International Journal of Terahertz Science and Technology
Vol.13, No.4, December 2020. PP.119-148(2)
date2020-12-31 13:26:47 Click No.344

TST, Vol. 13, No. 4, PP. 119-134

(Invited paper) Fano resonances in the corrugated disk resonator and their applications

Lin Chen 1, 2, Bo Liu 1, and Yiming Zhu 1*, 2
1 Shanghai Key Lab of Modern Optical System, University of shanghai for Science and Technology, Shanghai, China
2 Cooperative Innovation Centre of Terahertz Science, University of Electronic Science Chengdu, China
*1 Email:
ymzhu@usst.edu.cn

(Received December 26, 2017)

Abstract: We have experimentally excited terahertz multipolar Fano resonances in two asymmetrical metal particles: a defective corrugated metallic disk(CMD) structure and a hybrid structure consisted of a C-shaped resonator and a CMD. Furthermore, the Fano resonance modes can also be excited by the interaction between plasmonic waveguide and CMD. Our findings have shed light into the terahertz multipolar Fano resonances in asymmetrical CMD and opened the way to the design of terahertz plasmonic devices.

Keywords: Terahertz, Fano resonances, Corrugated metallic disk

doi:

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TST, Vol. 13, No. 4, PP. 135-148

(Invited paper) Ultrafast carrier dynamics in graphene and graphene nanostructures

Dmitry Turchinovich 1*, Zoltan Mics 1, Søren A. Jensen 1, Klaas-Jan Tielrooij 1, 2, Ivan Ivanov 1, Khaled Parvez 1, Akimitsu Narita 1, Tobias Hertel 3, Frank Koppens 2, Xinliang Feng 1, Klaus M┨llen 1, and Mischa Bonn 1
1 Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
2 ICFO C Institut de Ciencies Fotoniques, Mediterranean Technology Park, Castelldefels, Barcelona, 08860 Spain
3 Institute of Physical and Theoretical Chemistry, Julius-Maximilian University, 97070 W┨rzburg, Germany
*1 Email:
turchino@mpip-mainz.mpg.de

(Received December 14, 2015)

Abstract: In this paper we provide a comprehensive view on the ultrafast conduction dynamics in graphene and graphene nanostructures. We show that ultrafast conduction in graphene can be well understood within a simple thermodynamic picture, by taking into account the dynamical interplay between electron heating and cooling, with the driving electric field acting as a supplier of thermal energy to graphene electron population. At the same time, the conductive properties of graphene nanostructures, such as graphene nanoribbons (GNRs) and carbon nanotubes (CNTs), can be well explained within the concept typical for disordered materials, such as e.g. organic semiconductors - the conduction by the free charge experiencing long-range localization.

Keywords: Terahertz spectroscopy, Graphene, Nanostructures, Conductivity, Charge transport properties.

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