Numerical Analysis and Structure Optimization of Concentric GST Ring Resonator Mounted over SiO 2 Substrate and Cr Ground Layer

Khaled Aliqab (), Bo Bo Han, Ammar Armghan (), Meshari Alsharari, Jaymit Surve and Shobhit K. Patel
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Khaled Aliqab: Department of Electrical Engineering, College of Engineering, Jouf University, Sakaka 72388, Saudi Arabia
Bo Bo Han: Department of Information and Communication Technology, Marwadi University, Rajkot 360003, India
Ammar Armghan: Department of Electrical Engineering, College of Engineering, Jouf University, Sakaka 72388, Saudi Arabia
Meshari Alsharari: Department of Electrical Engineering, College of Engineering, Jouf University, Sakaka 72388, Saudi Arabia
Jaymit Surve: Department of Electrical Engineering, Marwadi University, Rajkot 360003, India
Shobhit K. Patel: Department of Computer Engineering, Marwadi University, Rajkot 360003, India

Mathematics, 2023, vol. 11, issue 5, 1-17

Abstract: Since the introduction of Metal-Insulator-Metal (MIM) absorbers, most of the structures demonstrated a narrowband absorption response which is not suitable for potential applications in photovoltaic systems, as it requires higher energy to enhance its performance. Very little research is being conducted in this direction; to address this issue, we exhibit a broadband solar absorber designed using a concentric GST ring resonator placed upon a silicon dioxide substrate layer with chromium used as a ground plane. It was analyzed using the finite element method. The design is also optimized by using a nonlinear parametric optimization algorithm. Comparatively less work has been focused on solar absorbers designed with the help of GST material, and here we have compared the effect of two different phases of GST, i.e., amorphous (aGST) and crystalline (cGST); the results indicate the higher performance of aGST phase. Parametric optimization has been adapted to identify the optimal design to attain high performance at minimal resources. The absorption response is angle insensitive for 0 to 60 degrees, and at the same time for both TE and TM modes, the design provides identical results, indicating the polarization-insensitive properties. The electric field intensity changes at the six peak wavelengths are also demonstrated for the authentication of the high performance. Thus, the proposed concentric GST ring resonator solar absorber can present a higher solar energy absorption rate than other solar structure designs. This design can be applied for improving the performance of photovoltaic systems.

Keywords: numerical analysis; structure optimization; parametric optimization; GST; chromium; SiO 2; Photovoltaic applications (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
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