First direct measurement of the spatial coherence of sunlight

Heylal Mashaal, Alex Goldstein, Daniel Feuermann, Jeffrey M. Gordon

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

Direct sunlight is often deemed incoherent, hence unsuitable for antenna power conversion. However, all radiation exhibits spatial coherence when detected on a sufficiently small scale. We report the first direct measurement of the spatial coherence of solar beam radiation, achieved with a customized tabletop cyclic-shearing interferometer. Good agreementisfound between experiment and theory, with promising ramifications for solar aperture antennas.

Original languageEnglish
Pages (from-to)3516-3518
Number of pages3
JournalOptics Letters
Volume37
Issue number17
DOIs
StatePublished - 1 Sep 2012

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