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Springer eBooks

Excitons

Karl W. Böer, Udo W. Pohl

Published Jan 1, 2022• 0 citations
Publisher
DOI
10.1007/978-3-319-06540-3_14-4

Related papers

Excitons

Karl W. Böer, Udo W. Pohl

Springer eBooks•Jan 1, 2023•8 citations

Exciton-polariton amplification based on exciton-exciton scattering in a CdTe quantum well

Robin K. Huang, Y. Yamamoto, R. André +3 more

Summary form only given. Final state stimulation is the origin of amplification in optical lasers and atom lasers. Matter-wave amplification based on an incoherent gain medium has yet to be demonstrated, but is very attractive, particularly for the excitonic system, because electrically injected incoherent excitons can amplify probe excitons without requiring a coherent pump laser. In previous work, we have shown final state stimulation using the exciton-exciton scattering of polaritons in a GaAs based microcavity quantum well; the gain was negligibly small due to the small exciton-exciton scattering rate. However, the rate of exciton-exciton scattering at the exciton saturation density is 9 times larger in CdTe microcavity exciton-polaritons compared to those in GaAs.

Quantum Electronics and Laser Science Conference•Nov 13, 2002•0 citations

Light squeezing via exciton-exciton interaction in semiconductors

Nguyen Ba An

In the excitonic polariton picture light squeezing is studied as a function of the exciton-exciton interaction. The influence of the photon frequency detuning, the initial photon intensity and exciton density as well as the magnitude of both the exciton-exciton and exciton-photon interactions on the squeezing process of light are investigated in detail.

Quantum Optics Journal of the European Optical Society Part B•Dec 1, 1992•6 citations

Excitonic Phases

Walter Kohn

Physical Review Letters•Aug 21, 1967•230 citations

Effects of higher exciton manifolds and exciton-exciton annihilation on optical bistable response of an ultrathin glassy film comprised of oriented linear Frenkel chains

H. Glaeske, Victor A Malyshev, K.‐H. Feller

We theoretically analyze the optical response from an ultrathin film built up of oriented molecular aggregates, the operating states of which are represented by Frenkel exciton states. A four-level model, involving transitions between the ground, one-exciton and two-exciton states, exciton-exciton annihilation from the two-exciton state as well as relaxation from the annihilation level back to the one-exciton and ground states, is used for describing the film optical response. It is proved that the exciton-exciton annihilation may act not as a destructive but, on the contrary, as a constructive factor tending towards the occurrence of bistability. In particular, the effect of inhomogeneous broadening of the exciton optical transition, preventing the bistable behavior, may be suppressed considerably due to a fast exciton-exciton annihilation.

Physical Review A•Feb 26, 2002•13 citations

Magnetic Excitons

Jean-Louis Basdevant, Jean Dalibard

Advanced texts in physics•Jan 1, 2000•0 citations
Summary form only given. Final state stimulation is the origin of amplification in optical lasers and atom lasers. Matter-wave amplification based on an incoherent gain medium has yet to be demonstrated, but is very attractive, particularly for the excitonic system, because electrically injected incoherent excitons can amplify probe excitons without requiring a coherent pump laser. In previous work, we have shown final state stimulation using the exciton-exciton scattering of polaritons in a GaAs based microcavity quantum well; the gain was negligibly small due to the small exciton-exciton scattering rate. However, the rate of exciton-exciton scattering at the exciton saturation density is 9 times larger in CdTe microcavity exciton-polaritons compared to those in GaAs.
We theoretically analyze the optical response from an ultrathin film built up of oriented molecular aggregates, the operating states of which are represented by Frenkel exciton states. A four-level model, involving transitions between the ground, one-exciton and two-exciton states, exciton-exciton annihilation from the two-exciton state as well as relaxation from the annihilation level back to the one-exciton and ground states, is used for describing the film optical response. It is proved that the exciton-exciton annihilation may act not as a destructive but, on the contrary, as a constructive factor tending towards the occurrence of bistability. In particular, the effect of inhomogeneous broadening of the exciton optical transition, preventing the bistable behavior, may be suppressed considerably due to a fast exciton-exciton annihilation.