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Author Olejniczak, Lukasz ♦ SUPELEC, OPTEL ♦ Panajotov, Krassimir ♦ Thienpont, Hugo ♦ Sciamanna, Marc
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword NANOSCIENCE AND NANOTECHNOLOGY ♦ BIFURCATION ♦ CAPTURE ♦ EXCITED STATES ♦ FLUCTUATIONS ♦ LASERS ♦ MATHEMATICAL SOLUTIONS ♦ NOISE ♦ PERIODICITY ♦ PHOTON EMISSION ♦ PULSATIONS ♦ PULSES ♦ QUANTUM DOTS ♦ RELAXATION ♦ SCALING LAWS ♦ EMISSION ♦ ENERGY LEVELS ♦ NANOSTRUCTURES ♦ VARIATIONS
Abstract We study the dynamics of an optically injected quantum-dot laser accounting for excited states. Mapping of the bifurcations in the plane frequency detuning vs. injection strength shows that the relaxation rate scales the regions of locking and single- and double-period solutions, while the capture rate has a minor effect. Within the regions of time-periodic solutions, close to the saddle-node bifurcation boundary, we identify subregions where the output signal resembles excitable pulses as a result of the bottleneck phenomenon. We show that such emission is determined mainly by fluctuations in the occupation of the excited states. The interpulse time follows an inverse square root scaling law as a function of the detuning. In a deterministic system the pulses are periodic regardless of the detuning, but in the presence of noise, close to the locking region, the interpulse time follows a positively skewed normal distribution. For a fixed frequency detuning, increasing the noise strength can shift the mean of the interpulse time distribution and make the pulsations more periodic.
ISSN 10502947
Educational Use Research
Learning Resource Type Article
Publisher Date 2010-08-15
Publisher Place United States
Journal Physical Review. A
Volume Number 82
Issue Number 2


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