Terahertz radiation generation process in the medium based on the array of the elongated nanoparticles

• Published in: Optical and quantum electronics Vol. 54; no. 1
• Main Authors: Sadykov, N. R., Pilipenko, I. A., Jolnirov, S. E.
• Format: Journal Article
• Language: English
• Published: New York Springer US 2022; Springer Nature B.V
• Subjects: Arrays; Carbon dioxide; Carbon dioxide lasers; Characterization and Evaluation of Materials; Computer Communication Networks; Doppler effect; Electrical Engineering; Infrared radiation; Injection current; Lasers; Mathematical models; Nanoparticles; Nanoribbons; Nanotubes; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Radiation; Cascade lasers; Mathematical modeling; Array of metal nanoparticles; Terahertz radiation; Maxwell-Bloch equations
• ISSN: 0306-8919; 1572-817X
• DOI: 10.1007/s11082-021-03386-w

We conduct a theoretical study and numerical simulations of terahertz radiation generation in the medium based on armchair-edge nanoribbons and zigzag nanotubes with metallic conductivity. The multicascade mechanism of radiation generation is considered in the task of terahertz radiation generation. The level of the injection current in nanoparticle arrays has been estimated. The task expands to the similar medium where radiation current is generated with the use of infrared radiation stimulated absorption, for example, radiation of a CO 2 laser. For the effective dielectric function three basic models are employed: effective media approximation (Bruggeman’s theory) [nanotube bundles], Maxwell-Gatnett theory [ordered array], and Maxwell-Garnett theory with the Clausius–Mossotti geometric correction [ordered array of nanotubes].