Ground-state power quenching in two-state lasing quantum dot lasers

Mariangela Gioannini
2012 Journal of Applied Physics  
Detecting and tuning anisotropic mode splitting induced by birefringence in an InGaAs/GaAs/AlGaAs verticalcavity surface-emitting laser J. Appl. Phys. 111, 043109 (2012) 85°C error-free operation at 38Gb/s of oxide-confined 980-nm vertical-cavity surface-emitting lasers Appl. Phys. Lett. 100, 081103 (2012) Ultrafast response of tunnel injected quantum dot based semiconductor optical amplifiers in the 1300nm range Appl. Phys. Lett. 100, 071107 (2012) Highly tunable whispering gallery mode
more » ... gallery mode semiconductor lasers with controlled absorber Appl. Phys. Lett. 100, 061112 (2012) A capillary absorption spectrometer for stable carbon isotope ratio (13C/12C) analysis in very small samples Rev. Sci. Instrum. 83, 023101 (2012) Additional information on J. Appl. Phys. The paper analyses theoretically the quenching of the ground state (GS) power observed in InAs/GaAs quantum dot lasers when emitting simultaneously from both ground state and excited state. The model, based on a set of rate equations for the electrons, holes, and photons, shows that the power quenching is caused by the different time scales of the electron and hole intra-level dynamic, as well as by the long transport time of the holes in the GaAs barrier. The results presented also evidence how the very different dynamics of electrons and holes have other important consequences on the laser behavior; we show for example that the electron and hole carrier densities of the states resonant with lasing modes are never clamped at the threshold value, and that the damping of relaxation oscillations is strongly influenced by the hole dynamics. -3 M. Gioannini J. Appl. Phys. 111, 043108 (2012) 043108-4 M. Gioannini J. Appl. Phys. 111, 043108 (2012) 043108-5 M. Gioannini J. Appl. Phys. 111, 043108 (2012) 043108-6 M. Gioannini J. Appl. Phys. 111, 043108 (2012) 043108-7 M. Gioannini J. Appl. Phys. 111, 043108 (2012) 043108-8 M. Gioannini J. Appl. Phys. 111, 043108 (2012) FIG. 10. (Color online) Comparison between measured (solid lines) and simulated (dashed lines) L-I characteristics. 043108-9 M. Gioannini
doi:10.1063/1.3682574 fatcat:thrwpaln6beavhv26e7vdqtfgy