Enhancement of energy relaxation rates near metal-coated dielectric cylinders

Banyard, Geoffrey; Bennett, C. R.; Babiker, M.

doi:10.1016/s0030-4018(02)01447-5

Cited by 13 publications

(10 citation statements)

References 18 publications

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“…Although the decay emission of atoms in dielectric waveguides has been investigated [8], the atomic motion neither with steady state nor dynamical aspects optical forces in this structure have been reported before. Work along these lines is now in progress and the results will be reported in due course.…”

Section: Resultsmentioning

confidence: 94%

“…An evanescent mode pattern of guiding process a long hollow cylindrical waveguide has been suggested and the success was achieved in controlling atomic motion inside the submicron dimensions regime [6,8]. Normally the mechanisms * e-mail: alawfi99@hotmail.com of the atomic motion in light are controlled by the optical Bloch equations and they are solved in the steady state [212], to illustrate the mean optical forces for a two-and three-level atom.…”

Section: Introductionmentioning

confidence: 99%

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Transient Dynamics of Atoms Inside Submicron Rectangular Waveguides

Al-Awfi

2013

Acta Phys. Pol. A

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The time evolution of the radiation pressure forces due to the action of a laser light on two-level atom moving inside a long hollow cylinder with a rectangular cross-section of sub-wavelength dimensions a × b is presented. This evolution is considered when the frequency of the light is comparable to a dipole allowed transition frequency. In this limit, the decay emission Γ is possible only via a very small number of modes. From the solutions of the Bloch equations in the dynamic regime, we nd that the transient regime, applicable from the instant the laser is switched on. This is important for the gross motion, provided that the upper-state lifetime Γ −1 is relatively long while the steady-state regime, formally such that t Γ −1 , is appropriate for the evaluation of the forces and the dynamics for large Γ . Signicant variations of the characteristics of the system are emphasized. These features are illustrated using typical parameters for the case of Eu 3+ that has a particularly small Γ .

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Transient Dynamics of Atoms Inside Submicron Rectangular Waveguides

Al-Awfi

2013

Acta Phys. Pol. A

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“…The theory considering such features should additionally accommodate the first type of the atom waveguide, namely, the evanescent mode guides which can now have a novel feature, nanoscale dimensions. Although the emission decay for the atoms in the dielectric waveguides has already been investigated [21], the details of the JCM for the two-level atoms and its dynamics, along the lines discussed in this study, have not yet been reported. The work along these lines is now in progress.…”

Section: Discussionmentioning

confidence: 99%

“…3 as a dependence on the gt parameter for different detuning values 21  . The field is described by the coherent state with the Poisson distribution at the centre 20   .…”

Section: Dynamics Of the Jaynes-cummings Modelmentioning

confidence: 99%

The Jaynes-Cummings model dynamics for nano-optical systems

Al-Awfi¹

2012

Ukr. J. Phys. Opt.

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Abstract. We investigate a two-level atom Jaynes-Cummings model and its dynamics for a nano-optical system. The optical system is assumed to be a hollow cylindrical waveguide with a circular cross section. Since the system is assumed to have nanoscale dimensions, the interaction process is strictly affected only by a single waveguide mode. The atom-mode coupling and the probability amplitudes are evaluated for different waveguide parameters as functions of the mode frequency.

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“…The cylindrical geometries are already known to have generated particular interest for their usefulness not just as electromagnetic waveguides, but also as atom guides, where the guiding mechanism is governed mainly by the excited cavity modes. It is envisioned that the understanding of atom guides at such a small scale would lead to much desirable advances in atom lithography, which in turn should facilitate atomic physics research [121].…”

Section: Fig 2: (Color Online)mentioning

confidence: 99%

Surface Plasmons in Coaxial Metamaterial Cables

Kushwaha

Djafari‐Rouhani

2013

Mod. Phys. Lett. B

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Thanks to Victor Veselago for his hypothesis of negative index of refraction, metamaterials -engineered composites -can be designed to have properties difficult or impossible to find in nature: they can have both electrical permitivity (ǫ) and magnetic permeability (µ) simultaneously negative. The metamaterials -henceforth negative-index materials (NIMs) -owe their properties to subwavelength structure rather than to their chemical composition. The tailored electromagnetic response of the NIMs has had a dramatic impact on the classical optics: they are becoming known to have changed many basic notions related with the electromagnetism. The present article is focused on gathering and reviewing the fundamental characteristics of plasmon propagation in the coaxial cables fabricated of the right-handed medium (RHM) [with ǫ > 0, µ > 0] and the left-handed medium (LHM) [with ǫ < 0, µ < 0] in alternate shells starting from the innermost cable. Such structures as conceived here may pave the way to some interesting effects in relation to, e.g., the optical science exploiting the cylindrical symmetry of the coaxial waveguides that make it possible to perform all major functions of an optical fiber communication system in which the light is born, manipulated, and transmitted without ever leaving the fiber environment, with precise control over the polarization rotation and pulse broadening. The review also covers briefly the nomenclature, classification, potential applications, and the limitations (related, e.g., to the inherent losses) of the NIMs and their impact on the classical electrodynamics, in general, and in designing the cloaking devices, in particular. Recent surge in efforts on invisibility and the cloaking devices seems to have spoiled the researchers worldwide: proposals include not only a way to hide an object without having to wrap the cloak around it, but also to replace a given object with another, thus adding to the deception even further! All this is attributed as much to the fundamental as to the practical advances made in the fabrication and characterization of NIMs. The report concludes addressing briefly the anticipated implications of plasmon observation in the multicoaxial cables and suggesting future dimensions worth adding to the problem. The background provided is believed to make less formidable the task of future writers of reviews in this field. The civilization of the ancient Greeks, Hindus, and Romans has been immensely influential on the art, education, architecture, language, politics, philosophy, science, and technology of the modern world: from the surviving fragments of classical antiquity until the Renaissance in Western Europe. While descriptions of disciplined empirical scientific methods have been employed since the Middle Ages, the dawn of modern science is generally traced back to the early modern period during what is known as the Scientific Revolution of the 16th and 17th centuries. From the Middle Ages to the Enlightenment, the preferred term for the study of nature a...

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Enhancement of energy relaxation rates near metal-coated dielectric cylinders

Cited by 13 publications

References 18 publications

Transient Dynamics of Atoms Inside Submicron Rectangular Waveguides

Transient Dynamics of Atoms Inside Submicron Rectangular Waveguides

The Jaynes-Cummings model dynamics for nano-optical systems

Surface Plasmons in Coaxial Metamaterial Cables

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