171 citations · 439 across the 24 of their papers we have counts for
9 papers · 1 filter
Energy dependent amplitude of Brillouin oscillations in GaP
Andrey Baydin, Rustam Gatamov, Halina Krzyzanowska +2
Gallium phosphide is an important indirect band gap material with variety of applications in optics ranging from LEDs to applications in GaP/Si based solar cells. We investigated G…
Coherent optical and acoustic phonons generated at lattice-matched GaP/Si(001) heterointerfaces
Kunie Ishioka, Andreas Beyer, Wolfgang Stolz +4
Thin GaP films can be grown on an exact Si(001) substrate with nearly perfect lattice match. We perform all-optical pump-probe measurements to investigate the ultrafast electron-ph…
Evidence for an excitonic insulator phase in a zero-gap InAs/GaSb bilayer
W. Yu, V. Clericò, C. Hernández Fuentevilla +16
Many-body interactions can produce novel ground states in a condensed-matter system. For example, interacting electrons and holes can spontaneously form excitons, a neutral bound s…
Sub-picosecond acoustic pulses at buried GaP/Si interfaces
Kunie Ishioka, Avinash Rustagi, Andreas Beyer +5
We report on the optical generation and detection of ultrashort acoustic pulses that propagate in three-dimensional semiconductor crystals. Photoexcitaiton of lattice-matched GaP l…
Intrinsic coherent acoustic phonons in indirect band gap semiconductors Si and GaP
Kunie Ishioka, Avinash Rustagi, Ulrich Hoefer +2
We report on the intrinsic optical generation and detection of coherent acoustic phonons at (001)-oriented bulk Si and GaP without metallic phonon transducer structures. Photoexcit…
Transverse Acoustic Phonon Transistor Based on Asymmetric Potential Distribution
H. Jeong, Y. D. Jho, C. J. Stanton
We experimentally demonstrate a transverse acoustic (TA) phonon transistor. Phonons are coherently initiated by femtosecond photocarrier screening on potential gradients. Although…
Excitonic effects on coherent phonon dynamics in single wall carbon nanotubes
Ahmad R. T. Nugraha, Eric Rosenthal, Eddwi H. Hasdeo +4
We discuss how excitons can affect the generation of coherent radial breathing modes in ultrafast spectroscopy of single wall carbon nanotubes. Photoexcited excitons can be localiz…
Coherent Phonon Dynamics in Short-Period InAs/GaSb Superlattices
G. T. Noe, H. J. Haugan, G. J. Brown +3
We have performed ultrafast pump-probe spectroscopy studies on a series of InAs/GaSb-based short-period superlattice (SL) samples with periods ranging from 46 Åto 71 Å. We observe…
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…