An Innovative Polarisation-Insensitive Perfect Metamaterial Absorber with an Octagonal-Shaped Resonator for Energy Harvesting at Visible Spectra

Abstract

Perfect metamaterial absorber (PMA) is an attractive optical wavelength absorber with potential solar energy and photovoltaic applications. Perfect metamaterials used as solar cells can improve efficiency by amplifying incident solar waves on the PMA. This study aims to assess a wide-band octagonal PMA for a visible wavelength spectrum. The proposed PMA consists of three layers: nickel, silicon dioxide, and nickel. Based on the simulations, polarisation-insensitive absorption transverse electric (TE) and transverse magnetic (TM) modes were achieved due to symmetry. The proposed PMA structure was subjected to computational simulation using a FIT-based CST simulator. The design structure was again confirmed using FEM-based HFSS to maintain pattern integrity and absorption analysis. The absorption rates of the absorber were estimated at 99.987% and 99.997% for 549.20 THz and 653.2 THz, respectively. The results indicated that the PMA could achieve high absorption peaks in TE and TM modes despite being insensitive to polarisation and the incident angle. Electric field and magnetic field analyses were performed to understand the absorption of the PMA for solar energy harvesting. In conclusion, the PMA possesses outstanding visible frequency absorption, making it a promising option.

Simulation and Analysis of a Near-Perfect Solar Absorber Based on SiO2-Ti Cascade Optical Cavity

“…With the large amounts of fossil fuels being consumed, research into diverse energy sources for the future has led to extensive research around the globe, with photovoltaic absorption technology developing extremely fast [1][2][3][4]. Eternal, clean solar energy could be a good substitute for traditional energy sources to solve the growing energy needs of mankind [5,6]. Nowadays, solar energy has been applied in the field of desalination, greenhouse gas reduction, and energy conversion [7][8][9][10] and has a very promising future.…”

Design and performance evaluation of a novel broadband THz modulator based on graphene metamaterial for emerging applications

“…Terahertz absorbers have received widespread attention in the fields of imaging (Sung et al, 2018), sensing (Wu et al, 2021) and stealth (Cheng et al, 2020). In practical applications, once a traditional terahertz absorber is manufactured, its structural size is fixed and it can only absorb terahertz waves of a specific frequency (Huang et al, 2021;Hossain et al, 2023). Therefore, it is particularly important to design a tunable highperformance terahertz absorber.…”

Editorial of the Special Issue ‘Nano-Optics and Nano-Optoelectronics: Challenges and Future Trends’

“…To explore the latest developments and challenges and the future trends in nano-optics and nano-optoelectronics, this Special Issue compiles sixteen papers dedicated to very recent advances in nanostructures and nanomaterials. In these papers, novel nanostructures and nanomaterials, such as metastructures [ 1 , 2 , 3 ], metalenses [ 4 , 5 ], nanoparticles [ 6 , 7 ], layered 2D materials [ 8 , 9 ], and nano-semiconductors [ 10 , 11 ], are presented in detail. Due to their exceptional properties, these nanostructures/nanomaterials offer a diverse range of novel applications in photodetectors [ 1 , 9 , 11 ], solar cells [ 2 , 9 , 10 ], modulators [ 1 , 3 , 8 ], light emitters [ 1 , 7 ], optoelectronic integration [ 5 , 6 ], super-resolved imaging [ 4 , 5 ], nanofabrication [ 4 ], etc.…”

“…In these papers, novel nanostructures and nanomaterials, such as metastructures [ 1 , 2 , 3 ], metalenses [ 4 , 5 ], nanoparticles [ 6 , 7 ], layered 2D materials [ 8 , 9 ], and nano-semiconductors [ 10 , 11 ], are presented in detail. Due to their exceptional properties, these nanostructures/nanomaterials offer a diverse range of novel applications in photodetectors [ 1 , 9 , 11 ], solar cells [ 2 , 9 , 10 ], modulators [ 1 , 3 , 8 ], light emitters [ 1 , 7 ], optoelectronic integration [ 5 , 6 ], super-resolved imaging [ 4 , 5 ], nanofabrication [ 4 ], etc. This Special Issue also encompasses the latest advancements in practical nano-optical and nano-optoelectronic technologies, such as femtosecond laser nano-processing [ 12 ], atomic layer coating [ 13 ], and new designs for photonic integration engineering [ 14 ].…”

“…The proposed structure exhibits remarkable sensitivity for tuning and other high-performance indicators, meaning that it could potentially be utilized in tunable displays, light detection and ranging (LiDAR), and spatial light modulators (SLMs). Hossain et al [ 2 ] aimed to evaluate the performance of a wide-band octagonal perfect metamaterial absorber (PMA) for the visible wavelength spectrum. The proposed PMA exhibits remarkable absorption in both TE and TM modes and insensitivity to polarization and incident angles.…”