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Updated: Apr 20, 2026

Uncovering Hidden Dynamics of Natural Photonic Structures Using Holographic Imaging
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Nonlocal nonlinear refraction in Hibiscus sabdariffa with large phase shifts
Abstract:
In this work we present a study of nonlinear optical properties in organic materials (hibiscus sabdariffa). Our results demonstrate that the medium exhibits a highly nonlocal nonlinear response. We show preliminary numerical results of the transmittance as nonlocal response by considering, simultaneously, the nonlinear absorption and refraction in media. Numerical results are accord to measurement obtained by Z- scan technique where we observe large phase shifts. We also analyze the far field diffraction ring patterns of the sample.
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