Excited-State-Mediated Capture of Carriers Into the Ground State and the Saturation of Optical Power in Quantum-Dot Lasers

2006 ◽  
Vol 18 (24) ◽  
pp. 2611-2613 ◽  
Author(s):  
Li Jiang ◽  
Levon V. Asryan
Keyword(s):  
Excited State ◽  
Quantum Dot ◽  
Ground State ◽  
Optical Power ◽  
Quantum Dot Lasers

Effect of active-region modulation doping on simultaneous ground-state and excited-state lasing in quantum-dot lasers

2012 ◽  
Vol 46 (10) ◽  
pp. 1331-1334 ◽  
Author(s):  
Yu. M. Shernyakov ◽  
M. V. Maksimov ◽  
A. E. Zhukov ◽  
A. V. Savelyev ◽  
V. V. Korenev ◽  
...  
Keyword(s):  
Excited State ◽  
Active Region ◽  
Quantum Dot ◽  
Ground State ◽  
Quantum Dot Lasers ◽  
Modulation Doping

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.

Excited state spectral blowup induced by carrier dynamics in the ground state of a quantum dot laser

2017 ◽  
Author(s):  
Bryan Kelleher ◽  
David Goulding ◽  
Boguslaw Tykalewicz ◽  
Stephen P. Hegarty ◽  
Ilya Dubinkin ◽  
...  
Keyword(s):  
Excited State ◽  
Quantum Dot ◽  
Ground State ◽  
Carrier Dynamics ◽  
Quantum Dot Laser

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

Shannon entropy and decoherence of bound magnetopolaron in a modified cylindrical quantum dot

2015 ◽  
Vol 29 (35n36) ◽  
pp. 1550241 ◽  
Author(s):  
A. J. Fotue ◽  
S. C. Kenfack ◽  
M. Tiotsop ◽  
N. Issofa ◽  
A. V. Wirngo ◽  
...  
Keyword(s):  
Excited State ◽  
Quantum Dot ◽  
Density Matrix ◽  
Shannon Entropy ◽  
Ground State ◽  
Superposition State ◽  
First Excited State ◽  
Coupling Strengths ◽  
The Magnetic Field ◽  
Bound Magnetopolaron

In this paper, we calculate the time evolution of the quantum mechanical state of a bound magnetopolaron in a modified cylindrical quantum dot. In the condition of strong coupling, we investigate the eigen energies and the eigenfunctions of the ground state and the first excited state, respectively. This system may be employed as a two-level quantum system qubit and therefore be helpful for storage of information. The Shannon entropy is used to investigate the decoherence of the qubit when the latter is in the superposition state of the ground and the first excited states. We also study the influence of the electric field, the magnetic field and the Coulomb potential on the decoherence time, eigen energies of the ground state, and the first excited state. It is shown that, the phonon spontaneous emission causes the decoherence of the qubit. We plot the decay of the density matrix of the qubit and the coherent term of the density matrix element [Formula: see text] (or [Formula: see text]) in a function of time for different coupling strengths, confinement lengths and dispersion coefficient.

Excited State Bilayer Quantum Dot Lasers at 1.3 µm

2011 ◽  
Vol 50 (4) ◽  
pp. 04DG10 ◽  
Author(s):  
Mohammed A. Majid ◽  
David T. D. Childs ◽  
Hifsa Shahid ◽  
Siming C. Chen ◽  
Kenneth Kennedy ◽  
...  
Keyword(s):  
Excited State ◽  
Quantum Dot ◽  
Quantum Dot Lasers

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
Sign in / Sign up

Export Citation Format

Share Document