171 citations · 439 across the 24 of their papers we have counts for
10 papers · 1 filter
Separation of interface and substrate carrier dynamics at a heterointerface based on coherent optical phonons
Kunie Ishioka, Ethan Angerhoffer, Christopher J. Stanton +4
Transient reflectivity spectroscopy is widely used to study ultrafast carrier- and phonon-dynamics in semiconductors. In their heterostructures, it is often not straightforward to…
Light-Activated Nuclear Spin Polarization in Dilute Ferromagnetic (Ga,Mn)As
John T. Tokarski, Clifford R Bowers, Sunil K. Thapa +5
We study light-induced nuclear spin-polarization in a thin film of Ga1-xMnxAs (x 0.04), a dilute ferromagnetic semiconductor, grown on a GaAs substrate. High-field inductively-dete…
Experimental Measurements of Effective Mass in Near Surface InAs Quantum Wells
Joseph Yuan, Mehdi Hatefipour, Brenden A. Magill +11
Near surface indium arsenide quantum wells have recently attracted a great deal of interest since they can be interfaced epitaxially with superconducting films and have proven to b…
Valley and Zeeman Splittings in Multilayer Epitaxial Graphene Revealed by Circular Polarization Resolved Magneto-infrared Spectroscopy
Y. Jiang, Z. Lu, J. Gigliotti +7
Circular polarization resolved magneto-infrared studies of multilayer epitaxial graphene (MEG) are performed using tunable quantum cascade lasers in high magnetic fields up to 17.5…
Direct Characterization of Band Bending in GaP/Si(001) Heterostructures with Hard X-ray Photoelectron Spectroscopy
Martin Schmid, Kunie Ishioka, Andreas Beyer +9
We apply hard X-ray photoelectron spectroscopy (HAXPES) to investigate the electronic structures in ~50-nm thick epitaxial GaP layers grown on Si(001) under different conditions. D…
Theory of magneto-optical properties of core-shell spherical quantum dots doped with radial-position-controlled magnetic impurities
G. D. Sanders, C. J. Stanton
We present a theory for the electronic and magneto-optical properties of spherical quantum dots consisting of an inner core surrounded by an outer shell. This core-shell quantum do…
Ultrafast Generation of Fundamental and Multiple-order Phonon Excitations in Highly-Enriched (6,5) Single-Wall Carbon Nanotubes
Y. -S. Lim, A. R. T. Nugraha, S. -J. Cho +14
Using a macroscopic ensemble of highly-enriched (6,5) single-wall carbon nanotubes, combined with high signal-to-noise ratio, time-dependent differential transmission spectroscopy,…
Circular-Polarization Dependent Cyclotron Resonance in Large-Area Graphene in Ultrahigh Magnetic Fields
L. G. Booshehri, C. H. Mielke, D. G. Rickel +11
Using ultrahigh magnetic fields up to 170 T and polarized midinfrared radiation with tunable wavelengths from 9.22 to 10.67 um, we studied cyclotron resonance in large-area graphen…
Carrier dynamics and coherent acoustic phonons in nitride heterostructures
G. D. Sanders, C. J. Stanton
We model generation and propagation of coherent acoustic phonons in piezoelectric InGaN/GaN multi-quantum wells embedded in a \textit{pin} diode structure and compute the time reso…
Cyclotron Resonance in Ferromagnetic InMnAs/(Al,Ga)Sb Heterostructures
G. A. Khodaparast, J. Kono, Y. H. Matsuda +9
We report the observation of hole cyclotron resonance (CR) in InMnAs/(Al,Ga)Sb heterostructures in a wide temperature range covering both the paramagnetic and ferromagnetic phases.…