Broadband perfect absorption in TMDC monolayers based on quasi-photonic crystal

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2022-03, Vol.128 (3), Article 207
• Main Authors: Ansari, Narges, Fallah, Kimya, Mohebbi, Ensiyeh
• Format: Article
• Language: English
• Subjects: Absorption; Applied physics; Broadband; Characterization and Evaluation of Materials; Condensed Matter Physics; Electro-optics; Machines; Manufacturing; Materials science; Matrix methods; Monolayers; Nanotechnology; Optical and Electronic Materials; Optical properties; Photonic crystals; Physics; Physics and Astronomy; Processes; Silicon dioxide; Surfaces and Interfaces; Thin Films; Transfer matrices; Transition metal compounds
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-022-05354-x

Nowadays, transition-metal dichalcogenides (TMDCs) are supposed to be a platform for improving the electro-optical properties, which can fit in different structures in order to upgrade their absorption. In this paper, TMDC monolayers are placed in various quasi-photonic crystals (QPCs) such as Thue-Morse, Double-Periodic, Rudin-Shapiro, and Octonacci to increase absorption. SiO 2 , Si 3 N 4 , and TMDC monolayers (MoS 2 , MoSe 2 , WS 2 , and WSe 2 ) are included in QPCs. The transfer matrix method is used to calculate optical properties in the visible wavelength. To design a structure with high absorption in a wide range of wavelengths, the periodicity, generation number, and different types of QPCs are examined. According to results, absorption of Thue-Morse QPC is higher than 75% in wide-broadband wavelength (400–675 nm) and Rudin-Shapiro QPC outcome perfect absorption in the range of 430–550 nm. Wide-broadband absorption and perfect absorption at a broad angle procedure have opened a new horizon for electro-optics applications.