Terahertz nonlinear optics of graphene: from saturable absorption to high‐harmonics generation

HA Hafez, S Kovalev, KJ Tielrooij… - Advanced Optical …, 2020 - Wiley Online Library
Graphene has long been predicted to show exceptional nonlinear optical properties,
especially in the technologically important terahertz (THz) frequency range. Recent …

Review of GaN-based devices for terahertz operation

K Ahi - Optical Engineering, 2017 - spiedigitallibrary.org
GaN provides the highest electron saturation velocity, breakdown voltage, operation
temperature, and thus the highest combined frequency-power performance among …

Quality control and authentication of packaged integrated circuits using enhanced-spatial-resolution terahertz time-domain spectroscopy and imaging

K Ahi, S Shahbazmohamadi, N Asadizanjani - Optics and Lasers in …, 2018 - Elsevier
In this paper, a comprehensive set of techniques for quality control and authentication of
packaged integrated circuits (IC) using terahertz (THz) time-domain spectroscopy (TDS) is …

Thermodynamic picture of ultrafast charge transport in graphene

Z Mics, KJ Tielrooij, K Parvez, SA Jensen… - Nature …, 2015 - nature.com
The outstanding charge transport properties of graphene enable numerous electronic
applications of this remarkable material, many of which are expected to operate at ultrahigh …

Mathematical modeling of THz point spread function and simulation of THz imaging systems

K Ahi - IEEE Transactions on Terahertz Science and …, 2017 - ieeexplore.ieee.org
This paper presents a comprehensive theory for cohesive mathematical modeling and
simulation of THz imaging systems. For mathematical modeling of the point spread function …

Terahertz spectroscopy of nanomaterials: a close look at charge‐carrier transport

P Kužel, H Němec - Advanced Optical Materials, 2020 - Wiley Online Library
Terahertz spectroscopy has been used for almost two decades for investigations of
nanomaterials, including nanocrystals, nanoparticles, nanowires, nanotubes or 2D crystals …

Terahertz-triggered phase transition and hysteresis narrowing in a nanoantenna patterned vanadium dioxide film

ZJ Thompson, A Stickel, YG Jeong, S Han, BH Son… - Nano …, 2015 - ACS Publications
We demonstrate that high-field terahertz (THz) pulses trigger transient insulator-to-metal
transition in a nanoantenna patterned vanadium dioxide thin film. THz transmission of …

Terahertz-induced high-order harmonic generation and nonlinear charge transport in graphene

W Mao, A Rubio, SA Sato - Physical Review B, 2022 - APS
We theoretically study the terahertz-induced high-order harmonic generation (HHG) and
nonlinear electric transport in graphene based on the quantum master equation with the …

Extended depth of field in continuous-wave terahertz computed tomography based on Bessel beam

D Wang, B Li, L Rong, Z Xu, Y Zhao, J Zhao… - Optics …, 2019 - Elsevier
Terahertz (THz) radiation is able to penetrate many different types of nonpolar and
nonmetallic materials. THz imaging can be combined with computed tomography (CT) to …

Terahertz electric field modulated mode coupling in graphene-metal hybrid metamaterials

S Li, PS Nugraha, X Su, X Chen, Q Yang… - Optics …, 2019 - opg.optica.org
Taking advantage of the tunable conductivity of graphene under high terahertz (THz) electric
field, a graphene-metal hybrid metamaterial consisting of an array of three adjoined …