Excited states and optical power of ground-state emission in quantum dot lasers with asymmetric barrier layers

2021 ◽  
Author(s):  
Levon V. Asryan ◽  
John L. Monk
Keyword(s):  
Quantum Dot ◽  
Excited States ◽  
Ground State ◽  
Optical Power ◽  
Quantum Dot Lasers ◽  
Barrier Layers

scholarly journals Effect of excited states on the ground-state modulation bandwidth in quantum dot lasers

2013 ◽  
Vol 102 (19) ◽  
pp. 191102 ◽  
Author(s):  
Yuchang Wu ◽  
Robert A. Suris ◽  
Levon V. Asryan
Keyword(s):  
Quantum Dot ◽  
Excited States ◽  
Ground State ◽  
Quantum Dot Lasers ◽  
Modulation Bandwidth

scholarly journals Digitally Chirped Multilayer Quantum Dot Lasers with Dual-Wavelength Lasing Emissions

2019 ◽  
Vol 9 (11) ◽  
pp. 2246
Author(s):  
Yi-Jan Sun ◽  
Pin-Hsien Hsieh ◽  
Gray Lin
Keyword(s):  
Theoretical Model ◽  
Quantum Dot ◽  
Ground State ◽  
Slope Efficiency ◽  
Injection Current ◽  
Dual Wavelength ◽  
Quantum Dot Lasers ◽  
Simulation Results ◽  
Current Characteristics

The dual-wavelength lasing emissions of digitally chirped multilayer quantum dot (QD) lasers are investigated both experimentally and theoretically. The two lasing wavelengths are both identified as ground-state (GS) emissions but originated from different stacks of QD multilayers. The lasing spectra exhibited broadening and splitting properties by injecting more current. Moreover, the wavelength-resolved light-current characteristics reveal that first GS lasing intensity upon the threshold of second GS transitions neither saturates nor droops with increasing injection current, but increases with slightly reduced slope efficiency. A theoretical model is developed for digitally chirped multilayer QD lasers. The simulation results qualitatively reproduce the experimental observations.

Analytical model of ground-state lasing phenomenon in broadband semiconductor quantum dot lasers

2013 ◽  
Author(s):  
Vladimir V. Korenev ◽  
Artem V. Savelyev ◽  
Alexey E. Zhukov ◽  
Alexander V. Omelchenko ◽  
Mikhail V. Maximov
Keyword(s):  
Quantum Dot ◽  
Analytical Model ◽  
Ground State ◽  
Quantum Dot Lasers ◽  
Semiconductor Quantum Dot

Exact Numerical Procedure for the Binding Energy of Hydrogen Impurities in Quantum Dots with Parabolic Confinements

2013 ◽  
Vol 475-476 ◽  
pp. 1355-1358
Author(s):  
Arnold Abramov
Keyword(s):  
Quantum Dots ◽  
Wave Function ◽  
Binding Energy ◽  
Quantum Dot ◽  
Excited States ◽  
Ground State ◽  
Qualitative Agreement ◽  
Numerical Procedure ◽  
Impurity States ◽  
Parabolic Confinement

In this paper we present exact numerical procedure to calculate the binding energy and wave function of impurity states in a quantum dot with parabolic confinement. The developed method allows control the accuracy of obtained results, as well as calculates the characteristics of not only ground state, but also of the excited states. Comparison of our results with data obtained by other methods is in quantitative and qualitative agreement. We studied the effects of impurity position on the binding energy.

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