Localized surface plasmon enhanced deep UV-emitting of AlGaN based multi-quantum wells by Al nanoparticles on SiO2 dielectric interlayer

被引：16

作者：

He, Ju ^{[1
]}

Wang, Shuai ^{[1
]}

Chen, Jingwen ^{[1
]}

Wu, Feng ^{[1
]}

Dai, Jiangnan ^{[1
]}

Long, Hanling ^{[1
]}

Zhang, Yi ^{[1
]}

Zhang, Wei ^{[1
]}

Feng, Zhe Chuan ^{[2
]}

Zhang, Jun ^{[1
]}

Du, Shida ^{[1
]}

Ye, Lei ^{[3
]}

Chen, Changqing ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan, Hubei, Peoples R China

[2] Guangxi Univ, Coll Phys Sci & Technol, Guangxi Key Lab Relativist Astrophys, Lab Optoelect Mat & Detect Technol, Nanning, Peoples R China

[3] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan, Hubei, Peoples R China

来源：

NANOTECHNOLOGY | 2018年 / 29卷 / 19期

基金：

中国国家自然科学基金;

关键词：

local surface plasmon; AlGaN multi-quantum wells; deep ultraviolet emission; Al/SiO2 composite structure; MULTIPLE-QUANTUM-WELLS; EMISSION; ALUMINUM; EFFICIENCY; RESONANCE;

D O I：

10.1088/1361-6528/aab168

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this paper, we report a 2.6-fold deep ultraviolet emission enhancement of integrated photoluminescence (PL) intensity in AlGaN-based multi-quantum wells (MQWs) by introducing the coupling of local surface plasmons from Al nanoparticles (NPs) on a SiO2 dielectric interlayer with excitons and photons in MQWs at room temperature. In comparison to bare AlGaN MQWs, a significant 2.3-fold enhancement of the internal quantum efficiency, from 16% to 37%, as well as a 13% enhancement of photon extraction efficiency have been observed in the MQWs decorated with Al NPs on SiO2 dielectric interlayer. Polarization-dependent PL measurement showed that both the transverse electric and transverse magnetic mode were stronger than the original intensity in bare AlGaN MQWs, indicating a strong LSPs coupling process and vigorous scattering ability of the Al/SiO2 composite structure. These results were confirmed by the activation energy of non-radiative recombination from temperature-dependent PL measurement and the theoretical three dimensional finite difference time domain calculations.

引用

页数：7

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