期刊
OPTICS LETTERS
卷 42, 期 18, 页码 3626-3629出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.42.003626
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资金
- National Natural Science Foundation of China (NSFC) [11604206, 61235009, 61590934]
- Shanghai Education Development Foundation (SHEDF) [16CG08]
- Shanghai Municipal Education Commission [16CG08]
- National Key R&D Program of China [2017YFA0303700]
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. (C) 2017 Optical Society of America
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