The role of vertical quantum wells in carrier trapping in v‐groove quantum wire lasers

1996 ◽  
Vol 68 (15) ◽  
pp. 2061-2063 ◽  
Author(s):  
C. Kiener ◽  
L. Rota ◽  
A. C. Maciel ◽  
J. M. Freyland ◽  
J. F. Ryan
Keyword(s):  
Quantum Wells ◽  
Quantum Wire ◽  
Carrier Trapping

Persistent photocurrent effects in GaN/AlGaN multiquantum wells

2001 ◽  
Vol 680 ◽  
Author(s):  
A. Bonfiglio ◽  
G. Traetta ◽  
M. Lomascolo ◽  
A. Passaseo ◽  
R. Cingolani
Keyword(s):  
Quantum Wells ◽  
Room Temperature ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Yellow Band ◽  
Carrier Trapping ◽  
Decay Times

ABSTRACTPhotoCurrent (PC) experiments on GaN/AlGaN multiple quantum wells, both spectrally and temporally resolved, have shown that a photopersistence effect exists in our samples even at room temperature. A peak in the rise and decay times of PC vs. time appears in correspondence of wavelengths typical of Yellow-Band features while this is not seen in PL. This fact seems to indicate that YB defects give rise here to carrier trapping rather than recombination. Furthermore, the observed persistence times seem to be peculiar of MultiQuantum Wells and this possibly calls into play the role of built-in fields in the defects dynamics.

scholarly journals Role of dislocations in nitride laser diodes with different indium content

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Agata Bojarska-Cieślińska ◽  
Łucja Marona ◽  
Julita Smalc-Koziorowska ◽  
Szymon Grzanka ◽  
Jan Weyher ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Defect Density ◽  
Laser Diodes ◽  
Diffusion Path ◽  
Vapour Phase ◽  
Indium Content ◽  
Nonradiative Recombination ◽  
Light Emitters ◽  
Vapour Phase Epitaxy

AbstractIn this work we investigate the role of threading dislocations in nitride light emitters with different indium composition. We compare the properties of laser diodes grown on the low defect density GaN substrate with their counterparts grown on sapphire substrate in the same epitaxial process. All structures were produced by metalorganic vapour phase epitaxy and emit light in the range 383–477 nm. We observe that intensity of electroluminescence is strong in the whole spectral region for devices grown on GaN, but decreases rapidly for the devices on sapphire and emitting at wavelength shorter than 420 nm. We interpret this behaviour in terms of increasing importance of dislocation related nonradiative recombination for low indium content structures. Our studies show that edge dislocations are the main source of nonradiative recombination. We observe that long wavelength emitting structures are characterized by higher average light intensity in cathodoluminescence and better thermal stability. These findings indicate that diffusion path of carriers in these samples is shorter, limiting the amount of carriers reaching nonradiative recombination centers. According to TEM images only mixed dislocations open into the V-pits, usually above the multi quantum wells thus not influencing directly the emission.

Role of Metal Vacancies in the Mechanism of Thermal Degradation of InGaN Quantum Wells

2021 ◽  
Vol 13 (6) ◽  
pp. 7476-7484
Author(s):  
Julita Smalc-Koziorowska ◽  
Ewa Grzanka ◽  
Artur Lachowski ◽  
Roman Hrytsak ◽  
Mikolaj Grabowski ◽  
...  
Keyword(s):  
Thermal Degradation ◽  
Quantum Wells ◽  
Metal Vacancies ◽  
Ingan Quantum Wells

The role of Coulombic coupling in electroabsorption of square quantum wells

2001 ◽  
Vol 16 (8) ◽  
pp. 724-732 ◽  
Author(s):  
X Chen ◽  
M P Earnshaw ◽  
W Batty ◽  
D W E Allsopp
Keyword(s):  
Quantum Wells

scholarly journals Evidence of blocking effect on carrier trapping process by necking region in very narrow AlGaAs/GaAs V-grooved quantum wire structure

2001 ◽  
Vol 90 (10) ◽  
pp. 5438-5440 ◽  
Author(s):  
X. Q. Liu ◽  
A. Sasaki ◽  
N. Ohno ◽  
Z. F. Li ◽  
W. Lu ◽  
...  
Keyword(s):  
Quantum Wire ◽  
Blocking Effect ◽  
Carrier Trapping ◽  
Trapping Process

scholarly journals Optical absorption in highly strained Ge/SiGe quantum wells: The role of Γ→Δ scattering

2012 ◽  
Vol 112 (12) ◽  
pp. 123105 ◽  
Author(s):  
L. Lever ◽  
Z. Ikonić ◽  
A. Valavanis ◽  
R. W. Kelsall ◽  
M. Myronov ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Quantum Wells ◽  
Highly Strained ◽  
Sige Quantum Wells

scholarly journals Erratum: “The critical role of substrate disorder in valley splitting in Si quantum wells” [Appl. Phys. Lett. 112, 243107 (2018)]

2020 ◽  
Vol 116 (4) ◽  
pp. 049901
Author(s):  
Samuel F. Neyens ◽  
Ryan H. Foote ◽  
Brandur Thorgrimsson ◽  
T. J. Knapp ◽  
Thomas McJunkin ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Critical Role ◽  
Valley Splitting
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