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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 21,
  • Issue 2,
  • pp. 561-
  • (2003)

Beam Steering in Planar-Photonic Crystals:From Superprism to Supercollimator

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We utilize the anomalous dispersion of planar-photonic crystals (PhCs) near the dielectric band edge to control the wavelength-dependent propagation of light. Light beams with up to 20° divergence were collimated over a 25-nm (1285 nm to 1310 nm) bandwidth using a triangular lattice. The"superprism"phenomenon is demonstrated in the same configuration, simply by tuning the wavelength. Sources of loss are discussed. Both the plane-wave expansion calculation and finite-difference time-domain simulation match well with the experimental results. This is the first experimental demonstration of self-collimating phenomena in a PhC configuration.


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