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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An electrically pumped 239 nm AlGaN nanowire laser operating at room temperature
TL;DR: In this article, an electrically injected AlGaN nanowire laser operating at 239 nm at room temperature was demonstrated and the spontaneous emission coupling factor was derived to be around 0.012.
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Thresholdless quantum dot nanolaser
TL;DR: This work demonstrates thresholdless lasing in a semiconductor quantum dot nanolaser with a photonic crystal nanocavity and reveals core elements for its realization using quantum dots, paving the way to the development of ultimately energy-efficient nanolasers.
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Low-threshold surface-passivated photonic crystal nanocavity laser
TL;DR: In this paper, a photonic crystal laser is improved by passivating the In-GaAs quantum well gain medium and GaAs membrane using a (NH4)S treatment.
Journal ArticleDOI
Large spontaneous emission factor (>0.1) in the photonic crystal monopole-mode laser
TL;DR: In this paper, the monopole mode of a triangular lattice defect cavity was realized by room-temperature optical pumping with a low threshold of 0.1, which was confirmed by the investigation of carrier-density dependent wavelength blueshift of the lasing mode.
Journal ArticleDOI
Lasing at K Points of a Honeycomb Plasmonic Lattice.
TL;DR: This work identifies the lasing mode as one of the singlets with an energy minimum at the K point enabling feedback, and offers prospects for studies of topological lasing in radiatively coupled systems.
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.
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.