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Applied Optics

Applied Optics


  • Vol. 51, Iss. 12 — Apr. 20, 2012
  • pp: 2172–2177

Color separation of high-density dielectric rectangular grating in the Fresnel diffraction region

Yue Fang, Qiaofeng Tan, Mingqian Zhang, and Guofan Jin  »View Author Affiliations

Applied Optics, Vol. 51, Issue 12, pp. 2172-2177 (2012)

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A high-density dielectric rectangular grating is designed for color separation in a Fresnel diffraction field. The Fresnel field distribution is analyzed and the optimization conditions for color separation are given. The process of the modes propagating and energy exchanging with the diffraction orders are expressed by modal method. The color separation for different polarizations can be realized. The energy efficiency is 96.3% at the 633 nm wavelength and 86.9% at the 488 mm wavelength for both TE polarizations, while the energy efficiency is theoretically 96.3% at the 633 nm wavelength for TE polarization and 90.6% at the 488 nm wavelength for TM polarization. The field distributions are scanned by the near-field scanning optical microscopy, and the efficiency is 71.2% for the 633 nm wavelength and 67.3% for the 488 nm wavelength for both TE polarizations experimentally.

© 2012 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(230.1950) Optical devices : Diffraction gratings
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

Original Manuscript: January 3, 2012
Manuscript Accepted: February 28, 2012
Published: April 20, 2012

Yue Fang, Qiaofeng Tan, Mingqian Zhang, and Guofan Jin, "Color separation of high-density dielectric rectangular grating in the Fresnel diffraction region," Appl. Opt. 51, 2172-2177 (2012)

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