Periodically poled lithium niobate whispering gallery mode microcavities on a chip

• 来源期刊: 中国科学:物理学 力学 天文学（英文版）
• 年，卷（期）: 2018,（11）
• 页码范围: 36-40
• 页数: 5页
• 语种: 英文

摘要

In this study,we investigate the fabrication of periodically poled lithium niobate (PPLN) microdisk cavities on a chip.These resonators are fabricated from a PPLN film with a 16 μm poling period on insulator using conventional microfabrication techniques.The quality factor of the PPLN microdisk resonators with a 40-μm radius and a 700-nm thickness is 6.7×105.Second harmonic generation (SHG) with an efficiency of 2.2× 10-6 mW-1 is demonstrated in the fabricated PPLN microdisks.The nonlinear conversion efficiency could be considerably enhanced by optimizing the period and pattern of the poled structure and by improving the cavity quality factors.