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
A quantum optical study of thresholdless lasing features in high-β nitride nanobeam cavities.
Stefan T. Jagsch,Noelia Vico Triviño,Frederik Lohof,Gordon Callsen,Gordon Callsen,Stefan Kalinowski,Ian Rousseau,Roy Barzel,Jean-François Carlin,Frank Jahnke,Raphaël Butté,Christopher Gies,Axel Hoffmann,Nicolas Grandjean,Stephan Reitzenstein +14 more
TL;DR: The authors present temperature dependent studies of GaN nanobeam lasers grown on a silicon substrate and demonstrate high-β lasing at room temperature and show a lasing transition in the absence of a threshold nonlinearity at 156 K.
Journal ArticleDOI
Spontaneous emission from excitons in cylindrical dielectric waveguides and the spontaneous-emission factor of microcavity ring lasers
Daniel Y. Chu,Seng-Tiong Ho +1 more
Abstract: The modification of the spontaneous emission from various dipoles in a cylindrical dielectric waveguide is studied as a function of the refractive index and the radius of the waveguide. It is found that the emission rates of the axial dipoles and the radial dipoles can be modified to enhance greatly the fraction of radial dipole emission that goes into the guided lasing modes. The total emission from the axial dipoles can be suppressed. This combination gives a high spontaneous-emission factor β for a microcavity ring laser. Other microlaser structures that have high β values are also discussed. We conclude that microlasers based on strongly guided single-mode dielectric waveguides are promising devices for achieving high β values and low lasing thresholds.
Journal ArticleDOI
Rate equation description of quantum noise in nanolasers with few emitters
Jesper Mørk,Gian Luca Lippi +1 more
TL;DR: In this article, the rate equations for micro-and nanocavity laser systems were formulated and compared with simulations using a stochastic approach avoiding the mean-field approximation of the rate equation.
Journal ArticleDOI
Temporal coherence of a photonic crystal nanocavity laser with high spontaneous emission coupling factor
TL;DR: Temporal coherence of a continuous-wave photonic crystal nanocavity laser is investigated in detail using interference experiments at room temperature in this paper, where spontaneous emission efficiently couples to the lasing mode.
Journal ArticleDOI
Continuous wave blue lasing in III-nitride nanobeam cavity on silicon.
TL;DR: This work illustrates the high potential of III-nitrides on silicon for the realization of low power nanophotonic devices with a reduced footprint that would be of prime interest for fundamental light-matter interaction studies and a variety of lab-on-a-chip applications including biophotonics.
References
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Journal ArticleDOI
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.
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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.
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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.