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Transition from Diffusive to Superdiffusive Transport in Carbon Nanotube Networks via Nematic Order Control
Michael Wais, Filchito Renee G. Bagsican, Natsumi Komatsu +8
The one-dimensional confinement of quasiparticles in individual carbon nanotubes (CNTs) leads to extremely anisotropic electronic and optical properties. In a macroscopic ensemble…
Kramers nodal lines and Weyl fermions in SmAlSi
Yichen Zhang, Yuxiang Gao, Xue-Jian Gao +16
Kramers nodal lines (KNLs) have recently been proposed theoretically as a special type of Weyl line degeneracy connecting time-reversal invariant momenta. KNLs are robust to spin o…
Terahertz Excitonics in Carbon Nanotubes: Exciton Autoionization and Multiplication
Filchito Renee G. Bagsican, Michael Wais, Natsumi Komatsu +10
Excitons play major roles in optical processes in modern semiconductors, such as single-wall carbon nanotubes (SWCNTs), transition metal dichalcogenides, and 2D perovskite quantum…
Uncooled Carbon Nanotube Photodetectors
Xiaowei He, Francois Leonard, Junichiro Kono
Photodetectors play key roles in many applications such as remote sensing, night vision, reconnaissance, medical imaging, thermal imaging, and chemical detection. Several propertie…
Rapid Scanning Terahertz Time-Domain Magnetospectroscopy with a Table-Top Repetitive Pulsed Magnet
G. T. Noe, Q. Zhang, J. Lee +4
We have performed terahertz time-domain magnetospectroscopy by combining a rapid scanning terahertz time-domain spectrometer based on the electronically coupled optical sampling me…
High-Ampacity Power Cables of Tightly-Packed and Aligned Carbon Nanotubes
X. Wang, N. Behabtu, Colin C. Young +3
We characterize the current-carrying capacity (CCC), or ampacity, of highly-conductive, light, and strong carbon nanotube (CNT) fibers by measuring their failure current density (F…
Review of Anisotropic Terahertz Material Response
T. Arikawa, Q. Zhang, L. Ren +2
Anisotropy is ubiquitous in solids and enhanced in low-dimensional materials. In response to an electromagnetic wave, anisotropic absorptive and refractive properties result in dic…
Enhancement of the Electron Spin Resonance of Single-Walled Carbon Nanotubes by Oxygen Removal
W. D. Rice, R. T. Weber, A. D. Leonard +6
We have observed a nearly fourfold increase in the electron spin resonance (ESR) signal from an ensemble of single-walled carbon nanotubes (SWCNTs) due to oxygen desorption. By per…
Carbon Nanotube Terahertz Polarizer
L. Ren, C. L. Pint, L. G. Booshehri +8
We describe a film of highly-aligned single-walled carbon nanotubes that acts as an excellent terahertz linear polarizer. There is virtually no attenuation (strong absorption) when…
Existence of an upper limit on the density of excitons in carbon nanotubes by diffusion-limited exciton-exciton annihilation: Experiment and theory
Yoichi Murakami, Junichiro Kono
Through an investigation of photoemission properties of highly-photoexcited single-walled carbon nanotubes, we demonstrate that there is an upper limit on the achievable excitonic…
Ultrahigh-Field Hole Cyclotron Resonance Absorption in InMnAs Films
Y. H. Matsuda, G. A. Khodaparas, M. A. Zudov +10
We have carried out an ultrahigh-field cyclotron resonance study of p-type In1-xMnxAs films, with Mn composition x ranging from 0% to 2.5%, grown on GaAs by low-temperature molecul…
Laser-Induced Above-Bandgap Transparency in GaAs
A. Srivastava, R. Srivastava, J. Wang +1
We report the observation of large () laser-induced above-bandgap transparency in GaAs at room temperature. The induced transparency is present only during the pulse widt…
Ultrafast Photoinduced Softening in a III-V Ferromagnetic Semiconductor for Non-thermal Magneto-Optical Recording
G. A. Khodaparast, J. Wang, J. Kono +2
Through time-resolved two-color magneto-optical Kerr spectroscopy we have demonstrated that photogenerated transient carriers decrease the coercivity of ferromagnetic InMnAs at low…
Cyclotron Resonance of Itinerant Holes in Ferromagnetic InMnAs/GaSb Heterostructures
G. A. Khodaparast, J. Kono, Y. H. Matsuda +6
We report the first observation of hole cyclotron resonance (CR) in ferromagnetic InMnAs/GaSb heterostructures both in the high-temperature paramagnetic phase and the low-temperatu…