Laser nanostructuring for plasmon enhancement of Ag/ZnO optical characteristics

被引：1
|
作者：
Koleva, M. E. [1 ]
Nedyalkov, N. N. [1 ]
Fukata, N. [2 ]
Jevasuwan, W. [2 ]
Amoruso, S. [3 ]
机构：
[1] Bulgarian Acad Sci, Inst Elect, 72 Tsarigradsko Chaussee Blvd, BU-1784 Sofia, Bulgaria
[2] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan
[3] Univ Naples Federico II, Dipartimento Fis Ettore Pancini, Scuola Politecn & Sci Base, Complesso Univ Monte S Angelo,Via Cintia, I-80126 Naples, Italy
来源：
19TH INTERNATIONAL CONFERENCE AND SCHOOL ON QUANTUM ELECTRONICS: LASER PHYSICS AND APPLICATIONS | 2017年 / 10226卷
关键词：
PLD; laser nanostructuring; surface plasmon resonance; nanocomposites; FLUORESCENCE; RESONANCE; OXIDE;
D O I：
10.1117/12.2262097
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The experimental and theoretical investigations of the optical characteristics of laser nanostructured Ag nanoparticles (AgNPs) in ZnO medium are of particular interest for this study. The Ag-ZnO nanocomposites are fabricated by room temperature pulsed laser synthesis method. Ag nanoparticles are prepared by laser deposition and subsequent laser annealing of silver thin film. Laser annealing of silver layer is performed at second and third harmonics of the Nd: YAG laser. The morphology of AgNPs differs significantly after the UV and VIS surface modification. The morphology and optical properties of the samples are studied according to the annealing regimes. A comparative study of the measured plasmon resonance properties with the theoretical calculations of the extinction efficiency by generalized multiparticle Mie (GMM) method is carried out. The extinction spectrum is determined as a function of the nanoparticles size distribution and the surrounding ZnO medium. The electromagnetic field intensity enhancement realized in the "hot spots" of AgNPs leads to substantial enhancement of the near band-edge UV photoluminescence (PL) emission of ZnO nanostructures and attenuation of the defect-related deep-level VIS PL signal after annealing at 355 nm and 532 nm.
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页数：6
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