Abstract
Dark beams are wave fields carrying information in dark regions. We experimentally demonstrate dark beams that maintain a constant notch shape and size along a predetermined domain in free space. The energy is concentrated around the dark region with negligible sidelobes. These beams are generated with low-information-content phase-only diffractive elements in an on-axis configuration.
© 1996 Optical Society of America
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Boris Spektor, Rafael Piestun, and Joseph Shamir, "Dark beams with a constant notch: erratum," Opt. Lett. 21, 911-911 (1996)https://opg.optica.org/ol/abstract.cfm?uri=ol-21-12-911
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