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Atomic coherence

About: Atomic coherence is a research topic. Over the lifetime, 877 publications have been published within this topic receiving 29395 citations.


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Proceedings ArticleDOI
TL;DR: In this paper, a phase conjugation wave was generated in a solid based on stored atomic coherence via electromagnetically induced transparency effect, and the phase matching condition was characterized both theoretically and experimentally in detail.
Abstract: Phase conjugation wave was generated in a solid based on stored atomic coherence via electromagnetically induced transparency effect. The phase matching condition was characterized both theoretically and experimentally in detail. Simulations fit experimental data well.
Proceedings ArticleDOI
TL;DR: In this article, the frequency resolved gating of laser-induced atomic coherence enables complete reconstruction of the quantum evolution of atomic and molecular systems driven by laser fields, which is applied to characterization and control of laser matter interactions.
Abstract: (35 Word Limit) Frequency resolved gating of laser-induced atomic coherence enables complete reconstruction of the quantum evolution of atomic and molecular systems driven by laser fields. The method is applied to characterization and control of laser-matter interactions.
Proceedings ArticleDOI
19 May 2002
TL;DR: In this article, the propagation of a weak probe pulse in an optically dense medium in presence of a strong coupling pulse, resonant to conjugated transition, is investigated and the features of spatial and temporal evolution of the probe pulse and the atomic coherence are analyzed at different relations between pulse duration and relaxation time of the medium.
Abstract: Summary form only given. In this report the propagation of a weak probe pulse in an optically dense medium in presence of strong coupling pulse, resonant to conjugated transition, is investigated. We consider the case when at the medium entrance both pulses have the identical shape, but duration of coupling pulse is greater than duration of probe pulse. The intensity of the probe pulse is considered much less than the intensity of the coupling one. The features of spatial and temporal evolution of the probe pulse and the atomic coherence are analyzed at different relations between pulse duration and relaxation time of the medium.
Proceedings ArticleDOI
TL;DR: In this article, the feasibility of remote sensing impurities through coherent Raman techniques was investigated using a backward propagating beam in conjunction with conventional laser sources, and the authors presented the characterization of remote coherence brightened lasing in atmosphere.
Abstract: We present the characterization of remote coherence brightened lasing in atmosphere. Using this backward propagating beam in conjunction with conventional laser sources, we show the feasibility of remote sensing impurities through novel coherent Raman techniques.
01 Jan 2009
TL;DR: In this article, the effects of many-body Coulomb interactions on the optical response of Germanium nanocrystals (NCs) have been analyzed and the results indicate that Ge NCs can be used to generate optically and electrically controllable slow light.
Abstract: SLOW LIGHT IN GERMANIUM NANOCRYSTALS Umit Keles M.S. in Physics Advisor: Assoc. Prof. Dr. Ceyhun Bulutay August, 2009 The phenomena of quantum coherence has been applied with great success in the atomic systems. For optoelectronic applications the interest is inherently directed towards the semiconductor heterostructures. Large number of works have proposed and analyzed the atomic quantum coherence effects in the semiconductors. In this respect, nanocrystals (NCs) are very promising structures for seeking the quantum coherence phenomena due to their atomic-like electronic structure. Furthermore, their robust structure, integrability and larger excitonic lifetimes with respect to atomic systems makes them more promising candidates for the technological applications. Within an atomistic pseudopotential electronic structure framework, the optical Bloch equations (OBEs) originating from atomic coherence theory are derived and solved numerically for Ge NCs. The results are interpreted in the context of coherent population oscillations (CPO). Narrow dips are observed in the absorption profiles which corresponds to high dispersions within a transparency window and produce slow light. A systematic study of the size-scaling of slow-down factor with respect to NC diameter and controllable slow light by applying external Stark field are provided. The results indicate that Ge NCs can be used to generate optically and electrically controllable slow light. The many-body Coulomb interactions which underlie the quantum coherence and dephasing are of central importance in semiconductor quantum confined systems. The effects of many-body interactions on the optical response of Ge NCs have been analyzed. The semiconductor optical Bloch equations (SBEs) are derived in a semiclassical approach and the Coulomb correlations are included at the level of Hartree-Fock approximation.

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20235
202222
202121
202024
201923
201825