FigsharePub Date : 2025-07-22DOI: 10.1021/acsaom.5c00178.s002
Reyihanguli Tudi (21762817), Shuhan Li (5684267), Minjie Zhou (1666078), Zhongxin Zhang (4474906), Bumaliya Abulimiti (21513929), Mei Xiang (1591813)
{"title":"All-Optical Broadband Terahertz Modulator Based onCsPbX<sub>3</sub>(X = Cl, Br) Perovskite Quantum Dots Heterostructure","authors":"Reyihanguli Tudi (21762817), Shuhan Li (5684267), Minjie Zhou (1666078), Zhongxin Zhang (4474906), Bumaliya Abulimiti (21513929), Mei Xiang (1591813)","doi":"10.1021/acsaom.5c00178.s002","DOIUrl":"https://doi.org/10.1021/acsaom.5c00178.s002","url":null,"abstract":"All-optical THz heterojunction modulators have gained significant attention to meet the demanding requirements of next-generation wireless communication technologies. Self-powered heterojunction photodetectors have high separation and utilization of photoinduced charge carriers even without external power sources. This high efficiency separation is attributed to the built-in electric field between heterojunction layers, a crucial factor for all-optical THz heterojunction modulators. However, CsPbX<sub>3</sub>/Si heterojunctions exhibit excellent optical and electrical properties, positioning them as promising candidates for high-performance all-optical terahertz (THz) modulators. Here, the perovskite quantum dots CsPbCl<sub>3</sub>/Si and CsPbBr<sub>3</sub>/Si are studied to achieve broadband modulation (0.3–1.6THz) at low laser power based on all-optically controlled terahertz modulators, with modulation depths of 81% and 70%, respectively, and the bare silicon exceeds this by 8 times. The results suggest that self-powered photodetectors could serve as a promising source for high-performance terahertz modulators. Additionally, THz-TDS emerges as a sensitive and noncontact technique for evaluating the performance of photodetectors.","PeriodicalId":522641,"journal":{"name":"Figshare","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147900725","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}