Secondary emission and acoustic-phonon scattering induced by strong magnetic fields in multiple quantum wells

1992 ◽  
Vol 46 (24) ◽  
pp. 16005-16011 ◽  
Author(s):  
V. F. Sapega ◽  
V. I. Belitsky ◽  
T. Ruf ◽  
H. D. Fuchs ◽  
M. Cardona ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Quantum Wells ◽  
Acoustic Phonon ◽  
Phonon Scattering ◽  
Secondary Emission ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Strong Magnetic Fields

OBSERVATION OF PHOTOLUMINESCENCE FROM MAGNETO-PLASMAS UNDER INTENSE FEMTOSECOND EXCITATION IN STRONG MAGNETIC FIELDS

2004 ◽  
Vol 18 (27n29) ◽  
pp. 3775-3780
Author(s):  
Y. D. JHO ◽  
X. WANG ◽  
G. D. SANDERS ◽  
D. H. REITZE ◽  
C. J. STANTON ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Quantum Wells ◽  
Landau Levels ◽  
Emission Lines ◽  
Multiple Quantum Wells ◽  
High Magnetic Fields ◽  
Multiple Quantum ◽  
Threshold Intensity ◽  
Strong Magnetic Fields ◽  
Narrow Emission

We report results on measurements of magneto-photoluminescence at 4.2 K in In x Ga 1-x As multiple quantum wells in high magnetic fields (25 Tesla) and laser intensities (25 GW/cm 2) using 150 fs pulses. Novel magneto-plasma phenomena are observed, including strikingly narrow emission lines of Landau levels above a threshold intensity and the suppression of exciton-mixing-induced anti-crossings.

Resonant one-acoustic-phonon Raman scattering in multiple quantum wells

1992 ◽  
Vol 84 (11) ◽  
pp. 1039-1042 ◽  
Author(s):  
V.F Sapega ◽  
V.I Belitsky ◽  
A.J Shields ◽  
T Ruf ◽  
M Cardona ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Quantum Wells ◽  
Acoustic Phonon ◽  
Multiple Quantum Wells ◽  
Multiple Quantum

Magneto-optical study of CdTe/Cd1−TxMnxTe multiple quantum wells under high magnetic fields

1994 ◽  
Vol 201 ◽  
pp. 415-418 ◽  
Author(s):  
Shinji Kuroda ◽  
Kazutoshi Kojima ◽  
Kôji Kobayashi ◽  
Yutaka Shirai ◽  
Kôki Takita ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Quantum Wells ◽  
Multiple Quantum Wells ◽  
High Magnetic Fields ◽  
Multiple Quantum ◽  
Optical Study

scholarly journals Large coherent acoustic-phonon oscillation observed in InGaN/GaN multiple-quantum wells

1999 ◽  
Vol 75 (9) ◽  
pp. 1249-1251 ◽  
Author(s):  
Chi-Kuang Sun ◽  
Jian-Chin Liang ◽  
Christopher J. Stanton ◽  
Amber Abare ◽  
Larry Coldren ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Acoustic Phonon ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Phonon Oscillation ◽  
Coherent Acoustic Phonon

Control of coherent acoustic phonon generation with external bias in InGaN/GaN multiple quantum wells

2012 ◽  
Vol 100 (10) ◽  
pp. 101105 ◽  
Author(s):  
C. S. Kim ◽  
J. H. Kim ◽  
H. Jeong ◽  
Y. D. Jho ◽  
H. K. Kwon ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Acoustic Phonon ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
External Bias ◽  
Phonon Generation ◽  
Coherent Acoustic Phonon

scholarly journals Landau levels and shallow donor states in GaAs/AlGaAs multiple quantum wells at megagauss magnetic fields

2017 ◽  
Vol 95 (11) ◽  
Author(s):  
M. Zybert ◽  
M. Marchewka ◽  
E. M. Sheregii ◽  
D. G. Rickel ◽  
J. B. Betts ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Quantum Wells ◽  
Shallow Donor ◽  
Landau Levels ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Donor States ◽  
Megagauss Magnetic Fields

Lineshape Analysis of Intersubband Transitions in Multiple Quantum Wells

1995 ◽  
Vol 406 ◽  
Author(s):  
G. Gumbs
Keyword(s):  
Absorption Spectrum ◽  
Quantum Wells ◽  
Exchange Interaction ◽  
Phonon Scattering ◽  
Peak Position ◽  
Absorption Peak ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Intersubband Transitions ◽  
Electron Effective Mass

AbstractConduction intersubband transitions between the ground and first excited states in Al0.3Ga0.7As/GaAs multiple quantum wells (MQWs) are studied as a function of the twodimensional electron gas density (0.75 × 1012 ≤ σ ≤ 3.75 × 1012 cm−2) and temperature (5 ≤ T ≤ 300 K). There is no electron tunneling between the wells and well regions are uniformly doped with silicon donors. Theoretically, we have solved the Schrödinger equation containing the self-consistent Hartree potential, in which the z-dependencies of both electron effective mass and dielectric constant, as well as the non-parabolicity in the conduction energy subband dispersion have been taken into consideration. By applying many-body theory which includes the depolarization-shift from a collective dipole moment and the excitonicshift from the negative exchange interaction, we calculate the absorption spectrum as a function of the incident photon energy hw for different values of T and σ. From this, we can quantitatively analyze both T- and σ-dependencies of the peak position and the full width at half-maximum (FWHM) of peak values. The blue-shift or red-shift in the absorption peak position are quantitatively reproduced as either T or σ is reduced. The exchange interaction which depends on σ, will modify the energy subband dispersion. Therefore, the absorption peak will be broadened by the exchange interaction. The T-dependence of broadening from the optical-phonon scattering is also taken into account by a phenomenological model. From the calculated absorption spectrum as a function of o, we have successfully reproduced and explained the σ-dependence of FWHM measured in recent experiments.

Quantum kinetics of exciton-folded acoustic phonon in GaAs multiple quantum wells

2007 ◽  
Vol 122-123 ◽  
pp. 536-538
Author(s):  
Yoshihiro Ogawa ◽  
Akihiro Iwamatsu ◽  
Fujio Minami
Keyword(s):  
Quantum Wells ◽  
Acoustic Phonon ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Quantum Kinetics ◽  
Kinetics Of
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