High-gain and oscillatory transconductance by InGaAs/InAlAs multiple-quantum-well emitter bipolar transistor

1998 ◽  
Vol 24 (2) ◽  
pp. 169-173 ◽  
Author(s):  
W.-S. Lour
Keyword(s):  
Quantum Well ◽  
Multiple Quantum Well ◽  
High Gain ◽  
Bipolar Transistor ◽  
Multiple Quantum

RESONANT TUNNELING STUDIES OF VARIABLY SPACED MULTIPLE QUANTUM WELL STRUCTURES IN THE AlGaAs SYSTEM

1987 ◽  
Vol 48 (C5) ◽  
pp. C5-457-C5-461
Author(s):  
C. J. SUMMERS ◽  
K. F. BRENNAN ◽  
A. TORABI ◽  
H. M. HARRIS ◽  
J. COMAS
Keyword(s):  
Quantum Well ◽  
Resonant Tunneling ◽  
Multiple Quantum Well ◽  
Multiple Quantum ◽  
Quantum Well Structures

Low-Temperature Operation of Green, Blue and UV InGaN/GaN Multiple-Quantum-Well Light-Emitting Diodes

2003 ◽  
Vol 764 ◽  
Author(s):  
X. A. Cao ◽  
S. F. LeBoeuf ◽  
J. L. Garrett ◽  
A. Ebong ◽  
L. B. Rowland ◽  
...  
Keyword(s):  
Quantum Well ◽  
Light Emitting Diodes ◽  
Multiple Quantum Well ◽  
Light Output ◽  
Localized States ◽  
Multiple Quantum ◽  
Nonradiative Recombination ◽  
Light Emitting ◽  
Temperature Range ◽  
Green Leds

Absract:Temperature-dependent electroluminescence (EL) of InGaN/GaN multiple-quantum-well light-emitting diodes (LEDs) with peak emission energies ranging from 2.3 eV (green) to 3.3 eV (UV) has been studied over a wide temperature range (5-300 K). As the temperature is decreased from 300 K to 150 K, the EL intensity increases in all devices due to reduced nonradiative recombination and improved carrier confinement. However, LED operation at lower temperatures (150-5 K) is a strong function of In ratio in the active layer. For the green LEDs, emission intensity increases monotonically in the whole temperature range, while for the blue and UV LEDs, a remarkable decrease of the light output was observed, accompanied by a large redshift of the peak energy. The discrepancy can be attributed to various amounts of localization states caused by In composition fluctuation in the QW active regions. Based on a rate equation analysis, we find that the densities of the localized states in the green LEDs are more than two orders of magnitude higher than that in the UV LED. The large number of localized states in the green LEDs are crucial to maintain high-efficiency carrier capture at low temperatures.

High-Temperature High-Frequency Operation of Single and Multiple Quantum Well InGaAs Semiconductor Lasers

2000 ◽  
Author(s):  
William J. Siskaninetz ◽  
Hank D. Jackson ◽  
James E. Ehret ◽  
Jeffrey C. Wiemeri ◽  
John P. Loehr
Keyword(s):  
High Temperature ◽  
Quantum Well ◽  
Semiconductor Lasers ◽  
High Frequency ◽  
Multiple Quantum Well ◽  
Multiple Quantum ◽  
High Frequency Operation

Photoconductive response time of a multiple quantum well pin modulator

1988 ◽  
Vol 24 (14) ◽  
pp. 854 ◽  
Author(s):  
R.J. Manning ◽  
P.J. Bradley ◽  
A. Miller ◽  
J.S. Roberts ◽  
P. Mistry ◽  
...  
Keyword(s):  
Quantum Well ◽  
Response Time ◽  
Multiple Quantum Well ◽  
Multiple Quantum

GaInAs/InP waveguide multiple-quantum-well optical modulator with 9 dB on/off ratio

1987 ◽  
Vol 23 (20) ◽  
pp. 1067 ◽  
Author(s):  
K. Wakita ◽  
S. Nojima ◽  
K. Nakashima ◽  
Y. Kawaguchi
Keyword(s):  
Quantum Well ◽  
Multiple Quantum Well ◽  
Optical Modulator ◽  
Multiple Quantum

Erratum: GaAs/AlGaAs multiple quantum well pin diodes grown by selective area epitaxy

1988 ◽  
Vol 24 (17) ◽  
pp. 1117
Author(s):  
D.A. Roberts ◽  
J.P.R. David ◽  
G. Hill ◽  
P.A. Houston ◽  
M.A. Pate ◽  
...  
Keyword(s):  
Quantum Well ◽  
Multiple Quantum Well ◽  
Multiple Quantum ◽  
Pin Diodes ◽  
Selective Area Epitaxy ◽  
Selective Area

1.5μm λ/4 shifted multiple quantum well distributed feedback laser diodes

1988 ◽  
Vol 24 (23) ◽  
pp. 1408 ◽  
Author(s):  
T. Sasaki ◽  
S. Takano ◽  
N. Henmi ◽  
H. Yamada ◽  
M. Kitamura ◽  
...  
Keyword(s):  
Quantum Well ◽  
Multiple Quantum Well ◽  
Laser Diodes ◽  
Distributed Feedback ◽  
Multiple Quantum ◽  
Distributed Feedback Laser

Optimised multiple quantum well phase modulator

1989 ◽  
Vol 25 (20) ◽  
pp. 1349 ◽  
Author(s):  
P.J. Bradley ◽  
G. Parry ◽  
J.S. Roberts
Keyword(s):  
Quantum Well ◽  
Multiple Quantum Well ◽  
Phase Modulator ◽  
Multiple Quantum
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