Optimization of Light Absorption and Backscattering Characteristics of Au-Ag Alloy Nanoshells

Panpan Wu; Paerhatijiang Tuersun; Remilai Abulaiti; Yuxia Zheng

doi:10.3788/AOS202141.1129001

Acta Optica Sinica, Volume. 41, Issue 11, 1129001(2021)

Optimization of Light Absorption and Backscattering Characteristics of Au-Ag Alloy Nanoshells

Panpan Wu^1,2, Paerhatijiang Tuersun^1,2、*, Remilai Abulaiti^1,2, and Yuxia Zheng^1,2

Author Affiliations

¹School of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi, Xinjiang 830054, China

²Laboratory of Novel Light Source and Micro/Nano-Optics, Xinjiang Normal University, Urumqi, Xinjiang 830054, China

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Figures & Tables(12)

Fig. 1. Geometric model of the Au-Ag alloy nanoshell

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Fig. 2. Change curve of α_abs. (a) Change curve with R₁; (b) change curve with t; (c) change curve with x

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Fig. 3. α_abs changes with the size (800 nm). (a) Inner core is SiO₂; (b) inner core is vacuum

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Fig. 4. Effect of x on optimized parameters of Au-Ag alloy nanoshells. (a) α_abs,max; (b) R_1,opt; (c) t_opt

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Fig. 5. Effect of n_m on optimized parameters of Au-Ag alloy nanoshells. (a) α_abs,max; (b) R_1,opt; (c) t_opt

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Fig. 6. Change curve of α_back. (a) Change curve with R₁; (b) change curve with t; (c) change curve with x (n_m=1.44)

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Fig. 7. α_back of Au-Ag alloy nanoshells change with the size (λ=830 nm). (a) Inner core is SiO₂; (b) inner core is vacuum

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Fig. 8. Effect of x on optimized parameters of Au-Ag alloy nanoshells. (a) α_back,max; (b) R_1,opt; (c) t_opt(λ=830 nm, n_m=1.44)

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Fig. 9. Effect of n_m on optimized parameters of Au-Ag alloy nanoshells. (a) α_back,max; (b) R_1,opt; (c) t_opt(λ=830 nm, x=50%)

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Table 1. Fitting parameters of the dielectric function of Au-Ag alloy^[29]

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Table 1. Fitting parameters of the dielectric function of Au-Ag alloy^[29]

Metal	ω_p/eV	Γ_p/eV	ε_∞	ω_g1/eV	ω₀₁/eV	Γ₁/eV	A₁	ω₀₂/eV	Γ₂/eV	A₂
Au	8.9234	0.042389	2.2715	2.6652	2.3957	0.1788	73.251	3.5362	0.35467	40.007
AuAg5050	9.0218	0.16713	2.2838	3.0209	2.7976	0.18833	22.996	3.3400	0.68309	57.540
Ag	8.5546	0.022427	1.7381	4.0575	3.9260	0.017723	51.217	4.1655	0.18819	30.770

Table 2. Optimum parameters of Au-Ag alloy nanoshells at 4 typical excitation wavelengths
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Table 2. Optimum parameters of Au-Ag alloy nanoshells at 4 typical excitation wavelengths
Core λ /nm α_abs,max /μm^-1 R_1,opt /nm t_opt /nm
800 93.660 27.89 3.95
808 91.880 28.36 3.92
SiO₂ 820 89.293 29.03 3.87
1064 53.169 43.72 3.29
800 99.316 28.02 3.35
808 97.426 28.45 3.32
Vacuum 820 94.679 29.12 3.28
1064 56.505 43.15 2.78

Table 3. α_back,max, R_1,opt and t_opt of Au-Ag alloy nanoshells at 4 typical excitation wavelengths
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Table 3. α_back,max, R_1,opt and t_opt of Au-Ag alloy nanoshells at 4 typical excitation wavelengths
Core λ /nm α_back,max /μm^-1 R_1,opt /nm t_opt /nm
830 5.280 56.08 10.47
840 5.169 57.18 10.38
SiO₂ 900 4.562 63.73 9.91
1310 2.281 109.22 8.95
830 5.550 56.37 8.89
840 5.430 57.44 8.81
Vacuum 900 4.785 63.89 8.42
1310 2.357 108.82 7.63

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Panpan Wu, Paerhatijiang Tuersun, Remilai Abulaiti, Yuxia Zheng. Optimization of Light Absorption and Backscattering Characteristics of Au-Ag Alloy Nanoshells[J]. Acta Optica Sinica, 2021, 41(11): 1129001

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Paper Information

Category: Scattering

Received: Dec. 7, 2020

Accepted: Jan. 8, 2021

Published Online: Jun. 7, 2021

The Author Email: Tuersun Paerhatijiang (ptuersun@163.com)

DOI:10.3788/AOS202141.1129001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Fitting parameters of the dielectric function of Au-Ag alloy[29]

Table 1. Fitting parameters of the dielectric function of Au-Ag alloy[29]

Table 2. Optimum parameters of Au-Ag alloy nanoshells at 4 typical excitation wavelengths

Table 2. Optimum parameters of Au-Ag alloy nanoshells at 4 typical excitation wavelengths

Table 3. αback,max, R1,opt and topt of Au-Ag alloy nanoshells at 4 typical excitation wavelengths

Table 3. αback,max, R1,opt and topt of Au-Ag alloy nanoshells at 4 typical excitation wavelengths

Table 1. Fitting parameters of the dielectric function of Au-Ag alloy^[29]

Table 1. Fitting parameters of the dielectric function of Au-Ag alloy^[29]

Table 3. α_back,max, R_1,opt and t_opt of Au-Ag alloy nanoshells at 4 typical excitation wavelengths

Table 3. α_back,max, R_1,opt and t_opt of Au-Ag alloy nanoshells at 4 typical excitation wavelengths