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Journal of Physics Conference Series

Single photon transport by a moving atom

Anton E. Afanasiev, Павел Николаевич Мелентьев, A. A. Kuzin, A.Yu. Kalatskiy, V. I. Balykin

Published Jan 1, 2017• 1 citation
Publisher

Abstract

The results of investigation of photon transport through the subwavelength hole in the opaque screen by using single neutral atom are represented. The basis of the proposed and implemented method is the absorption of a photon by a neutral atom immediately before the subwavelength aperture, traveling of the atoms through the hole and emission of a photon on the other side of the screen. Realized method is the alternative approach to existing for photon transport through a subwavelength aperture: 1) self-sustained transmittance of a photon through the aperture according to the Bethe's model; 2) extra ordinary transmission because of surface-plasmon excitation.

DOI
10.1088/1742-6596/793/1/012001

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The results of investigation of photon transport through the subwavelength hole in the opaque screen by using single neutral atom are represented. The basis of the proposed and implemented method is the absorption of a photon by a neutral atom immediately before the subwavelength aperture, traveling of the atoms through the hole and emission of a photon on the other side of the screen. Realized method is the alternative approach to existing for photon transport through a subwavelength aperture: 1) self-sustained transmittance of a photon through the aperture according to the Bethe's model; 2) extra ordinary transmission because of surface-plasmon excitation.
The results of investigation of photon transport through the subwavelength hole in the opaque screen by using single neutral atom are represented. The basis of the proposed and implemented method is the absorption of a photon by a neutral atom immediately before the subwavelength aperture, traveling of the atoms through the hole and emission of a photon on the other side of the screen. Realized method is the alternative approach to existing for photon transport through a subwavelength aperture: 1) self-sustained transmittance of a photon through the aperture according to the Bethe’s model; 2) extra ordinary transmission because of surface-plasmon excitation.
The localization and transport of a photon through a subwavelength hole with the help of a neutral atom are studied. A method proposed and realized in the study is based on the absorption of a photon by a neutral atom directly in front of a subwavelength hole, the flight of the atom through the hole, and photon emission on the other side of the screen. The influence of the interaction of the excited atom flying through the subwavelength channel with the screen material is estimated. The estimate showed that the atomic excitation can be quenched in holes with diameters smaller than 200 nm, which affects the photon transport efficiency.
We have proposed and investigated for the first time an efficient way of photon transport through a subwavelength hole by a moving atom. The transfer mechanism is based on the reduction of the wave packet of a single photon due to its absorption by an atom and, correspondingly, its localization in a volume is smaller than both the radiation wavelength and the nanohole size. The scheme realizes the transformation of a single-photon single-mode wave packet of the laser light into a single-photon multimode wave packet in free space.
The investigation into how photons travel on atoms forms an essential aspect of understanding atomic and quantum physics. This study focuses on clarifying the fundamental principles that govern photon behaviour, including absorption, emission, scattering and quantum transitions. This research paper seeks to provide a comprehensive analysis of the mechanisms by which photons interact and move through atomic structures. Understanding these processes is crucial as they underpin fundamental atomic interactions and the behavior of matter at its most basic level. Through a detailed exploration of both theoretical frameworks and experimental evidence, the study identifies that photon travel is fundamentally governed by quantum probability, discrete energy-level transitions, and the dynamic interaction between photons and atomic electrons, the paper aims to elucidate the processes governing photon movement. By leveraging insights from various scholarly sources, this research aspires to contribute significantly to the existing body of knowledge and provide thoughtful implications for future studies in the field. This study will benefit researchers, physicists, and students working in quantum physics and atomic science by deepening their understanding of photon-atom interactions.
Plasmons on the surface of a metal increase the light intensity by several orders of magnitude. To quantify the consequences of this phenomenon in quantum processes, we calculate the excitation probability for atoms near the surface, which are excited by a single-photon pulse. Using quantum electrodynamics in the presence of absorbing dielectrics, we predict that nonradiative decay in the metal will limit the excitation probability to about one-half of the maximum that could be achieved in the absence of such losses.