Efficient and highly tunable second-harmonic generation in Z-cut periodically poled lithium niobate nanowaveguides

Abstract

Thin-film lithium-niobate-on-insulator (LNOI) has emerged as a superior integrated-photonics platform for linear, nonlinear, and electro-optics. Here we combine quasi-phase-matching, dispersion engineering, and tight mode confinement to realize nonlinear parametric processes with both high efficiency and wide wavelength tunability. On a millimeter-long, Z-cut LNOI waveguide, we demonstrate efficient ($1900 \pm 500\% \;{{\rm W}^{- 1}}\,{{\rm cm}^{- 2}}$) and highly tunable (${-}{1.71}\;{\rm nm/K}$) second-harmonic generation from 1530 to 1583 nm by type-0 quasi-phase-matching. Our technique is applicable to optical harmonic generation, quantum light sources, frequency conversion, and many other photonic information processes across visible to mid-IR spectral bands.

© 2020 Optical Society of America

Low-voltage tunable second-harmonic generation in an x-cut periodically poled lithium niobate waveguide

F. Généreux, G. Baldenberger, B. Bourliaguet, and R. Vallée
Opt. Lett. 32(9) 1108-1110 (2007)

Highly tunable second-harmonic generation in all-optically poled silicon nitride waveguides

Edgars Nitiss, Ozan Yakar, Anton Stroganov, and Camille-Sophie Brès
Opt. Lett. 45(7) 1958-1961 (2020)

Highly efficient second-harmonic generation in buried waveguides formed by annealed and reverse proton exchange in periodically poled lithium niobate

Krishnan R. Parameswaran, Roger K. Route, Jonathan R. Kurz, Rostislav V. Roussev, Martin M. Fejer, and Masatoshi Fujimura
Opt. Lett. 27(3) 179-181 (2002)

Periodically poled thin-film lithium niobate microring resonators with a second-harmonic generation efficiency of 250,000%/W

Juanjuan Lu, Joshua B. Surya, Xianwen Liu, Alexander W. Bruch, Zheng Gong, Yuntao Xu, and Hong X. Tang
Optica 6(12) 1455-1460 (2019)

Highly tunable efficient second-harmonic generation in a lithium niobate nanophotonic waveguide

Rui Luo, Yang He, Hanxiao Liang, Mingxiao Li, and Qiang Lin
Optica 5(8) 1006-1011 (2018)