In situ real-time beam monitoring with dielectric meta-holograms

Yoav Blau, Michal Eitan, Victor Egorov, Amir Boag, Yael Hanein, Jacob Scheuer

Research output: Contribution to journalArticlepeer-review


A novel approach for performing in situ and real-time beam monitoring, based on dielectric meta-hologram, is proposed and demonstrated. The ultrathin dielectric metahologram projects a portion of the beam power onto a screen to provide a visual indicator of the spatial intensity distribution of a Gaussian laser beam, as well as its waist position along the optical axis. Specifically, we demonstrate simple monitoring of the spot size, astigmatism, lateral position, and position along the optical axis of the beam. Good agreement is found with both theory and conventional knife-edge beam profiler measurements. This in situ beam monitoring approach could provide a highly useful tool for numerous optical applications.

Original languageEnglish
Pages (from-to)28469-28483
Number of pages15
JournalOptics Express
Issue number22
StatePublished - 29 Oct 2018

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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