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Anti-diffracting beams through the diffusive optical nonlinearity

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Opt. Express, 22 (25): 31434--31439 (декабря 2014)

Аннотация

Anti-diffraction is a theoretically predicted nonlinear optical phenomenon that occurs when a light beam spontaneously focalizes independently of its intensity. We observe anti-diffracting beams supported by the peak-intensity-independent diffusive nonlinearity that are able to shrink below their diffraction-limited size in photorefractive lithium-enriched potassium-tantalate-niobate (KTN:Li).

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