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Self-collimation and subwavelength lensing in wavy two-dimensional photonic crystals

Li Yi-Yu Gu Pei-Fu Li Ming-Yu Zhang Jin-Long Liu Xu

Self-collimation and subwavelength lensing in wavy two-dimensional photonic crystals

Li Yi-Yu, Gu Pei-Fu, Li Ming-Yu, Zhang Jin-Long, Liu Xu
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  • Abstract views:  3372
  • PDF Downloads:  1094
  • Cited By: 0
Publishing process
  • Received Date:  15 September 2005
  • Accepted Date:  04 November 2005
  • Published Online:  20 May 2006

Self-collimation and subwavelength lensing in wavy two-dimensional photonic crystals

  • 1. 浙江大学现代光学仪器国家重点实验室,杭州 310027

Abstract: The equal-frequency surface of wavy two-dimensional (2D) photonic crystals (PC) is obtained by virtue of plane wave expansion method. From the equal-frequency surface, we find a iso-frequency contour of rectangular form. A flat dispersion relation exists at this frequency, which is suitable for the self-collimation. The finite-difference time-domain (FDTD) method is used to simulate the self-collimation in wavy 2DPC on which a Gaussian beam is incident at different angles. Subwavelength lensing by self-collimation is also available in wavy 2DPC. The resolution of 0.28λ is achieved when single source is employed in simulation. The resolution will gradually degrade as the source moves beyond the near-field domain.

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