504 citations · 1.1k across the 7 of their papers we have counts for
7 papers
Total internal reflection based super-resolution imaging for sub-IR frequencies
Lauren E. Barr, Peter Karlsen, Samuel M. Hornett +5
For measurements designed to accurately determine layer thickness, there is a natural trade-off between sensitivity to optical thickness and lateral resolution due to the angular r…
Impact of pump wavelength on terahertz emission of a cavity-enhanced spintronic trilayer
Rosamund I. Herapath, Sam M. Hornett, T. Seifert +5
We systematically study the pump-wavelength dependence of terahertz pulse generation in thin-film spintronic THz emitters composed of a ferromagnetic Fe layer between adjacent nonm…
The ultrafast dynamics and conductivity of photoexcited graphene at different Fermi energies
A. Tomadin, S. M. Hornett, H. I. Wang +10
For many of the envisioned optoelectronic applications of graphene it is crucial to understand the sub-picosecond carrier dynamics immediately following photoexcitation, as well as…
Subwavelength THz imaging of graphene photoconductivity
Samuel M. Hornett, Rayko I. Stantchev, Martha Z. Vardaki +2
Using a spatially structured, optical pump pulse with a THz probe pulse, we are able to determine spatial variations of the ultrafast THz photoconductivity with sub-wavelength reso…
Non-invasive, near-field terahertz imaging of hidden objects using a single pixel detector
R. I. Stantchev, B. Sun, S. M. Hornett +4
Terahertz (THz) imaging has the ability to see through otherwise opaque materials. However, due to the long wavelengths of THz radiation (λ=300μm at 1THz), far-field THz imaging te…
All-Optical Generation of Surface Plasmons in Graphene
Thomas J. Constant, Samuel M. Hornett, Darrick E. Chang +1
Here we present an all-optical plasmon coupling scheme, utilising the intrinsic nonlinear optical response of graphene. We demonstrate coupling of free-space, visible light pulses…
Hot phonon decay in supported and suspended exfoliated graphene
P. J. Hale, S. M. Hornett, J. Moger +2
Near infrared pump-probe spectroscopy has been used to measure the ultrafast dynamics of photoexcited charge carriers in monolayer and multilayer graphene. We observe two decay pro…