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

scholarly journals Power-induced lasing state switching and bistability in a two-state quantum dot laser subject to optical injection

2020 ◽  
Vol 50 (2) ◽  
Author(s):  
Zaifu Jiang ◽  
Zhengmao Wu ◽  
Elumalai Jayaprasath ◽  
Wenyan Yang ◽  
Chunxia Hu ◽  
...  
Keyword(s):  
Excited State ◽  
Quantum Dot ◽  
Ground State ◽  
The State ◽  
Optical Injection ◽  
State Switching ◽  
Quantum Dot Laser ◽  
Injection Power ◽  
Electron Escape ◽  
Free Running

We theoretically investigate power-induced lasing state switching and bistability in a two-state quantum dot laser subject to optical injection. The simulated results show that, for a free-running two-state quantum dot laser operating at the ground state under low current, a power-induced lasing state switching between the ground state and the excited state can be achieved through introducing optical injection with a frequency (winj) close to the lasing frequency of excited state (wES). The injection power required for the state switching depends on the scanning route of injection power, i.e. there may exist state bistability for the injection power within a certain region. For forward scanning injection power, with the increase of frequency detuning (ΔΩ = winj – wES), the injection power required for the state switching shows a decreasing trend accompanied by slight fluctuations. However, for backward scanning injection power, the injection power required for the state switching exhibits obvious fluctuations with the increase of ΔΩ. The width of the hysteresis loop fluctuates with ΔΩ, and the fluctuation amplitude is increased with the increase of the injection current. Additionally, the influences of the inhomogeneous broadening factor and the electron escape rate on the bistability performances are analyzed.

scholarly journals Dual-wavelength mode-locked quantum-dot laser, via ground and excited state transitions: experimental and theoretical investigation

2010 ◽  
Vol 18 (12) ◽  
pp. 12832 ◽  
Author(s):  
Maria Ana Cataluna ◽  
Daniil I. Nikitichev ◽  
Spiros Mikroulis ◽  
Hercules Simos ◽  
Christos Simos ◽  
...  
Keyword(s):  
Excited State ◽  
Quantum Dot ◽  
Theoretical Investigation ◽  
Dual Wavelength ◽  
State Transitions ◽  
Quantum Dot Laser

scholarly journals First demonstration of single-layer InAs/InP (100) quantum-dot laser: continuous wave, room temperature, ground state

2009 ◽  
Vol 45 (25) ◽  
pp. 1317 ◽  
Author(s):  
J. Kotani ◽  
P.J. van Veldhoven ◽  
T. de Vries ◽  
B. Smalbrugge ◽  
E.A.J.M. Bente ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Ground State ◽  
Room Temperature ◽  
Continuous Wave ◽  
Single Layer ◽  
Quantum Dot Laser

Effect of optical feedback to the ground and excited state emission of a passively mode locked quantum dot laser

2010 ◽  
Vol 97 (6) ◽  
pp. 061114 ◽  
Author(s):  
Charis Mesaritakis ◽  
Christos Simos ◽  
Hercules Simos ◽  
Spiros Mikroulis ◽  
Igor Krestnikov ◽  
...  
Keyword(s):  
Excited State ◽  
Quantum Dot ◽  
Optical Feedback ◽  
Quantum Dot Laser

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.

Effect of excited-state transitions on the threshold characteristics of a quantum dot laser

2000 ◽  
Author(s):  
Levon V. Asryan ◽  
Marius Grundmann ◽  
Nikolai N. Ledentsov ◽  
Oliver Stier ◽  
Robert A. Suris ◽  
...  
Keyword(s):  
Excited State ◽  
Quantum Dot ◽  
State Transitions ◽  
Quantum Dot Laser
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