Review of terahertz pulsed imaging for pharmaceutical film coating analysis

D Alves-Lima, J Song, X Li, A Portieri, Y Shen… - Sensors, 2020 - mdpi.com
Terahertz pulsed imaging (TPI) was introduced approximately fifteen years ago and has
attracted a lot of interest in the pharmaceutical industry as a fast, non-destructive modality for …

Sub-diffraction thin-film sensing with planar terahertz metamaterials

W Withayachumnankul, H Lin, K Serita, CM Shah… - Optics express, 2012 - opg.optica.org
Planar metamaterials consisting of subwavelength resonators have been recently proposed
for thin dielectric film sensing in the terahertz frequency range. Although the thickness of the …

[HTML][HTML] Through-substrate terahertz time-domain reflection spectroscopy for environmental graphene conductivity mapping

H Lin, OJ Burton, S Engelbrecht, KH Tybussek… - Applied Physics …, 2020 - pubs.aip.org
We demonstrate how terahertz time-domain spectroscopy (THz-TDS) operating in reflection
geometry can be used for quantitative conductivity mapping of large area chemical vapor …

Exact Reconstruction of THz Sub- Source Features in Knife-Edge Measurements

M Peccianti, M Clerici, A Pasquazi… - IEEE Journal of …, 2012 - ieeexplore.ieee.org
The spatial features of a subwavelength terahertz source are not accessible using time-
integrated knife-edge (KE) techniques due to the nonseparable space-time nature of the …

Distributed source model for the full-wave electromagnetic simulation of nonlinear terahertz generation

C Fumeaux, H Lin, K Serita, W Withayachumnankul… - Optics …, 2012 - opg.optica.org
The process of terahertz generation through optical rectification in a nonlinear crystal is
modeled using discretized equivalent current sources. The equivalent terahertz sources are …

Accurate measurement of a THz beam radius through a knife-edge technique with a photoconductive antenna detector

O Morikawa, A Hattori, K Yamamoto, K Kurihara… - JOSA B, 2024 - opg.optica.org
In a terahertz (THz) time-domain spectroscopic system, the THz beam waist radius can be
measured by eclipsing the beam waist with a semi-infinite mask while monitoring signal …

Radiating pattern of surge-current-induced THz light in near-field and far-field zone

JW Han, YG Choi, JS Lee - Scientific Reports, 2018 - nature.com
We generate the THz wave on the surface of an unbiased GaAs crystal by illuminating
femtosecond laser pulses with a 45° incidence angle, and investigate its propagation …

Characteristics of the partially reflected terahertz wave: truncated beam propagation

JW Han, YG Choi, JS Lee - JOSA B, 2019 - opg.optica.org
We investigate a free-space propagation of a truncated terahertz beam created as a result of
a partial reflection from a small-sized metallic reflector. By using terahertz time-domain …

Novel Techniques and Instrumentation for Material Characterization from Microwave to THz Frequencies

M Tuo - 2018 - search.proquest.com
This dissertation focuses on the investigation of microwave and terahertz (THz)
nanomaterials, devices, components and systems. The work done in this dissertation is …

Environmental graphene conductivity sensing using terahertz time-domain reflection spectroscopy

H Lin, OJ Burton, S Engelbrecht… - … Waves (IRMMW-THz …, 2020 - ieeexplore.ieee.org
We demonstrate how reflection terahertz time-domain spectroscopy (THz-TDS) can be used
to measure conductivity of large area graphene films through silicon substrate. This through …