Abstract
AbstractHigh-performance active terahertz modulators as the indispensable core components are of great importance for the next generation communication technology. However, they currently suffer from the tradeoff between modulation depth and speed. Here, we introduce two-dimensional (2D) tellurium (Te) nanofilms with the unique structure as a new class of optically controlled terahertz modulators and demonstrate their integrated heterojunctions can successfully improve the device performances to the optimal and applicable levels among the existing all-2D broadband modulators. Further photoresponse measurements confirm the significant impact of the stacking order. We first clarify the direction of the substrate-induced electric field through first-principles calculations and uncover the unusual interaction mechanism in the photoexcited carrier dynamics associated with the charge transfer and interlayer exciton recombination. This advances the fundamental and applicative research of Te nanomaterials in high-performance terahertz optoelectronics.
Funder
National Natural Science Foundation of China
Youth Innovation Promotion Association of the Chinese Academy of Sciences
Publisher
Springer Science and Business Media LLC
Reference48 articles.
1. Ferguson, B. & Zhang, X. C. Materials for terahertz science and technology. Nat. Mater. 1, 26–33 (2002).
2. Degl’Innocenti, R., Lin, H. & Navarro-Cía, M. Recent progress in terahertz metamaterial modulators. Nanophotonics 11, 1485–1514 (2022).
3. Harter, T. et al. Generalized Kramers–Kronig receiver for coherent terahertz communications. Nat. Photonics 14, 601–606 (2020).
4. Petrov, N. V. et al. Design of broadband terahertz vector and vortex beams: I. Review of materials and components. Light. Adv. Manuf. 3, 54 (2022).
5. Petrov, N. V. et al. Design of broadband terahertz vector and vortex beams: II. Holographic assessment. Light. Adv. Manuf. 3, 44 (2022).
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献