOI: 10.1063/5.0009396.
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