Coherence Switching with Metamaterials

Matias Koivurova, Tommi K. Hakala, Jari Turunen, Ari T. Friberg, Humeyra Caglayan, Marco Ornigotti

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We demonstrate, theoretically, how the insertion of an enhanced epsilon-near-zero (EENZ) mirror in a laser cavity grants exceptional control over the coherence properties of the emitted light beam. By exploiting the peculiar sensitivity to polarization of EENZ materials, we achieve superior control over the spatial coherence of the emitted laser light, which can be switched at will between nearly incoherent and fully coherent, solely by means of polarization optics. Our EENZ cavity design is expected to be an efficient, compact, reconfigurable, and easily scalable source of light for illumination and speckle contrast imaging, as well as any other application that benefits from controlled spatial coherence.

Original languageEnglish
Article number153902
Number of pages6
JournalPhysical Review Letters
Issue number15
Publication statusPublished - Oct 2021
Publication typeA1 Journal article-refereed

Publication forum classification

  • Publication forum level 3

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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