Abstract
Whispering-gallery-mode (WGM) microcavities are very important in both fundamental science and practical applications, among which on-chip second-order nonlinear microresonators play an important role in integrated photonic functionalities. Here we demonstrate resonant second-harmonic generation (SHG) and cascaded third-harmonic generation (THG) in a lithium niobate-on-insulator (LNOI) microdisk resonator. Efficient SHG in the visible range was obtained with only several mW input powers at telecom wavelengths. THG was also observed through a cascading process, which reveals simultaneous phase matching and strong mode coupling in the resonator. Cascading of second-order nonlinear processes gives rise to an effectively large third-order nonlinearity, which makes on-chip second-order nonlinear microresonators a promising frequency converter for integrated nonlinear photonics.
© 2017 Optical Society of America
Full Article | PDF ArticleMore Like This
Shijie Liu, Yuanlin Zheng, Zhiwei Fang, Xiaona Ye, Ya Cheng, and Xianfeng Chen
Opt. Lett. 44(6) 1456-1459 (2019)
Tingting Ding, Yuanlin Zheng, and Xianfeng Chen
Opt. Lett. 44(6) 1524-1527 (2019)
Xiaona Ye, Shijie Liu, Yuping Chen, Yuanlin Zheng, and Xianfeng Chen
Opt. Lett. 45(2) 523-526 (2020)