Tailoring spontaneous infrared emission of HgTe quantum dots with laser-printed plasmonic arrays
作者机构：Institute of Automation and Control ProcessesFar Eastern BranchRussian Academy of SciencesVladivostok 690041Russia Far Eastern Federal UniversityVladivostok 690090Russia University of Technology SydneyNSW 2007 SydneyAustralia Department of Materials Science and Engineeringand Centre for Functional Photonics(CFP)City University of Hong KongKowloonHong Kong SARChina Engineering Research Center of Nano-Geomaterials of Ministry of EducationFaculty of Material Science and ChemistryChina University of GeosciencesWuhan 430074China Department of Electronic EngineeringThe Chinese University of Hong KongShatinNew TerritoriesHong Kong SARChina Swinburne University of TechnologyJohn St.HawthornVIC 3122Australia Melbourne Centre for NanofabricationANFF151 Wellington RoadClaytonVIC 3168Australia
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：1870-1879页
核心收录：
学科分类：0808[工学-电气工程] 080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学]
基 金：financial support by the Centre for Functional Photonics of City University of Hong Kong the Russian Science Foundation(grant No.17-19-01325) the Innovation and Technology Commission of Hong Kong(grant No.ITS/402/17)
主 题：quantum radiative coupling
摘 要：Chemically synthesized near-infrared to mid-infrared(IR)colloidal quantum dots(QDs)offer a promising platform for the realization of devices including emitters,detectors,security,and sensor ***,at longer wavelengths,the quantum yield of such QDs decreases as the radiative emission rate drops following Fermi’s golden rule,while non-radiative recombination channels compete with light *** over the radiative and non-radiative channels of the IR-emitting QDs is crucially important to improve the performance of IR-range ***,we demonstrate strong enhancement of the spontaneous emission rate of near-to mid-IR HgTe QDs coupled to periodically arranged plasmonic nanoantennas,in the form of nanobumps,produced on the surface of glasssupported Au films via ablation-free direct femtosecond laser *** enhancement is achieved by simultaneous radiative coupling of the emission that spectrally matches the first-order lattice resonance of the arrays,as well as more efficient photoluminescence excitation provided by coupling of the pump radiation to the local surface plasmon resonances of the isolated ***,coupling of the HgTe QDs to the lattice plasmons reduces the influence of non-radiative decay losses mediated by the formation of polarons formed between QD surface-trapped carriers and the IR absorption bands of dodecanethiol used as a ligand on the QDs,allowing us to improve the shape of the emission spectrum through a reduction in the spectral dip related to this ligand *** the ease of the chemical synthesis and processing of the HgTe QDs combined with the scalability of the direct laser fabrication of nanoantennas with tailored plasmonic responses,our results provide an important step towards the design of IR-range devices for various applications.
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