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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 33, Iss. 7 — Apr. 1, 2008
  • pp: 753–755

Structured lens formed by a 2D square hole array in a metallic film

Yanzhong Chen, Chongxi Zhou, Xiangang Luo, and Chunlei Du  »View Author Affiliations

Optics Letters, Vol. 33, Issue 7, pp. 753-755 (2008)

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A method is proposed to modulate phase using variant square holes in a metallic film based on a fundamental mode approximation model. Phase retardation through square holes in a subwavelength scale in a thin metal film has been analyzed and calculated. Based on the model, a structured lens with a numerical aperture of 0.583 and a focal length of 240 μ m formed by a 2D square hole array in a metallic film is designed. Numerical simulation using the finite-difference time-domain method is carried out, and the results agree with the theoretical analysis. A focal spot close to the diffraction limit can be obtained.

© 2008 Optical Society of America

OCIS Codes
(080.3620) Geometric optics : Lens system design
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(230.3990) Optical devices : Micro-optical devices
(240.0310) Optics at surfaces : Thin films

ToC Category:
Geometric optics

Original Manuscript: December 5, 2007
Revised Manuscript: January 28, 2008
Manuscript Accepted: February 1, 2008
Published: March 31, 2008

Yanzhong Chen, Chongxi Zhou, Xiangang Luo, and Chunlei Du, "Structured lens formed by a 2D square hole array in a metallic film," Opt. Lett. 33, 753-755 (2008)

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