Journal ArticleDOI
Analysis of semiconductor microcavity lasers using rate equations
Gunnar Björk,Yoshihisa Yamamoto +1 more
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In this paper, the rate equations for a microcavity semiconductor laser are solved and the steady-state behavior of the laser and some of its dynamic characteristics are investigated, and it is shown that by manipulating the mode density and the spontaneous decay rates of the cavity modes, the threshold gain can be decreased and the modulation speed can be improved.Abstract:
The rate equations for a microcavity semiconductor laser are solved and the steady-state behavior of the laser and some of its dynamic characteristics are investigated. It is shown that by manipulating the mode density and the spontaneous decay rates of the cavity modes, the threshold gain can be decreased and the modulation speed can be improved. However, in order to fully exploit the possibilities which the modification of the spontaneous decay opens up, the active material volume in the cavity must be smaller than a certain value. Threshold current using different definitions, population inversion factor, L-I curves, linewidth, and modulation response are discussed. >read more
Citations
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Journal ArticleDOI
Observing chaos for quantum-dot microlasers with external feedback
F. Albert,C. Hopfmann,Stephan Reitzenstein,Christian Schneider,Sven Höfling,Lukas Worschech,Martin Kamp,Wolfgang Kinzel,Alfred Forchel,Ido Kanter +9 more
TL;DR: It is experimentally demonstrated that chaos can be observed for quantum-dot microlasers operating close to the quantum limit at nW output powers and gain competition of few quantum dots in the active layer enhances the influence of self-feedback and will open up new avenues for the study of chaos in quantum systems.
Journal ArticleDOI
On the linewidth of microcavity lasers
TL;DR: In this paper, the frequency and phase noise of vertical-cavity surface-emitting microlasers is calculated using rate equations and Langevin noise sources, and it is shown that an increase of the spontaneous emission coupling coefficient will not necessarily lead to an increase in linewidth.
Journal ArticleDOI
Ultrafast photonic crystal lasers
TL;DR: In this paper, the authors describe recent progress in photonic crystal nanocavity lasers with an emphasis on their recent results on ultrafast pulse generation, and describe laser dynamics in optically pumped single cavities and in coupled cavity arrays, at low and room temperature.
Journal ArticleDOI
Purcell Effect in the Stimulated and Spontaneous Emission Rates of Nanoscale Semiconductor Lasers
Bruno Romeira,Andrea Fiore +1 more
TL;DR: In this article, the role of the Purcell effect in the stimulated and spontaneous emission rates of semiconductor lasers is investigated, taking into account the carriers' spatial distribution in the volume of the active region over a wide range of cavity dimensions and emitter/cavity linewidths, enabling the detailed modeling of the static and dynamic characteristics of either micro- or nano-scale lasers using singlemode rate-equations analysis.
Journal ArticleDOI
Semiclassical theory of lasing in photonic crystals
TL;DR: In this article, the generalized Maxwell-Bloch equations for an incoherently pumped atomic system in interaction with the electromagnetic reservoir of a photonic crystal were derived using Bloch functions as carrier waves in conjunction with multiscale analysis.
References
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Electric field dependence of optical absorption near the band gap of quantum-well structures.
David A. B. Miller,Daniel S. Chemla,T. C. Damen,Arthur C. Gossard,W. Wiegmann,Thomas H. Wood,Charles A. Burrus +6 more
TL;DR: Detailed calculations of the shift of exciton peaks are presented including (i) exact solutions for single particles in infinite wells, (ii) tunneling resonance calculations for finite wells, and (iii) variational calculations ofexciton binding energy in a field.
Journal ArticleDOI
Inhibited Spontaneous Emission
TL;DR: The radiative properties of an atom in a cavity differ fundamentally from the atom's radiative property in free space as mentioned in this paper. But the cavity causes slight shifts in the energies of the atom, analogous to radiative shifts.
Journal ArticleDOI
Observation of cavity-enhanced single-atom spontaneous emission
TL;DR: It has been observed that the spontaneous-emission lifetime of Rydberg atoms is shortened by a large ratio when these atoms are crossing a high-Q$ superconducting cavity tuned to resonance with a millimeter-wave transition between adjacent Ryd Berg states as mentioned in this paper.
Journal ArticleDOI
Inhibited spontaneous emission by a Rydberg atom.
TL;DR: Spontaneous radiation by an atom in a Rydberg state is inhibited by use of parallel conducting planes to eliminate the vacuum modes at the transition frequency.