Bosonic cascade lasers are terahertz (THz) lasers based on stimulated radiative transitions between bosonic condensates of excitons or exciton-polaritons confined in a trap. We study the interaction of an incoming THz pulse resonant in frequency with the transitions between neighboring energy levels of the cascade. We show that at certain optical pump conditions the cascade becomes transparent to the incident pulse: it neither absorbs nor amplifies it in the mean-field approximation. The populations of intermediate levels of the bosonic cascade change as the THz pulse passes, nevertheless. In comparison, a fermionic cascade laser does not reveal any of these properties.Bosonic cascade lasers are terahertz (THz) lasers based on stimulated radiative transitions between bosonic condensates of excitons or exciton-polaritons confined in a trap. We study the interaction of an incoming THz pulse resonant in frequency with the transitions between neighboring energy levels of the cascade. We show that at certain optical pump conditions the cascade becomes transparent to the incident pulse: it neither absorbs nor amplifies it in the mean-field approximation. The populations of intermediate levels of the bosonic cascade change as the THz pulse passes, nevertheless. In comparison, a fermionic cascade laser does not reveal any of these properties.

arXiv:1706.08635Optics LettersJan 5, 20185 citations

Theory of stimulated emission by excitons

Hermann Haken, Serge Nikitine

Springer tracts in modern physicsJan 1, 19752 citations

The Resonant Light Absorption by Semiconductor Quantum Dots

I. G. Lang, L. I. Korovin, S. T. Pavlov

The cross section of light absorption by semiconductor quantum dots in the case of the resonance with excitons $Γ_6 \times Γ_7$ in cubical crystals $T_d$ is calculated. It is shown that an interference of stimulating and induced electric and magnetic fields must be taken into account. The absorption section is proportional to the exciton nonradiative damping $γ$ .The cross section of light absorption by semiconductor quantum dots in the case of the resonance with excitons $Γ_6 \times Γ_7$ in cubical crystals $T_d$ is calculated. It is shown that an interference of stimulating and induced electric and magnetic fields must be taken into account. The absorption section is proportional to the exciton nonradiative damping $γ$.

arXiv:cond-mat/0703324Mar 13, 20070 citations

Role of spatial dispersion in light absorption by excitons

Nail Akhmediev

Journal of Experimental and Theoretical PhysicsOct 1, 19802 citations

The cross section of light absorption by semiconductor quantum dots in the case of the resonance with excitons

Γ_6 \times Γ_7

in cubical crystals

T_d

is calculated. It is shown that an interference of stimulating and induced electric and magnetic fields must be taken into account. The absorption section is proportional to the exciton nonradiative damping

γ