Plasmon-exciton interaction and screening of exciton in ZnO-based thin film on bulk Pt as analyzed by spectroscopic ellipsometry

被引：16
|
作者：
Darma, Yudi [1 ]
Satrya, Christoforus Dimas [1 ]
Marlina, Resti [1 ]
Kurniawan, Robi [1 ]
Herng, Tun Seng [2 ,4 ]
Ding, Jun [4 ]
Rusydi, Andrivo [2 ,3 ]
机构：
[1] Inst Tekn Bandung, Dept Phys, Ganesa 10, Bandung 40132, Indonesia
[2] Natl Univ Singapore, Singapore Synchrotron Light Source, 5 Res Link, Singapore 117603, Singapore
[3] Natl Univ Singapore, NUSNNI Nanocore, Dept Phys, 2 Sci Dr 3, Singapore 117542, Singapore
[4] Natl Univ Singapore, Dept Mat Sci & Engn, 7 Engn Dr 1, Singapore 117574, Singapore
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2017年 / 56卷 / 01期
基金：
新加坡国家研究基金会;
关键词：
ULTRATHIN AU FILMS; SURFACE-PLASMON; PLATINUM NANOPARTICLES; MULTIQUANTUM WELLS; OPTICAL-PROPERTIES; ROOM-TEMPERATURE; RESONANCE; EMISSION; NANOSTRUCTURES; ENHANCEMENT;
D O I：
10.7567/JJAP.56.01AD06
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study plasmon-exciton interaction in ZnO-based thin film on bulk Pt by using high resolution spectroscopic ellipsometry. ZnO films on quartz are used as reference. This study shows the strong electronic interactions between ZnO film and Pt by considering the significant suppression of exciton in ZnO film, in comparison to ZnO film on quartz. We found that plasmon in Pt are responsible to provide transferred electron for electronic blocking of exciton in ZnO film induce by spontaneous recombination from Pt. In the case of Cu doped ZnO film, we confirm screening effects on exciton and a localized interband transition for both systems (ZnO film on Pt and ZnO film on quartz). In Cu-doped ZnO film, electronic blocking of exciton by Pt plasmon is more pronounce rather than screening effect by interband transition. Our results show the importance of plasmon from substrate and doping to modify the optical properties of wide bandgap semiconductor. (C) 2017 The Japan Society of Applied Physics
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页数：5
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