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MoTe2 Photodetector for Integrated Lithium Niobate Photonics
2025
发表期刊NANOMATERIALS (IF:4.4[JCR-2023],4.7[5-Year])
ISSN2079-4991
EISSN2079-4991
卷号15期号:1
发表状态已发表
DOI10.3390/nano15010072
摘要

The integration of a photodetector that converts optical signals into electrical signals is essential for scalable integrated lithium niobate photonics. Two-dimensional materials provide a potential high-efficiency on-chip detection capability. Here, we demonstrate an efficient on-chip photodetector based on a few layers of MoTe2 on a thin film lithium niobate waveguide and integrate it with a microresonator operating in an optical telecommunication band. The lithium-niobate-on-insulator waveguides and micro-ring resonator are fabricated using the femtosecond laser photolithography-assisted chemical-mechanical etching method. The lithium niobate waveguide-integrated MoTe2 presents an absorption coefficient of 72% and a transmission loss of 0.27 dB mu m(-1) at 1550 nm. The on-chip photodetector exhibits a responsivity of 1 mA W-1 at a bias voltage of 20 V, a low dark current of 1.6 nA, and a photo-dark current ratio of 108 W-1. Due to effective waveguide coupling and interaction with MoTe2, the generated photocurrent is approximately 160 times higher than that of free-space light irradiation. Furthermore, we demonstrate a wavelength-selective photonic device by integrating the photodetector and micro-ring resonator with a quality factor of 10(4) on the same chip, suggesting potential applications in the field of on-chip spectrometers and biosensors.

关键词on-chip photodetectors MoTe2 microresonator lithium niobate photonics photolithography-assisted chemical-mechanical etching
URL查看原文
收录类别SCI
语种英语
资助项目National Key R&D Program of China[
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号WOS:001395081500001
出版者MDPI
文献类型期刊论文
条目标识符https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/483908
专题物质科学与技术学院
物质科学与技术学院_博士生
通讯作者Sun, Xinxing; Cheng, Ya
作者单位
1.Chinese Acad Sci, Shanghai Inst Opt & Fine Mech SIOM, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China
2.Chinese Acad Sci, Shanghai Inst Opt & Fine Mech SIOM, CAS Ctr Excellence Ultraintense Laser Sci, Shanghai 201800, Peoples R China
3.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China
4.East China Normal Univ, Sch Phys & Elect Sci, Extreme Optoelectromechan Lab XXL, Shanghai 200241, Peoples R China
第一作者单位物质科学与技术学院
推荐引用方式
GB/T 7714
Dong, Qiaonan,Sun, Xinxing,Gao, Lang,et al. MoTe2 Photodetector for Integrated Lithium Niobate Photonics[J]. NANOMATERIALS,2025,15(1).
APA Dong, Qiaonan,Sun, Xinxing,Gao, Lang,Zheng, Yong,Wu, Rongbo,&Cheng, Ya.(2025).MoTe2 Photodetector for Integrated Lithium Niobate Photonics.NANOMATERIALS,15(1).
MLA Dong, Qiaonan,et al."MoTe2 Photodetector for Integrated Lithium Niobate Photonics".NANOMATERIALS 15.1(2025).
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