Optically induced three-dimensional nonlinear photonic lattices in LiNbO3:Fe crystal

We fabricate three-dimensional nonlinear photonic lattices in self-defocusing iron-doped lithium niobate photorefractive crystal for the first time by an improved Michelson interferometer device. The experimental setup is simple and inexpensive. The period of the induced photonic lattices can be dominated easily. We analyze the three-dimensional nonlinear photonic lattices by plane wave guiding and far field diffraction pattern imaging. The induced nonlinear photonic lattices can exist stably for a long time in the photorefractive crystal.

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► We fabricate 3D nonlinear photonic lattices in LiNbO3:Fe crystal for the first time.
► The experimental setup is simple and inexpensive.
► The period of the induced photonic lattices can be dominated easily.
► The photonic lattices can exist stably for a long time in the LiNbO3:Fe crystal.
► It increases the possibility of practical application of the 3D photonic lattices.