Stretching-tunable diffractive elements based on single-walled carbon nanotubes for the terahertz frequency range
A.V.Radivon1,2,3, G.M.Katyba2,3, N.I.Raginov4, A.V.Chernykh5, M.I.Paukov1, G.A.Komandin2, K.I.Zaytsev2, Y.G.Gladush4, N.V.Petrov5,6, A.G.Nasibulin4, A.V.Arsenin1, D.V.Krasnikov4, M.G.Burdanova1,2
1Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Dolgoprudny, Russia;
2Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia;
3Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia;
4Skolkovo Institute of Science and Technology, Moscow, Russia;
5ITMO University, St. Petersburg, Russia;
6Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao, China
Abstract
In recent years, technologies operating in the terahertz (THz) frequency range have found increasing applications in areas such as medical diagnostics, security, microscopy, and next-generation communication systems. A key challenge for the further development of this field remains the lack of tunable devices controlled by an external stimulus. Creating such components requires materials that combine high electrical conductivity in the THz range, mechanical flexibility, and stability. Thin films of single-walled carbon nanotubes (SWCNTs) are a promising material meeting these requirements, possessing high conductivity, strength, and ultra-low thickness.
This work presents stretching-tunable diffractive elements based on SWCNT films, namely Fresnel zone plates and spiral zone plates. We demonstrate that mechanical stretching allows for dynamic control of the elements focal properties, specifically the focal length. The focusing performance of the fabricated lenses was investigated using terahertz imaging setup. Thus, the presented tunable elements pave the way for the development of compact and efficient THz beam steering systems, which will contribute to the enhancement of the component base and the expansion of practical applications of terahertz technology.
Speaker
Arina Vladimirovna Radivon
1 Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Dolgoprudny, Russia; 2 Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia; 3 Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Russia
Russia
Discussion
Ask question
