34 citations · 59 across the 5 of their papers we have counts for
5 papers · 1 filter
THz Transient Photoconductivity of the III-V Dilute Nitride GaPAsN
J. N. Heyman, E. M. Weiss, J. R. Rollag +5
THz Time-Resolved Photoconductivity is used to probe carrier dynamics in the dilute III-V nitride GaP0.49As0.47N0.036. In these measurements a femtosecond optical pump-pulse excite…
Carrier Lifetimes in a III-V-N Intermediate Band Semiconductor
J. N. Heyman, A. M. Schwartzberg, K. M. Yu +5
We have used transient absorption spectroscopy to measure carrier lifetimes in the multiband band semiconductor GaPAsN. These measurements probe the electron populations in the con…
Carrier Lifetime Enhancement in a Tellurium Nanowire/PEDOT:PSS Nanocomposite by Sulfur Passivation
James N. Heyman, Ayaskanta Sahu, Nelson E. Coates +2
We report static and time-resolved terahertz (THz) conductivity measurements of a high- performance thermoelectric material containing tellurium nanowires in a PEDOT:PSS matrix. Co…
Ultrafast THz Faraday Rotation in Graphene
J. N. Heyman, R. F. Foo Kune, B. A. Alebachew +2
Terahertz (THz) Faraday rotation measurements were performed to investigate carrier dynamics in p-type CVD graphene. We used static and time-resolved polarization-sensitive THz tra…
Carrier Heating and Negative Photoconductivity in Graphene
J. N. Heyman, J. D. Stein, Z. S. Kaminski +3
We investigated negative photoconductivity in graphene using ultrafast terahertz techniques. Infrared transmission was used to determine the Fermi energy, carrier density and mobil…