Direct and indirect capture of carriers into the lasing ground state and the light-current characteristic of quantum dot lasers

Abstract

Articles you may be interested inEffect of excited states on the ground-state modulation bandwidth in quantum dot lasers Appl. Phys. Lett. 102, 191102 (2013) We calculate the light-current characteristic (LCC) of a quantum dot (QD) laser under the conditions of both direct and indirect capture of carriers from the optical confinement layer into the lasing ground state in QDs. We show that direct capture is a dominant process determining the ground-state LCC. Only when direct capture is slow, the role of indirect capture (capture into the QD excited state and subsequent intradot relaxation to the ground state) becomes important. V C 2014 AIP Publishing LLC.

Analytic Characterization of the Dynamic Regimes of Quantum-Dot Lasers

“…This behavior shows that the detailed balance of the in and out-scattering rates plays a crucial role in determining the dynamics for moderate to high scattering rates. This is an important result as most models usually neglect this dependence and use constant in and out-scattering rates [26][27][28]. Those models cannot describe the third regime of quantum-dot laser dynamics.…”

Dynamic characteristics of two-state lasing quantum dot lasers under large signal modulation

“…For the theoretical model used in the study, three states including GS, ES, and wetting layer (WL) are considered in the QD laser. 15,17,18 It is assumed that the downward carriers in the WL can be either directly captured into the GS or excited-state-mediated. The carriers also can escape back to the WL via those two ways.…”