Characterisation of nanostructures via terahertz spectroscopy by Parkinson, P, Joyce, H, Xu, X, Gao, Q, Tan, H, Jagadish, C, Herz, L, Johnston, M

“…We have used terahertz spectroscopy to measure the conductivity and time-resolved photoconductivity of a range of semiconducting nanostructures. …”

Polymer transistor performance monitored by terahertz spectroscopy by Lloyd-Hughes, J, Richards, T, Castro-Camus, E, Sirringhaus, H, Herz, L, Johnston, M

“…We show that terahertz spectroscopy is an ideal tool to probe polymer device performance. …”

Terahertz spectroscopy of semiconductor nanowires for device applications by Boland, J

“…From these measurements, the dopant activation energy in these nanowires is extracted for the first time via the terahertz spectroscopy, coinciding with literature values for the donors in bulk AlGaAs. …”

Polarization sensitive terahertz time domain spectroscopy by Castro-Camus, E, Lloyd-Hughes, J, Fraser, MD, Tan, H, Jagadish, C, Johnston, M

Terahertz spectroscopy of graphene and other two-dimensional materials by Docherty, C

“…</p> <p>Graphene grown by chemical vapour deposition (CVD) is studied using optical-pump THz-probe time domain spectroscopy in a variety of gaseous environments in Chapter 4. …”

Chapter 10: Pump-probe spectroscopy at terahertz frequencies by Johnston, M, Lloyd-Hughes, J

“…Optical-pump-terahertz-probe spectroscopy is a technique that can measure directly the conductivity of photoexcited carriers on a picosecond timescale. …”

Environment Induced Variation in the Photoconductivity of Graphene Observed By Terahertz Spectroscopy by Docherty, C, Lin, C, Joyce, H, Nicholas, R, Li, L, Johnston, M, IEEE

“…Chemical vapour deposition (CVD) grown graphene sheets were investigated using optical-pump terahertz-probe spectroscopy, revealing a dramatic variation in the photoinduced terahertz conductivity of graphene in different atmospheres. © 2012 IEEE.…”

Conformational changes of photoactive yellow protein monitored by terahertz spectroscopy by Castro-Camus, E, Johnston, M

“…Here we demonstrate that terahertz spectroscopy is a convenient probe of conformational changes in proteins suspended in physiological buffer solution. …”

Measuring the electrical properties of semiconductor nanowires using terahertz conductivity spectroscopy by Joyce, H, Docherty, C, Yong, C, Wong-Leung, J, Gao, Q, Paiman, S, Tan, H, Jagadish, C, Lloyd-Hughes, J, Herz, L, Johnston, M

“…OPTP spectroscopy has been used to assess key electrical properties, including carrier lifetime and carrier mobility, of GaAs, InAs and InP nanowires. …”

Conductivity of nanoporous InP membranes investigated using terahertz spectroscopy by Merchant, S, Lloyd-Hughes, J, Sirbu, L, Tiginyanu, I, Parkinson, P, Herz, L, Johnston, M

“…We examined the dynamical conductivity of photoexcited carriers using optical-pump THz-probe spectroscopy. After the rapid photoexcitation of electrons, the timeresolved conductivity was observed to decay slowly, with carrier recombination lifetimes exceeding 1 ns for all (100)- and (111)-oriented samples.…”

Conductivity of nanoporous InP membranes investigated using terahertz spectroscopy by Merchant, S, Lloyd-Hughes, J, Parkinson, P, Herz, L, Johnston, M, Sirbu, L, Tiginyanu, I

“…We report on extrinsic and photoexcited carrier behaviour in porous InP of various porosities and two orientations, studied using terahertz spectroscopy. We observed behaviour indicative of a surface electron depletion layer resulting from bandbending. ©2008 IEEE.…”

Conductivity of nanoporous InP membranes investigated using terahertz spectroscopy by Merchant, S, Lloyd-Hughes, J, Sirbu, L, Tiginyanu, I, Parkinson, P, Herz, L, Johnston, M, IEEE

“…We examined the dynamical conductivity of photoexcited carriers using optical-pump THz-probe spectroscopy. After the rapid photoexcitation of electrons, the time-resolved conductivity was observed to decay slowly, with carrier recombination lifetimes exceeding 1ns for all (100)- and (111)-oriented samples.…”

Conductivity of nanoporous InP membranes investigated using terahertz spectroscopy. by Merchant, S, Lloyd-Hughes, J, Sirbu, L, Tiginyanu, I, Parkinson, P, Herz, L, Johnston, M

An ion-implanted InP receiver for polarization resolved terahertz spectroscopy. by Castro-Camus, E, Lloyd-Hughes, J, Fu, L, Tan, H, Jagadish, C, Johnston, M

“…Additionally, we have demonstrated the usefulness of this device for (i) polarization sensitive terahertz spectroscopy, by measuring the birefringence of quartz and (ii) terahertz emission experiments, by measuring the polarization dependence of radiation generated by optical rectification in (110)-ZnTe.…”

Transient terahertz spectroscopy of mono- and tri-layer CVD-grown MoS 2 by Docherty, C, Joyce, H, Li, L, Johnston, M

“…Molybdenum disulpide, a novel two-dimensional semiconductor, was studied using optical-pump terahertz-probe spectroscopy. Mono and trilayer samples grown by chemical vapour deposition were compared to reveal their dynamic electrical response. © 2013 IEEE.…”

Transmission and emission terahertz time-domain spectroscopy with polarisation-sensitive photoconductive receivers by Castro-Camus, E, Lloyd-Hughes, J, Fu, L, Tan, H, Jagadish, C, Johnston, M

Electronic properties of GaAs, InAs and InP nanowires studied by terahertz spectroscopy. by Joyce, H, Docherty, C, Gao, Q, Tan, H, Jagadish, C, Lloyd-Hughes, J, Herz, L, Johnston, M

“…We have performed a comparative study of ultrafast charge carrier dynamics in a range of III-V nanowires using optical pump-terahertz probe spectroscopy. This versatile technique allows measurement of important parameters for device applications, including carrier lifetimes, surface recombination velocities, carrier mobilities and donor doping levels. …”

Exciton dissociation in polymer field-effect transistors studied using terahertz spectroscopy by Lloyd-Hughes, J, Richards, T, Sirringhaus, H, Johnston, M, Herz, L

“…We have used terahertz time-domain spectroscopy to investigate photoinduced charge generation in conjugated polymer field-effect transistors. …”

Transmission and emission terahertz time-domain spectroscopy with polarisation-sensitive photoconductive receivers by Castro-Camus, E, Lloyd-Hughes, J, Fu, L, Tan, H, Jagadish, C, Johnston, M, IEEE

Charge trapping in polymer transistors probed by terahertz spectroscopy and scanning probe potentiometry by Lloyd-Hughes, J, Richards, T, Sirringhaus, H, Castro-Camus, E, Herz, L, Johnston, M

“…Terahertz time-domain spectroscopy and scanning probe potentiometry were used to investigate charge trapping in polymer field-effect transistors fabricated on a silicon gate. …”