Tunable dual‐band filter based on monolayer black phosphorus. Issue 7 (9th April 2022)

• Record Type: Journal Article
• Authors: Oliveira, Cristiano; Dmitriev, Victor; Melo, Geraldo; Castro, Wagner
• Is Part Of: Microwave and optical technology letters. Volume 64:Issue 7(2022)
• Page Start: 1170
• Page End: 1175
• Publication Date: 2022-04-09
• Subjects: black phosphorus -- dual‐band filter -- dynamic control -- polarization -- temporal coupled‐mode theory; Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.33262
• Languages: English
• ISSNs: 0895-2477

Abstract

Abstract: We propose analytical and numerical modeling of a tunable electromagnetic dual‐band filter based on a periodic structure of black phosphorus (BP) discs deposited on silicon dioxide for operating in terahertz and infrared regions. Due to BP anisotropy, single operation dipole mode bands for polarization of incident wave in the armchair or zigzag directions exist. These bands correspond to different resonant frequencies. However, for another polarization, in particular, for a 4 5 ∘ $4{5}^{\circ }$ polarization, a double operation band appears. The dynamic control of the proposed structure can be performed by varying the electronic doping of the BP, thus changing the operating frequency of the filter. The analytical model based on the temporal coupled‐mode theory is in good agreement with the numerical simulations by COMSOL Multiphysics.