Frequency width of open channels in multiple scattering media

Jeroen Bosch, Sebastianus A. Goorden, Allard P. Mosk

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

We report optical measurements of the spectral width of open transmission channels in a three-dimensional diffusive medium. The light transmission through a sample is enhanced by efficiently coupling to open transmission channels using repeated digital optical phase conjugation. The spectral properties are investigated by enhancing the transmission, fixing the incident wavefront and scanning the wavelength of the laser. We measure the transmitted field to extract the field correlation function and the enhancement of the total transmission. We find that optimizing the total transmission leads to a significant increase in the frequency width of the field correlation function. Additionally we find that the enhanced transmission persists over an even larger frequency bandwidth. This result shows open channels in the diffusive regime are spectrally much wider than previous measurements in the localized regime suggest.
Original languageEnglish
Pages (from-to)26472-26478
JournalOptics express
Volume24
Issue number23
DOIs
Publication statusPublished - 2016

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