Broadband Athermal Lithium Niobate Microresonators Across C and L Bands
- Resource Type
- Article
- Authors
- Han, Peishan; Yang, Lingyan; Xu, Lijuan; Zhou, Xiaoyan; Cai, Lutong; Agarwal, Anuradha Murthy; Michel, Jurgen; Kimerling, Lionel C.; Zhang, Lin
- Source
- Journal of Lightwave Technology; 2024, Vol. 42 Issue: 9 p3246-3250, 5p
- Subject
- Language
- ISSN
- 07338724; 15582213
Thin-film lithium niobate holds great promise for developing high-performance integrated photonic devices, but it is susceptible to temperature variation due to its thermo-optic effect and low thermal conductivity. We propose a broadband athermal microresonator in a lithium niobate-titanium dioxide hybrid platform and can flexibly adjust the mode field distributions in different materials to greatly suppress the effective thermo-optical coefficient. The measured temperature-dependent wavelength shift is as low as ±1 pm/K over a wide wavelength range from 1480 nm to 1630 nm. This paves the way for developing thin-film lithium niobate photonic devices with low temperature sensitivity for practical applications.