Revisiting the Optical Dispersion of Aluminum-Doped Zinc Oxide: New Perspectives for Plasmonics and Metamaterials

被引:20
作者
Shabani, Alireza [1 ]
Nezhad, Mehdi Khazaei [2 ]
Rahmani, Neda [1 ]
Mishra, Yogendra Kumar [4 ]
Sanyal, Biplab [3 ]
Adam, Jost [1 ]
机构
[1] Univ Southern Denmark, Dept Mech & Elect Engn, DK-6400 Sonderborg, Denmark
[2] Ferdowsi Univ Mashhad, Fac Sci, Dept Phys, Mashhad 9177948974, Razavi Khorasan, Iran
[3] Uppsala Univ, Dept Phys & Astron, Box 516, S-75120 Uppsala, Sweden
[4] Univ Southern Denmark, Mads Clausen Inst, NanoSYD, DK-6400 Sonderborg, Denmark
来源
ADVANCED PHOTONICS RESEARCH | 2021年 / 2卷 / 04期
关键词
Al-doped ZnO; density function theory; finite-difference time domains; Hubbard correction; plasmonics; split-ring resonators; transparent conducting oxides;
D O I
10.1002/adpr.202000086
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Due to the high rate of optical losses and the extensive usage of noble metals, alternative plasmonic materials with maximum tunability and low loss are desired for future plasmonic and metamaterial devices and applications. Herein, the potential of aluminum-doped zinc oxide (AZO), one of the most prominent members of the transparent conducting oxide family, is demonstrated, for its applicability in plasmonic metamaterials. Using first-principles density functional theory, combined with optical calculations, AZO-based, plasmonic split-ring resonators (SRRs) as model examples are showcased. The results match with experimental reports for the optical dielectric functions of pure and 2.08% Al-doped zinc oxide (ZnO), if the Hubbard model to the local density approximation is applied. The broadband optical dispersion data for varying dopant concentrations (0%, 2.08%, and 6.25%) are extracted and provided. The subsequent optical response analyses show the existence of pronounced plasmons and inductor-capacitor modes in Al-doped ZnO SRRs and an enhancement in metallic characteristics and plasmonic performance of AZO upon increasing Al concentration. The findings predict AZO as a low-loss plasmonic material with promising capability for enhancing future optoelectronics applications. The method introduces a new, versatile approach to design future optical materials of arbitrary geometry.
引用
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页数:10
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