Nonlinear diffraction from a virtual beam

Solomon M. Saltiel; Dragomir N. Neshev; Wieslaw Krolikowski; Noa Voloch-Bloch; Ady Arie; Ole Bang; Yuri S. Kivshar

doi:10.1103/PhysRevLett.104.083902

Nonlinear diffraction from a virtual beam

Solomon M. Saltiel, Dragomir N. Neshev, Wieslaw Krolikowski, Noa Voloch-Bloch, Ady Arie, Ole Bang, Yuri S. Kivshar

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

Abstract

We observe experimentally a novel type of nonlinear diffraction in the process of two-wave mixing on a nonlinear quadratic grating. We demonstrate that when the nonlinear grating is illuminated simultaneously by two noncollinear beams, a second-harmonic diffraction pattern is generated by a virtual beam propagating along the bisector of the two pump beams. The observed diffraction phenomena is a purely nonlinear effect that has no analogue in linear diffraction.

Original language	English
Article number	083902
Journal	Physical Review Letters
Volume	104
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.104.083902
Publication status	Published - 23 Feb 2010

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abstract = "We observe experimentally a novel type of nonlinear diffraction in the process of two-wave mixing on a nonlinear quadratic grating. We demonstrate that when the nonlinear grating is illuminated simultaneously by two noncollinear beams, a second-harmonic diffraction pattern is generated by a virtual beam propagating along the bisector of the two pump beams. The observed diffraction phenomena is a purely nonlinear effect that has no analogue in linear diffraction.",

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AU - Neshev, Dragomir N.

AU - Krolikowski, Wieslaw

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AU - Arie, Ady

AU - Bang, Ole

AU - Kivshar, Yuri S.

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N2 - We observe experimentally a novel type of nonlinear diffraction in the process of two-wave mixing on a nonlinear quadratic grating. We demonstrate that when the nonlinear grating is illuminated simultaneously by two noncollinear beams, a second-harmonic diffraction pattern is generated by a virtual beam propagating along the bisector of the two pump beams. The observed diffraction phenomena is a purely nonlinear effect that has no analogue in linear diffraction.

AB - We observe experimentally a novel type of nonlinear diffraction in the process of two-wave mixing on a nonlinear quadratic grating. We demonstrate that when the nonlinear grating is illuminated simultaneously by two noncollinear beams, a second-harmonic diffraction pattern is generated by a virtual beam propagating along the bisector of the two pump beams. The observed diffraction phenomena is a purely nonlinear effect that has no analogue in linear diffraction.

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JO - Physical Review Letters

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Nonlinear diffraction from a virtual beam

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