High Absorptivity Solar Absorber Based on MIM Resonant Structure

Gongli Xiao; Kang Chen; Hongyan Yang; Jiarong Zhang; Miao Li; Xingpeng Liu; Zanhui Chen

doi:10.3788/AOS231934

Acta Optica Sinica, Volume. 44, Issue 9, 0924001(2024)

High Absorptivity Solar Absorber Based on MIM Resonant Structure

Gongli Xiao¹, Kang Chen¹, Hongyan Yang^2、*, Jiarong Zhang¹, Miao Li¹, Xingpeng Liu¹, and Zanhui Chen¹

¹Key Laboratory of Microelectronic Devices and Integrated Circuits of Guangxi Colleges, School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, Guangxi, China

²School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, Guangxi, China

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Figures & Tables(9)

Fig. 1. Solar absorber designed in this paper. (a) Overall structural view; (b) top view of structure; (c) main view of structure

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Fig. 2. Relationship between dielectric constant of material used in structure and wavelength. (a) Dielectric function of GeAs; (b) dielectric function of A-GST; (c) dielectric function of W; (d) dielectric function of Ti

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Fig. 3. Spectral and radiation characteristics of designed solar absorber. (a) Absorptivity, reflectivity, and transmissivity of solar absorber under normal incidence conditions; (b) solar absorption and loss spectra under $A M 1.5$ ; (c) thermal radiation effect at T=2000 K; (d) effective thermal emissivity from 300 K to 2000 K

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Fig. 4. Relationship between three main parameters of solar absorber and wavelength. (a) Phase parameter χ and extinction coefficient $κ_{e f f}$ ; (b) effective impedance $Z_{e f f}$

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Fig. 5. Distributions of x-zplane magnetic field and y-zplane electric field for different modes

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Fig. 6. Influence of number of structural layers and material combinations on performance of absorber. (a) Variation of absorption with number of structural layers and material combination; (b) influence of material combination on absorber performance in three-layer structures

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Fig. 7. Effect of angle of incidence on absorptivity

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Table 1. Optimized geometric parameters
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Table 1. Optimized geometric parameters
Geometric parameter /μm d₁ d₂ d₃ d₄ h₁ or h₂ h₃ P_x P_y
Value 0.025 0.5d₄ 0.75d₄ 0.44 0.08 0.5 0.5 0.5

Table 2. Comparison of this study with work in recent years

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Table 2. Comparison of this study with work in recent years

Reference	Work wavelength /μm	Average absorptivity /%	Solar spectral weighted absorption efficiency /%
Ref.［55］	0.3-2.4	-	96.7
Ref.［56］	0.3-3	-	>90
Ref.［57］	0.288-2.16	96.56	95.89
Ref.［61］	0.4-2	97.9	-
Ref.［62］	0.4-2.5	90.4	-
This work	0.3-2.5	97.48	98.02
This work	0.3-4	96.95	97.54

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Gongli Xiao, Kang Chen, Hongyan Yang, Jiarong Zhang, Miao Li, Xingpeng Liu, Zanhui Chen. High Absorptivity Solar Absorber Based on MIM Resonant Structure[J]. Acta Optica Sinica, 2024, 44(9): 0924001

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