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Controlled spontaneous emission in a semi-infinite rectangular waveguide.

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Title: Controlled spontaneous emission in a semi-infinite rectangular waveguide.
Authors: Al-Awfi, S.1 alawfi99@hotmail.com
Source: Journal of Russian Laser Research. Dec2025, Vol. 46 Issue 4-6, p114-125. 12p.
Subjects: Photon emission, Rectangular waveguides, Waveguides, Microfabrication, Quantization (Physics), Cartesian coordinates, Electric dipole moments, Atomic models
Abstract: The main focus of this paper is on investigating the spontaneous emission process of an excited two-level atom interacting with a vacuum in a rectangular waveguide surrounded by a perfect electric conductor. According to the second quantization formalism, the location and direction of the electric dipole are the main factors governing the process of suppression or enhancement. The stationary approach assumes that the electric dipole has a fixed direction; hence, spontaneous emission is presented in three perpendicular Cartesian coordinates. This approach can be considered valid when certain conditions are available, such as a short waveguide length and high atomic velocity. It explicitly ignores the fact that the electric dipole vector is a dynamic variable. On the other hand, the dynamic approach presents the total spontaneous emission as a directional sum of possible coordinates, which improves the product and makes it closer to experimental results. This approach only requires pre-excitation by an external light mode in order to control the expected directions. The single-mode waveguide offers a radical solution that completely avoids the electric dipole orientation obstacle. Its production has been made possible by advances in micro-fabrication technology. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Russian Laser Research is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 194006182
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Controlled spontaneous emission in a semi-infinite rectangular waveguide.
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  Data: <searchLink fieldCode="AR" term="%22Al-Awfi%2C+S%2E%22">Al-Awfi, S.</searchLink><relatesTo>1</relatesTo><i> alawfi99@hotmail.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Russian+Laser+Research%22">Journal of Russian Laser Research</searchLink>. Dec2025, Vol. 46 Issue 4-6, p114-125. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Photon+emission%22">Photon emission</searchLink><br /><searchLink fieldCode="DE" term="%22Rectangular+waveguides%22">Rectangular waveguides</searchLink><br /><searchLink fieldCode="DE" term="%22Waveguides%22">Waveguides</searchLink><br /><searchLink fieldCode="DE" term="%22Microfabrication%22">Microfabrication</searchLink><br /><searchLink fieldCode="DE" term="%22Quantization+%28Physics%29%22">Quantization (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Cartesian+coordinates%22">Cartesian coordinates</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+dipole+moments%22">Electric dipole moments</searchLink><br /><searchLink fieldCode="DE" term="%22Atomic+models%22">Atomic models</searchLink>
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  Data: The main focus of this paper is on investigating the spontaneous emission process of an excited two-level atom interacting with a vacuum in a rectangular waveguide surrounded by a perfect electric conductor. According to the second quantization formalism, the location and direction of the electric dipole are the main factors governing the process of suppression or enhancement. The stationary approach assumes that the electric dipole has a fixed direction; hence, spontaneous emission is presented in three perpendicular Cartesian coordinates. This approach can be considered valid when certain conditions are available, such as a short waveguide length and high atomic velocity. It explicitly ignores the fact that the electric dipole vector is a dynamic variable. On the other hand, the dynamic approach presents the total spontaneous emission as a directional sum of possible coordinates, which improves the product and makes it closer to experimental results. This approach only requires pre-excitation by an external light mode in order to control the expected directions. The single-mode waveguide offers a radical solution that completely avoids the electric dipole orientation obstacle. Its production has been made possible by advances in micro-fabrication technology. [ABSTRACT FROM AUTHOR]
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  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Russian Laser Research is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10946-025-10263-4
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      – Code: eng
        Text: English
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        PageCount: 12
        StartPage: 114
    Subjects:
      – SubjectFull: Photon emission
        Type: general
      – SubjectFull: Rectangular waveguides
        Type: general
      – SubjectFull: Waveguides
        Type: general
      – SubjectFull: Microfabrication
        Type: general
      – SubjectFull: Quantization (Physics)
        Type: general
      – SubjectFull: Cartesian coordinates
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      – SubjectFull: Electric dipole moments
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      – SubjectFull: Atomic models
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      – TitleFull: Controlled spontaneous emission in a semi-infinite rectangular waveguide.
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              M: 12
              Text: Dec2025
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              Y: 2025
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