Broadband Optical and Terahertz Properties of Atomically Thin 1D van der Waals Heterostructures
Maria Burdanova
Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology,
Dolgoprudny, Russia
Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka,
Russia
Abstract
Van der Waals (VdW) heterostructures built of atomically thin 2D material crystals exhibit unique optical and electronic properties. Here, we present a complete study of optical properties of novel 1D van der Waals heterostructures comprising carbon nanotubes (CNT) wrapped by atomically thin nanotubes of boron nitride (BN) and molybdenum disulfide (MoS2NT). The ellipsometry measurements allowed us to retrieve of dielectric functions and the excitonic properties of such a material. The extinction peaks appear at a slightly lower wavelength compared with the excitons in the absorption curve. This could provide the evidence of the coupling effect in hollow nanotubes. In addition, the charge carrier effect which is evident from XPS measurement results in the change of the THz conductivity spectra. The study of this work provides guidance for the design of 1D van der Waals heterostructures for use in nanoscale optoelectronic devices.
Acknowledgment: The reported study was funded by RSF project number 21-79-10097.
Speaker
Burdanova Maria
Московский физико-технический институт
Russia
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