All-optically induced ultrafast photocurrents: beyond the instantaneous coherent response
It is demonstrated that the noninstantaneous response of the optically induced coherent
polarization tremendously influences the real-space shift of electronic charges in …
polarization tremendously influences the real-space shift of electronic charges in …
Ballistic photocurrents in semiconductor quantum wells caused by the excitation of asymmetric excitons
We theoretically investigate the generation and dynamics of photocurrents induced by
linearly polarized single-frequency light pulses in GaAs quantum wells. Our approach is …
linearly polarized single-frequency light pulses in GaAs quantum wells. Our approach is …
All-optically induced currents resulting from frequency-modulated coherent polarization
We employ polarization-shaped ultrafast optical pulses to generate photocurrents, which
only arise if the optically induced coherent polarization is frequency modulated. This …
only arise if the optically induced coherent polarization is frequency modulated. This …
Quantum beats from the coherent interaction of hole states with surface state in near-surface quantum well
We report tunneling assisted beating of carriers in a near-surface single GaAsP/AlGaAs
quantum well using transient reflectivity measurement. The observed damped oscillating …
quantum well using transient reflectivity measurement. The observed damped oscillating …
Effects of non-exciton components excited by broadband pulses on quantum beats in a GaAs/AlAs multiple quantum well
O Kojima, Y Iwasaki, T Kita, K Akahane - Scientific Reports, 2017 - nature.com
In this study, we report the effect of the excitation of non-exciton components caused by
broadband pulses on quantum beat oscillation. Using a spectrally controlled pump pulse, a …
broadband pulses on quantum beat oscillation. Using a spectrally controlled pump pulse, a …
Effects of exciton line widths on the amplitude of quantum beat oscillations
O Kojima, T Kita - Applied Physics Express, 2016 - iopscience.iop.org
In this study, we report the effects of the exciton line widths on the amplitude of quantum beat
oscillations using a model with the Voigt function. Using the Voigt function, we find that the …
oscillations using a model with the Voigt function. Using the Voigt function, we find that the …
Modulation of exciton states through resonant excitation by continuous wave lasers in a GaAs/AlAs multiple quantum well
O Kojima, T Kita, MJ Steer… - Journal of Physics D …, 2021 - iopscience.iop.org
Interactions between excitons with different energies are significant in device application,
particularly in the emission of intense terahertz (THz) waves caused by difference frequency …
particularly in the emission of intense terahertz (THz) waves caused by difference frequency …
Accessing new types of photocurrents using polarization-shaped excitation pulses
The excitation of exciton resonances in semiconductors with certain polarization-shaped
optical pulses reveals the existence of new photocurrents. For resonant excitation of …
optical pulses reveals the existence of new photocurrents. For resonant excitation of …
Coherent oscillations of holes in GaAs0.86P0.14/Al0.7Ga0.3As surface quantum well
We show that in a GaAs 0.86 P 0.14/Al 0.7 Ga 0.3 As near-surface quantum well, there is
coherent oscillation of holes observed in time-resolved reflectivity signal when the top …
coherent oscillation of holes observed in time-resolved reflectivity signal when the top …
[PDF][PDF] Photocurrents in GaAs quantum wires including excitonic effects
C NGO, HT DUC - Communications in Physics, 2021 - academia.edu
Photocurrent induced by ultrafast laser pulses in [001]-oriented GaAs quantum wires with a
square cross section is investigated using the multiband semiconductor Bloch equations …
square cross section is investigated using the multiband semiconductor Bloch equations …