Abstract

Pulse shaping is important for communications, spectroscopy, and other applications that require high peak power and pulsed operation, such as radar systems. Unfortunately, pulse shaping remains largely elusive for terahertz (THz) frequencies. To address this void, a comprehensive study on the dispersion tunability properties of THz chirped pulses traveling through a dielectric-lined hollow-core waveguide loaded with a helical graphene ribbon is presented. It is demonstrated that there is an optimal compression waveguide length over which THz chirped pulses reach the maximum compression. The optimal length is dependent on the chirp pulse duration. It is shown that by applying an electrostatic controlling gate voltage (${V_g}$) of 0 and 30 V on the helical graphene ribbon, the temporal input pulses of width 8 and 12 ps, propagating through two different lengths, can be tuned by 5.9% and 8%, respectively, in the frequency range of 2.15–2.28 THz.

© 2020 Optical Society of America

Actively tunable graphene ribbon based multi-band THz polarizer with a high extinction ratio

Anjali, R. K. Varshney, and Sunil Kumar
J. Opt. Soc. Am. B 40(7) 1688-1695 (2023)

Tunable plasmon-induced transparency with a dielectric grating-coupled graphene structure for slowing terahertz waves

Tianzhi Wang, Fei Yan, Ruoxing Wang, Fengjun Tian, and Li Li
Appl. Opt. 59(24) 7179-7185 (2020)

Graphene-based multifunctional three-port THz and long-wave infrared components

Victor Dmitriev, Geraldo Melo, and Wagner Castro
Appl. Opt. 59(17) E65-E71 (2020)

Dynamically tunable reflecting near-infrared bandpass filter based on a hybrid graphene–nanometallic structure

Seyed Edriss Mirnia and Brian A. Lail
Appl. Opt. 59(18) 5608-5614 (2020)

Investigation of plasmonic properties of graphene multilayer nano-ribbon waveguides

Morteza Hajati and Yaser Hajati
Appl. Opt. 55(8) 1878-1884 (2016)