Publications by authors named "Connor D W Mosley"
Article Synopsis
- Asynchronous optical sampling (ASOPS) is effectively used to measure terahertz (THz) bandwidth pulses in coplanar waveguides with integrated photoconductive switches for signal excitation and detection.
- The ASOPS technique shows high performance, able to capture full THz time-domain traces at up to 100 Hz, with a dynamic range that peaks at 40 dB for short measurements and increases to 88 dB for longer durations.
- This research paves the way for advancements in real-time video-rate imaging and THz sensing applications, demonstrating the capability of ASOPS to achieve sufficient dynamic range for future THz spectroscopy measurements.
Periodically-poled lithium niobate (PPLN) sources consisting of custom-built stacks of large-area wafers provide a unique opportunity to systematically study the multi-cycle terahertz (THz) generation mechanism as they are assembled layer-by-layer. Here we investigate and optimize the THz emission from PPLN wafer stacks as a function of wafer number, pump fluence, pulse duration and chirp, wafer separation, and pump focusing. Using 135 µm-thick, 2"-diameter wafers we generate high-energy, narrowband THz pulses with central frequencies up to 0.
View Article and Find Full Text PDFWe have examined the conductive properties of carbon nanotube based thin films, which were prepared via dispersion in water by non-covalent functionalization of the nanotubes with xylan, a type of hemicellulose. Measurements of low temperature conductivity, Kelvin probe force microscopy, and high frequency (THz) conductivity elucidated the intra-tube and inter-tube charge transport processes in this material. The measurements show excellent conductive properties of the as prepared thin films, with bulk conductivity up to 2000 S cm.
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