by a cascade optical field modulation strategy facilitating selective multispectral narrow-band near-infrared photodetection

作     者：Yanan Ji Wen Xu Nan Ding Haitao Yang Hongwei Song Qingyun Liu Hans Agren Jerker Widengren Haichun Liu 

作者机构：State Key Laboratory of Integrated OptoelectronicsCollege of Electronic Science and EngineeringJilin University130012 ChangchunChina Department of Theoretical Chemistry and BiologyKTH Royal Institute of TechnologySE-10691StockholmSweden Department of Applied PhysicsKTH Royal Institute of TechnologySE-10691StockholmSweden 

出 版 物：《Light(Science & Applications)》 (光（科学与应用)（英文版）)

年 卷 期：2020年第9卷第1期

页      面：229-240页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11974143,11874181,61822506,and U1801253) the Special Project of the Province-University Co-constructing Program of Jilin Province(SXGJXX2017-3) support from the Swedish Research Council(VR 2016-03804) the Carl Tryggers Foundation(CTS 18:229) the AForsk Foundation(19-424) the Olle Engkvists Foundation(200-0514) support from the Swedish Research Council(VR 2016-03319) support from the Swedish Foundation for Strategic Research(SSF ITM17-0491) 

主　　题：narrow bands spectral 

摘      要：Since selective detection of multiple narrow spectral bands in the near-infrared(NIR)region still poses a fundamental challenge,we have,in this work,developed NIR photodetectors(PDs)using photon upconversion nanocrystals(UCNCs)combined with perovskite *** conquer the relatively high pumping threshold of UCNCs,we designed a novel cascade optical field modulation strategy to boost upconversion luminescence(UCL)by cascading the superlensing effect of dielectric microlens arrays and the plasmonic effect of gold nanorods,which readily leads to a UCL enhancement by more than four orders of magnitude under weak light *** accommodating multiple optically active lanthanide ions in a core-shell-shell hierarchical architecture,developed PDs on top of this structure can detect three well-separated narrow bands in the NIR region,i.e.,those centered at 808,980,and 1540 *** to the large UCL enhancement,the obtained PDs demonstrate extremely high responsivities of 30.73,23.15,and 12.20 AW^(−1) and detectivities of 5.36,3.45,and 1.91×10^(11) Jones for 808,980,and 1540 nm light detection,respectively,together with short response times in the range of 80-120 ***,we demonstrate for the first time that the response to the excitation modulation frequency of a PD can be employed to discriminate the incident light *** believe that our work provides novel insight for developing NIR PDs and that it can spur the development of other applications using upconversion nanotechnology.