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Title: Reversed propagation dynamics of Laguerre-Gaussian beams in left-handed materials

Abstract

On the basis of angular spectrum representation, the reversed propagation dynamics of a Laguerre-Gaussian beam in left-handed materials (LHMs) is presented. We show that the negative phase velocity gives rise to a reversed screw of the wave front, and ultimately leads to a reversed rotation of the optical vortex. Furthermore, the negative Gouy-phase shift causes an inverse spiral of the Poynting vector. It is found that the Laguerre-Gaussian beam in LHMs will present the same propagation characteristics as the counterpart with opposite topological charges in regular right-handed materials (RHMs). The momentum conservation theorem ensures that the tangential component of the wave momentum at the RHM-LHM boundary is conserved. It is shown that although the linear momentum reverses its direction, the angular momentum remains unchanged.

Authors:
 [1];  [1]; ;  [2]
  1. Department of Physics, Nanjing University, Nanjing 210008 (China)
  2. School of Computer and Communication, Hunan University, Changsha 410082 (China)
Publication Date:
OSTI Identifier:
21140559
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 77; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevA.77.023812; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANGULAR MOMENTUM; GAUSSIAN PROCESSES; LINEAR MOMENTUM; PHASE SHIFT; PHASE VELOCITY; POYNTING THEOREM; ROTATION; SPECTRA; VORTICES

Citation Formats

Hailu, Luo, School of Computer and Communication, Hunan University, Changsha 410082, Zhongzhou, Ren, Weixing, Shu, and Shuangchun, Wen. Reversed propagation dynamics of Laguerre-Gaussian beams in left-handed materials. United States: N. p., 2008. Web. doi:10.1103/PHYSREVA.77.023812.
Hailu, Luo, School of Computer and Communication, Hunan University, Changsha 410082, Zhongzhou, Ren, Weixing, Shu, & Shuangchun, Wen. Reversed propagation dynamics of Laguerre-Gaussian beams in left-handed materials. United States. doi:10.1103/PHYSREVA.77.023812.
Hailu, Luo, School of Computer and Communication, Hunan University, Changsha 410082, Zhongzhou, Ren, Weixing, Shu, and Shuangchun, Wen. Fri . "Reversed propagation dynamics of Laguerre-Gaussian beams in left-handed materials". United States. doi:10.1103/PHYSREVA.77.023812.
@article{osti_21140559,
title = {Reversed propagation dynamics of Laguerre-Gaussian beams in left-handed materials},
author = {Hailu, Luo and School of Computer and Communication, Hunan University, Changsha 410082 and Zhongzhou, Ren and Weixing, Shu and Shuangchun, Wen},
abstractNote = {On the basis of angular spectrum representation, the reversed propagation dynamics of a Laguerre-Gaussian beam in left-handed materials (LHMs) is presented. We show that the negative phase velocity gives rise to a reversed screw of the wave front, and ultimately leads to a reversed rotation of the optical vortex. Furthermore, the negative Gouy-phase shift causes an inverse spiral of the Poynting vector. It is found that the Laguerre-Gaussian beam in LHMs will present the same propagation characteristics as the counterpart with opposite topological charges in regular right-handed materials (RHMs). The momentum conservation theorem ensures that the tangential component of the wave momentum at the RHM-LHM boundary is conserved. It is shown that although the linear momentum reverses its direction, the angular momentum remains unchanged.},
doi = {10.1103/PHYSREVA.77.023812},
journal = {Physical Review. A},
issn = {1050-2947},
number = 2,
volume = 77,
place = {United States},
year = {2008},
month = {2}
}