%0 Journal Article
%T Comparative Analysis of the Static and Dynamic Performances of Quantum-Dot lasers and Quantum Cascade Lasers Using Rate Equations Model
%J Journal of Research on Many-body Systems
%I Shahid Chamran University of Ahvaz
%Z 2322-231X
%A Yousefvand, Hossein Reza
%D 2018
%\ 08/23/2018
%V 8
%N 17
%P 191-203
%! Comparative Analysis of the Static and Dynamic Performances of Quantum-Dot lasers and Quantum Cascade Lasers Using Rate Equations Model
%K Comparative analysis
%K Quantum-dot laser
%K Quantum cascade laser
%K Rate equation
%R 10.22055/jrmbs.2018.13899
%X In this paper, the static and dynamic performances of quantum-dot (QD) semiconductor lasers and quantum cascade (QC) lasers are characterized and analyzed comparatively using the standard rate equations model. Using the presented model, the effect of photon lifetime on both the device’s output characteristics is investigated. Simulated results show that due to the ultrafast nature of intersubband transitions (ISTs) in QC lasers that dominantly induced by the longitudinal optical (LO) phonon emission with a picosecond time scale, the threshold current in QC lasers are much larger than is common for QD lasers, in which the intrinsic carrier lifetime is on the order of a few nanoseconds due to the nature of band-to-band Auger recombination process. Additionally, since the LO-phonon scattering process in QC lasers is an ultra-fast mechanism, transient oscillations of the photon density are overdamped, and no resonance appears in the frequency response. This is in contrast with the transient oscillations and frequency response of QD lasers. For comparison, this unique feature makes QC lasers ideally suited for high-speed operation.
%U https://jrmbs.scu.ac.ir/article_13899_7c748f9aab66e08a6d609e4e165b5f72.pdf