Results 171 to 180 of about 3,793 (206)

Superradiance in semiconductors

Semiconductors, 1999
The dependences of the characteristic superradiance time in quantum well InGaAs/GaAs laser heterostructures on the pump current, temperature, and cross sections of the active region are studied by analyzing electroluminescence spectra. The number of dipoles involved in forming a superradiant pulse is estimated using elementary equations from the theory
S. V. Zaitsev, L. A. Graham, D. L. Huffaker, N. Yu. Gordeev, V. I. Kopchatov, L. Ya. Karachinsky, I. I. Novikov, P. S. Kop’ev   +7 more
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Swept-Gain Superradiance: Evolution from the Superradiant State

1984
There are contrasts and similarities between swept-gain superradiance1 and Dicke superradiance2, and these have been discussed3,4. The main characteristics of the pulses radiated under conditions supportive of Dicke superradiance are quite similar to those predicted1 and observed5 for swept-Cain superradiance.
C. M. Bowden, F. P. Mattar
openaire   +1 more source

Superradiance in Molecular H Aggregates

Physical Review Letters, 2003
Direct evidence of superradiance from an organic semiconductor (quaterthiophene) whose molecules are arranged in a H aggregate fashion, is reported. Time resolved photoluminescence measurements show a linear correlation between the radiative lifetime (tau(rad)) of the purely electronic exciton recombination and the inverse of the number (N(C)) of the ...
MEINARDI, FRANCESCO, Cerminara, M, SASSELLA, ADELE, Bonifacio, R, TUBINO, RICCARDO   +4 more
openaire   +3 more sources

A Superradiant Laser

1994
We discuss stationary superradiance from a laser with N identical three-level atoms. Cooperative radiation is made possible by a cavity supporting two modes, each in resonance with an atomic transition. For large N, substantial squeezing results even in the presence of pump fluctuations and spontaneous emission.
F. Haake, M. I. Kolohov, C. Fabre, E. Giacobino, S. Reynaud   +4 more
openaire   +1 more source

Intense superradiant and stimulated-superradiant sources of THz radiation

The 33rd IEEE International Conference on Plasma Science, 2006. ICOPS 2006. IEEE Conference Record - Abstracts., 2006
Summary form only given. Superradiant emission (in the sense of Dicke), is the cooperative coherent radiation emission of individual charges that emit in phase with each other. The emitted radiative energy is then proportional to N2 (N-the number of emitting charges).
A. Gover, E. Dyunin, Y. Lurie, Y. Pinhasi, T. Shaftan, J. Rose   +5 more
openaire   +1 more source

The Super of Superradiance

Science, 2009
Cooperative single-photon emission from an atom ensemble will provide insights into quantum electrodynamics and applications in quantum communication.
Marlan O. Scully, Anatoly A. Svidzinsky
openaire   +1 more source

Superradiant Effects in Photon Echo Decays -The Superradiant Echo

1990
Photon echo decays in molecular solids are profoundly influenced by intermolecular interactions. For example, in organic mixed molecular crystals the echo decay is strongly dependent on the impurity concentration.1–4,8 Previous theories2–4 deal mostly with the effect of static dipole-dipole coupling on the echo decay.
Frank C. Spano, W. S. Warren
openaire   +1 more source

Triggered superradiance

Physical Review A, 1992
Keitel, C., Scully, M., Süßmann, G.
openaire   +3 more sources

Superradiant laser

Physical Review Letters, 1993
, Haake, , Kolobov, , Fabre, , Giacobino, , Reynaud   +4 more
openaire   +2 more sources

Fluctuation in superradiance

Physica A: Statistical Mechanics and its Applications, 1976
Abstract The fluctuation of the intensity of superradiant pulse is calculated by applying a general asymptotic evaluation method of quantal macrovariables to a superradiant master equation. It is shown that the fluctuation of superradiant intensity is proportional to the cube of the number of the relevant atoms.
openaire   +1 more source