Analogous to the behavior of a common converging lens for the input of tilted waves, a recent publication suggests a new optical element with an azimuthal-quadratic phase profile for the focusing of orbital angular momentum beams at distinct angular positions. Its realization in a metasurface form enables the combined measurement of orbital and spin angular momentum using a single optical component.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8102526 | PMC |
| http://dx.doi.org/10.1038/s41377-021-00541-6 | DOI Listing |
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