Tunable and stable micro-ring resonator based on thin-film lithium tantalate
Jiayang Yu,
Ziliang Ruan,
Yu Xue,
Haohua Wang,
Ranfeng Gan,
Tian Gao,
Changjian Guo,
Kaixuan Chen,
Xin Ou,
Liu Liu
Affiliations
Jiayang Yu
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Higher-Education Mega-Center, Sci. Bldg. No. 5, Guangzhou 510006, China
Ziliang Ruan
State Key Laboratory of Extreme Photonics and Instrumentation, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zijingang Campus, Zhejiang University, East Bldg. No. 5, Hangzhou 310058, China
Yu Xue
State Key Laboratory of Extreme Photonics and Instrumentation, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zijingang Campus, Zhejiang University, East Bldg. No. 5, Hangzhou 310058, China
Haohua Wang
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Higher-Education Mega-Center, Sci. Bldg. No. 5, Guangzhou 510006, China
Ranfeng Gan
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Higher-Education Mega-Center, Sci. Bldg. No. 5, Guangzhou 510006, China
Tian Gao
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Higher-Education Mega-Center, Sci. Bldg. No. 5, Guangzhou 510006, China
Changjian Guo
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Higher-Education Mega-Center, Sci. Bldg. No. 5, Guangzhou 510006, China
Kaixuan Chen
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Higher-Education Mega-Center, Sci. Bldg. No. 5, Guangzhou 510006, China
Xin Ou
National Key Laboratory of Materials for Integrated Circuits, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 200050 Shanghai, China
Liu Liu
State Key Laboratory of Extreme Photonics and Instrumentation, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zijingang Campus, Zhejiang University, East Bldg. No. 5, Hangzhou 310058, China
As ferroelectric materials, lithium tantalate and lithium niobate share similar material characteristics, such as a high Pockels effect and nonlinear optical coefficients. When compared to lithium niobate, lithium tantalate offers a higher optical damage threshold, a broader transparent window, and lower birefringence, making it a promising candidate for high-performance electro-optical photonic integrated devices. In this study, we design and successfully fabricate micro-ring resonators on an acoustic-grade lithium-tantalate-on-insulator wafer, demonstrating their tunability and dynamic modulation capabilities. Experimental results indicate that the achieved thin-film lithium tantalate based micro-ring resonator exhibits an intrinsic Q-factor of 8.4 × 105, corresponding to a waveguide propagation loss of 0.47 dB/cm and a tuning efficiency of 1.94 pm/V. More importantly, as compared to those based on thin-film lithium niobate, a much weaker photorefractive effect and drift phenomenon around the 1550 nm wavelength under a direct-current drive are observed in the present fabricated thin-film lithium tantalate micro-rings with a silicon oxide over-cladding and a tuning electrode on top.
