Dynamics of slow light and light storage in a Doppler-broadened electromagnetically-induced-transparency medium: A numerical approach

Shih Wei Su, Yi Hsin Chen, Shih Chuan Gou, Tzyy Leng Horng, Ite A. Yu

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

We present a numerical scheme to study the dynamics of slow light and light storage in an electromagnetically-induced-transparency (EIT) medium at finite temperatures. Allowing for the motional coupling, we derive a set of coupled Schrödinger equations describing a boosted closed three-level EIT system according to the principle of Galilean relativity. The dynamics of a uniformly moving EIT medium can thus be determined by numerically integrating the coupled Schrödinger equations for atoms plus one ancillary Maxwell-Schrödinger equation for the probe pulse. The central idea of this work rests on the assumption that the loss of ground-state coherence at finite temperatures can be ascribed to the incoherent superposition of density matrices representing the EIT systems with various velocities. Close agreements are demonstrated in comparing the numerical results with the experimental data for both slow light and light storage. In particular, the distinct characters featuring the decay of ground-state coherence can be well verified for slow light and light storage. This warrants that the current scheme can be applied to determine the decaying profile of the ground-state coherence as well as the temperature of the EIT medium.

Original languageEnglish
Article number013827
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume83
Issue number1
DOIs
Publication statusPublished - 2011 Jan 31

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ground state
Maxwell equation
temperature
relativity
probes
decay
profiles
pulses
atoms

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

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abstract = "We present a numerical scheme to study the dynamics of slow light and light storage in an electromagnetically-induced-transparency (EIT) medium at finite temperatures. Allowing for the motional coupling, we derive a set of coupled Schr{\"o}dinger equations describing a boosted closed three-level EIT system according to the principle of Galilean relativity. The dynamics of a uniformly moving EIT medium can thus be determined by numerically integrating the coupled Schr{\"o}dinger equations for atoms plus one ancillary Maxwell-Schr{\"o}dinger equation for the probe pulse. The central idea of this work rests on the assumption that the loss of ground-state coherence at finite temperatures can be ascribed to the incoherent superposition of density matrices representing the EIT systems with various velocities. Close agreements are demonstrated in comparing the numerical results with the experimental data for both slow light and light storage. In particular, the distinct characters featuring the decay of ground-state coherence can be well verified for slow light and light storage. This warrants that the current scheme can be applied to determine the decaying profile of the ground-state coherence as well as the temperature of the EIT medium.",
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Dynamics of slow light and light storage in a Doppler-broadened electromagnetically-induced-transparency medium : A numerical approach. / Su, Shih Wei; Chen, Yi Hsin; Gou, Shih Chuan; Horng, Tzyy Leng; Yu, Ite A.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 83, No. 1, 013827, 31.01.2011.

Research output: Contribution to journalArticle

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