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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 13 — Jun. 21, 2010
  • pp: 14165–14172

Imitating the Cherenkov radiation in backward directions using one-dimensional photonic wires

Tetsuyuki Ochiai  »View Author Affiliations

Optics Express, Vol. 18, Issue 13, pp. 14165-14172 (2010)

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A novel radiation emission from traveling charged particles in vacuum is theoretically demonstrated. This radiation is conical as in the Cherenkov radiation, but emerges in backward directions of the particle trajectories. The basic mechanism of the radiation is the Smith-Purcell effect via the interaction between the charged particles and a circular-symmetric photonic wire with a one-dimensionally periodic dielectric function. The wire exhibits the photonic band structure characterized with angular momentum. The charged particle can resonantly excite the photonic band modes with particular angular momentum, depending on the particle velocity. A simple kinetics of the Smith-Purcell effect enables us to design the conical radiation emitted in backward directions. Numerical results of the backward radiation are also presented for a metallic wire with aligned air holes.

© 2010 Optical Society of America

OCIS Codes
(050.1960) Diffraction and gratings : Diffraction theory
(290.4210) Scattering : Multiple scattering
(230.5298) Optical devices : Photonic crystals

ToC Category:
Physical Optics

Original Manuscript: May 25, 2010
Revised Manuscript: June 9, 2010
Manuscript Accepted: June 9, 2010
Published: June 16, 2010

Tetsuyuki Ochiai, "Imitating the Cherenkov radiation in backward directions using one-dimensional photonic wires," Opt. Express 18, 14165-14172 (2010)

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