Pub Date : 2025-01-14DOI: 10.1016/j.chip.2025.100128
Youtian Hu , Qingyun Li , Fan Yang , Jing Hu , Ximing Li , Jiale Ou , Zhenjun Zang , Bangyi Zhu , Qinyu Zeng , Huangpu Han , Yujie Ma , Wang Zhang , Shuangchen Ruan , Bingxi Xiang
Thin-film lithium niobate (TFLN) is considered a crucial platform innext-generationintegrated optoelectronics due to its excellent optical properties. Photodetectors are essential components for constructing fully functional photonic circuits. However, due to the low electrical conductivity and weak light absorption, TFLN cannot be directly used for fabricating photodetectors. In this study, we proposedand demonstratedahigh-performanceMoTe2/TFLN heterostructure integrated Schottky photodetector operating at telecommunication wavelengths (1310 nm and 1550 nm). This structure enhances the photovoltaic effect by bending MoTe2at the edge of one electrode, thereby achievingself-poweredoperation. At a wavelength of 1310 nm, the photodetector achieves aself-poweredresponsivity of 70 mA/W, which is among the highest forwaveguide-integratedphotodetectors. Additionally, due to the strong rectification effect of the Schottky junction, the photodetector exhibits an extremely low dark current of only 25 pA at −0.5 V bias voltage. The on/off ratios reach 2.6 × 104 at 0 V and 4.1 × 104 at −0.5 V bias. Theself-poweredresponse timesweremeasured, showing fast response and recovery times of 160 μs and 169 μs, respectively.
{"title":"Self-powered asymmetric Schottky photodetector integrated with thin-film lithium niobate waveguide","authors":"Youtian Hu , Qingyun Li , Fan Yang , Jing Hu , Ximing Li , Jiale Ou , Zhenjun Zang , Bangyi Zhu , Qinyu Zeng , Huangpu Han , Yujie Ma , Wang Zhang , Shuangchen Ruan , Bingxi Xiang","doi":"10.1016/j.chip.2025.100128","DOIUrl":"10.1016/j.chip.2025.100128","url":null,"abstract":"<div><div><strong>Thin-film lithium niobate (TFLN) is considered a crucial platform in</strong> <strong>next-generation</strong> <strong>integrated optoelectronics due to its excellent optical properties. Photodetectors are essential components for constructing fully functional photonic circuits. However, due to the low electrical conductivity and weak light absorption, TFLN cannot be directly used for fabricating photodetectors. In this study, we propose</strong><strong>d</strong> <strong>and demonstrate</strong><strong>d</strong> <strong>a</strong> <strong>high-performance</strong> <strong>MoTe</strong><sub><strong>2</strong></sub><strong>/TFLN heterostructure integrated Schottky photodetector operating at telecommunication wavelengths (1310 nm and 1550 nm). This structure enhances the photovoltaic effect by bending MoTe</strong><sub><strong>2</strong></sub> <strong>at the edge of one electrode, thereby achieving</strong> <strong>self-powered</strong> <strong>operation. At a wavelength of 1310 nm, the photodetector achieves a</strong> <strong>self-powered</strong> <strong>responsivity of 70 mA/W, which is among the highest for</strong> <strong>waveguide-integrated</strong> <strong>photodetectors. Additionally, due to the strong rectification effect of the Schottky junction, the photodetector exhibits an extremely low dark current of only 25 pA at −0.5 V bias voltage. The on/off ratios reach 2.6 × 10<sup>4</sup> at 0 V and 4.1 × 10<sup>4</sup> at −0.5 V bias. The</strong> <strong>self-powered</strong> <strong>response times</strong> <strong>were</strong> <strong>measured, showing fast response and recovery times of 160 μs and 169 μs, respectively.</strong></div></div>","PeriodicalId":100244,"journal":{"name":"Chip","volume":"4 2","pages":"Article 100128"},"PeriodicalIF":0.0,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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