Nonlinear holography in 3D χ(2) structures (Invited Paper)

Nonlinear holography emerges as a promising technique for optical storage and optical display, in which the newly-generated optical frequencies not only provide extra multiplexing channels but also help in security encryption. Recently, the successful fabrication of 3D χ(2) structures through femtosecond laser writing provides a powerful platform for multi-functional holography. Here, we report the novel designs of 3D χ(2) structures for dynamic nonlinear holography and frequency up-converted image processing.