Metasurface-assisted phase-matching-free second harmonic generation in lithium niobate waveguides

Phase matching is a crucial condition for nonlinear optical processes. Here, Wang et al. demonstrate that a gradient metasurface composed of phased array antennas allows phase-matching-free frequency conversion over a pump wavelength range of almost 100 nm.

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Bibliographic Details
Main Authors: Cheng Wang, Zhaoyi Li, Myoung-Hwan Kim, Xiao Xiong, Xi-Feng Ren, Guang-Can Guo, Nanfang Yu, Marko Lončar
Format: article
Language:EN
Published: Nature Portfolio 2017
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Online Access:https://doaj.org/article/fb8b1a0b377141e79ac26cfa9227aca8
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