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10th International Conference on Laser and Fiber-Optical Networks Modeling (LFNM 2010). 2nd IEEE International Workshop on THz Radiation: Basic Research and Applications (TERA 2010)
We analyze applicability of the ε" <; 0 approximation to wave propagation in active material, comparing the results to the FDTD-based calculation employing more general Maxwell-Bloch model. It is shown that the slab thickness should be less than some critical value, corresponding to the divergence of the Airy series and to the start of the laser generation.
The behaviour of a scalar optical beam at the boundary between two dissimilar nonlinear media is of fundamental interest in photonics. Here, we report the first systematic generalization of our Kerr analyses to a wider class of power-law materials. Universal refraction laws will be given, and theory-simulation agreement demonstrated.
Spontaneous emission of a quantum dot placed in a 1D photonic band gap structure is analytically studied. Part of energy which remains nonradiated is obtained. It is shown that decay first follows ~t-1/2 law changing to ~t-3/2 law. Analytical expression for the spectrum is obtained. Analytical theory of the Borrmann effect is developed.
Polariton modes in quantum-well traps for Bose-condensation of excitons are studied. It is found that some modes can become unstable and start lasing due to exciton spectrum narrowing during condensation. A model of such lasing is developed, showing different lasing regimes and possible coherent features of recombination emission of excitons.
In the given paper we proposed an effective finite-difference scheme for a two-dimensional problem of femtosecond pulse influence on a semiconductor in the case of nonlinear dependence of light energy absorption coefficient on electric field potential.
Approximate theory of interaction of optical waves with pure reflection gratings at fulfillment of the second and third orders Bragg conditions has been developed. Expressions of the reflectance were obtained. The start-oscillation conditions in gratings with amplification were searched. It is found that reflectance zeros are near generating modes of grating with amplification in gratings without...
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