WANG Yifan,YAO Yuan,ZHANG Hao,LIU Bo,DUAN Shaoxiang,LIN Wei.An electrically controlled tunable photonic crystal filter based on thin-film lithium niobate[J].Optoelectronics Letters,2024,(4):200-204 An electrically controlled tunable photonic crystal filter based on thin-film lithium niobate Author Name Affiliation WANG Yifan  Institute of Modern Optics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China  YAO Yuan  Institute of Modern Optics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai 519000, China  ZHANG Hao  Institute of Modern Optics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China  LIU Bo  Institute of Modern Optics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai 519000, China  DUAN Shaoxiang  Institute of Modern Optics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai 519000, China  LIN Wei  Institute of Modern Optics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Nankai University, Tianjin 300350, China Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, Nankai University, Tianjin 300350, China  Abstract:       In this paper, we present an electrically controlled tunable narrowband filter based on a thin-film lithium niobate two-dimensional (2D) photonic crystal. The filter incorporates a photonic crystal microcavity structure within the straight waveguide, enabling electronic tuning of the transmitted wavelength through added electrode structures. The optimized microcavity filter design achieves a balance between high transmission rate and quality factor, with a transmission center wavelength of 1 551.6 nm, peak transmission rate of 96.1%, and quality factor of 5 054. Moreover, the filter can shift the central wavelength of the transmission spectrum by applying voltage to the electrodes, with a tuning sensitivity of 13.8 pm/V. The proposed tunable filter adopts a simple-to-fabricate air-hole structure and boasts a compact size (length:11.57 μm, width:5.27 μm, area:60.97 μm2), making it highly suitable for large-scale integration. These features make the filter promising for broad applications in the fields of photonic integration and optical communication. Hits: 0 Download times: 0 View Full Text    Download reader