Parallelization of the R-matrix propagation method for the study of intense-laser-driven semiconductor superlattices. (English) Zbl 1264.82158

Maeshima, Nobuya; Hino, Ken-ichi

Comput. Phys. Commun. 183, No. 1, 8-14 (2012).

Summary: The parallelization of the R-matrix propagation method for the study of intense-laser-driven semiconductor superlattices is described. We focus on photo-dressed excitonic electron-hole pair states related to the optical properties of the system concerned. Here, we parallelize the loop of propagation sectors, which is regarded as a rate-determining step in the whole calculation: in each sector calculated, the R-matrix Green functions are playing a key role. The evaluated parallelization efficiency is found to besufficiently high, compared with a conventional algorithm without such parallelization. Restriction of this efficiency arising from the inter-core communications is also discussed. Further, it is shown that by virtue of the present parallelization, we readily obtain high-resolution excitonic absorption spectra revealing a conspicuous dynamic Fano resonance.

MSC:

82D37	Statistical mechanical studies of semiconductors
78A60	Lasers, masers, optical bistability, nonlinear optics
82B20	Lattice systems (Ising, dimer, Potts, etc.) and systems on graphs arising in equilibrium statistical mechanics
65Y05	Parallel numerical computation
82-08	Computational methods (statistical mechanics) (MSC2010)
35Q82	PDEs in connection with statistical mechanics

Keywords:

semiconductor superlattice; optical properties; exciton; R-matrix; parallelization

Software:

PRMAT

References:

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