Optical quenching of ZnS(Cu) green fluorescence

Alzetta, G.; Chudáček, I.; Scarmozzino, R.

doi:10.1007/bf02755089

Cited by 8 publications

(8 citation statements)

References 4 publications

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“…The phenomenon is also called "coherent population trapping" [15] or "dark resonance" and has been demonstrated in many systems [16] including single trapped ions [17]. It belongs to a large class of quantum interference effects in multilevel systems [18] and can be understood as a destructive interference of the two pathways to the excited level [19].…”

Section: Ground State Laser Cooling Using Electromagnetically Inducedmentioning

confidence: 99%

Ground State Laser Cooling Using Electromagnetically Induced Transparency

2000

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A laser cooling method for trapped atoms is described which achieves ground state cooling by exploiting quantum interference in a driven L-shaped arrangement of atomic levels. The scheme is technically simpler than existing methods of sideband cooling, yet it can be significantly more efficient, in particular when several motional modes are involved, and it does not impose restrictions on the transition linewidth. We study the full quantum mechanical model of the cooling process for one motional degree of freedom and show that a rate equation provides a good approximation.

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Section: Ground State Laser Cooling Using Electromagnetically Inducedmentioning

confidence: 99%

Ground State Laser Cooling Using Electromagnetically Induced Transparency

2000

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“…For more than two decades, coherent effects leading to quantum interference in the amplitudes of optical transitions have been widely studied in atomic media, opening the way to controlled modifications of their optical properties [1]. More specifically, such processes as coherent population trapping [2,3] or electromagnetically induced transparency (EIT) [4][5][6] allow one to take advantage of the modification of an atomic system by a so-called control field to change the transmission characteristics of a probe field. These features are especially important for the implementation of optical quantum memories [7] relying on dynamic EIT [8], or for coherent driving of a great variety of systems, ranging from superconducting circuits [9] to nanoscale optomechanics [10].…”

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confidence: 99%

Experimental investigation of the transition between Autler-Townes splitting and electromagnetically-induced-transparency models

et al. 2013

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Two phenomena can affect the transmission of a weak signal field through an absorbing medium in the presence of a strong additional field: electromagnetically induced transparency (EIT) and Autler-Townes splitting (ATS). Being able to discriminate between the two is important for various applications. Here we present an experimental investigation into a method that allows for such a disambiguation as proposed in [Phys. Rev. Lett. 107, 163604 (2011)]. We apply the proposed test based on Akaike's information criterion to a coherently driven ensemble of cold cesium atoms and find a good agreement with theoretical predictions, therefore demonstrating the suitability of the method. Additionally, our results demonstrate that the value of the Rabi frequency for the ATS/EIT model transition in such a system depends on the level structure and on the residual inhomogeneous broadening.PACS numbers: 42.50. Gy, 42.50.Ct, Fine engineering of interactions between light and matter is critical for various purposes, including information processing and high-precision metrology. For more than two decades, coherent effects leading to quantum interference in the amplitudes of optical transitions have been widely studied in atomic media, opening the way to controlled modifications of their optical properties [1]. More specifically, such processes as coherent population trapping [2,3] or electromagnetically induced transparency (EIT) [4-6] allow one to take advantage of the modification of an atomic system by a so-called control field to change the transmission characteristics of a probe field. These features are especially important for the implementation of optical quantum memories [7] relying on dynamic EIT [8], or for coherent driving of a great variety of systems, ranging from superconducting circuits [9] to nanoscale optomechanics [10].However, if in general the transparency of an initially absorbing medium for a probe field is increased by the presence of a control field, two very different processes can be invoked to explain it in a Λ-type configuation. One of them is a quantum Fano interference between two paths in a three-level system [11], which occurs even at very low control intensity and gives rise to EIT [12]. The other one is the appearance of two dressed states in the excited level at large control intensity, corresponding to the Autler-Townes splitting (ATS) [13][14][15]. Discerning whether a transparency feature observed in an absorption profile is the signature of EIT or ATS is therefore crucial [16][17][18]. A recent paper by P.M. Anisimov, J.P. Dowling and B.C. Sanders [19] introduced a versatile and quantitative test to discriminate between these two phenomena.In this paper, we report an experimental study of the proposed witness, relying on a detailed analysis of the absorption profile of a probe field in an atomic ensemble in the presence of a control field. In order to analyze the quantum interferences in detail and avoid any inhomogeneous broadening, our study is performed with an ensemble of cold cesium ato...

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“…For atoms in free space, atomic coherence and quantum interference are the basic phenomena for controlling spontaneous emission [1][2][3]; these have potential applications to lasing without inversion [4][5][6][7][8][9][10]. Zhu, Scully, and co-workers have studied the quenching of spontaneous emission using an open V-type atom [11], and gave an experimental verification of their predictions [12].…”

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confidence: 99%