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 …

[HTML][HTML] Terahertz spectral analysis: An in-depth exploration of spectroscopy approaches for ultrafast dynamics

J Jang, J Park, HJ Shin - Current Applied Physics, 2024 - Elsevier
Terahertz (THz) radiation, located on the electromagnetic spectrum between microwaves
and infrared, gives significant interest due to its remarkable potential in various applications …

Topological resonance and single-optical-cycle valley polarization in gapped graphene

SA Oliaei Motlagh, F Nematollahi, V Apalkov… - Physical Review B, 2019 - APS
For gapped graphene, we predict that an intense ultrashort (single-oscillation) circularly
polarized optical pulse can induce a large population of the conduction band and a large …

Ultrafast optical currents in gapped graphene

SAO Motlagh, F Nematollahi, A Mitra… - Journal of Physics …, 2019 - iopscience.iop.org
We theoretically study the interaction of ultrashort optical pulses with gapped graphene.
Such a strong pulse results in a finite conduction band population and a corresponding …

Impact ionization and intervalley electron scattering in InSb and InAs induced by a single terahertz pulse

S Ašmontas, S Bumelienė, J Gradauskas… - Scientific Reports, 2020 - nature.com
Electronic properties of InSb and InAs are sensitive to electric field due to their narrow
forbidden energy gaps and big difference in effective masses of electrons in different …

Transition metal dichalcogenide monolayers in an ultrashort optical pulse: Femtosecond currents and anisotropic electron dynamics

SA Oliaei Motlagh, V Apalkov, MI Stockman - Physical Review B, 2021 - APS
We theoretically study the interaction of an ultrafast intense linearly polarized optical pulse
with monolayers of transition metal dichalcogenides (TMDCs). Such a strong pulse …

Hydrostatic pressure effect of photocarrier dynamics in GaAs probed by time-resolved terahertz spectroscopy

S Xu, D Huang, Z Liu, K Zhang, H Jiang, H Gou… - Optics …, 2021 - opg.optica.org
Pressure effects on photocarrier dynamics such as interband relaxations and intraband
cooling in GaAs have been investigated using in situ time-resolved terahertz spectroscopy …

Ultrafast strong-field absorption in gapped graphene

SA Oliaei Motlagh, AJ Zafar, A Mitra, V Apalkov… - Physical Review B, 2020 - APS
We study theoretically the strong-field absorption of an ultrafast optical pulse by a gapped
graphene monolayer. At low field amplitudes, the absorbance in pristine graphene is equal …

Transient Terahertz Spectroscopy for 2D Materials

J Xu, K Zhang, H Li, T Wang - Two‐Dimensional Materials for …, 2024 - Wiley Online Library
Time‐resolved, pulsed terahertz (THz) spectroscopy emerged as a powerful tool for
investigating the electronic and optical properties of two‐dimensional (2D) materials over …

Quasi-monochromatic THz pulse generation using Cherenkov radiation from a spatially modulated electron beam

Y Tadenuma, T Murakami, M Brameld… - Journal of …, 2020 - iopscience.iop.org
Cherenkov radiation forms a wave front in a direction that depends on the density of the
medium and the velocity of charged particles; therefore, ordinary electron bunches do not …