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Optics Express

Optics Express

  • Vol. 17, Iss. 7 — Mar. 30, 2009
  • pp: 5645–5655

The role of dispersion in the propagation of rotating beams in left-handed materials

Qiang Lv, Hongyao Liu, Hailu Luo, Shuangchun Wen, Weixing Shu, Yanhong Zou, and Dianyuan Fan  »View Author Affiliations

Optics Express, Vol. 17, Issue 7, pp. 5645-5655 (2009)

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We theoretically study the role of dispersion in propagation of rotating beams in left-handed materials (LHMs). By modeling the rotating beam as a superposition of two rotating Laguerre-Gaussian beams with opposite chirality, same magnitude and different frequencies, we demonstrate that the rotation property of the rotating beam in LHM is significantly dependent on the sign and strength of dispersion: In the normal dispersion region, the direction of transverse energy flow is reversed compared to the vacuum, due to the negative refractive index of LHM, while in the anomalous dispersion region it may be parallel or antiparallel to that in the case of vacuum, depending on the strength of dispersion. In addition, we find that the angular momentum density can be parallel or antiparallel to the transverse energy flow in LHM, while the angular momentum flow is always opposite to the transverse energy flow.

© 2009 Optical Society of America

OCIS Codes
(260.2030) Physical optics : Dispersion
(260.2110) Physical optics : Electromagnetic optics
(260.2160) Physical optics : Energy transfer
(350.5500) Other areas of optics : Propagation
(350.3618) Other areas of optics : Left-handed materials

ToC Category:
Physical Optics

Original Manuscript: January 9, 2009
Revised Manuscript: March 7, 2009
Manuscript Accepted: March 16, 2009
Published: March 25, 2009

Qiang Lv, Hongyao Liu, Hailu Luo, Shuangchun Wen, Weixing Shu, Yanhong Zou, and Dianyuan Fan, "The role of dispersion in the propagation of rotating beams in left-handed materials," Opt. Express 17, 5645-5655 (2009)

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