Electromagnetic analysis of diffractive lens with C method and local linear grating model

Kai Xiao; Ying Liu; Shaojun Fu

doi:10.1117/12.573324

7 February 2005 Electromagnetic analysis of diffractive lens with C method and local linear grating model

Kai Xiao, Ying Liu, Shaojun Fu

Proceedings Volume 5636, Holography, Diffractive Optics, and Applications II; (2005) https://doi.org/10.1117/12.573324
Event: Photonics Asia, 2004, Beijing, China

Abstract

The electromagnetic theory should be applied to determine the diffraction efficiency of structures whose minimum line width is comparable with wavelength or the grooves are too deep, where scalar theory is no longer useful. The coordinate transformation method (the C method) is a very efficient method for obtaining continuous surface-relief grating efficiency for both TE and TM polarization. The local linear grating model (LLGM) models 2-D circular diffractive lens with combination of a series of local linear gratings. We synthesized and analyzed circular diffractive lens with a continuous profile not as previous authors who always use multi-lever structures. The result is compared with that of scalar theory and analysis using LLGM and rigorous coupled-wave theory. This optimization can be used as a complement of the scalar design of diffractive lens.

Citation Download Citation

Kai Xiao, Ying Liu, and Shaojun Fu "Electromagnetic analysis of diffractive lens with C method and local linear grating model", Proc. SPIE 5636, Holography, Diffractive Optics, and Applications II, (7 February 2005); https://doi.org/10.1117/12.573324

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KEYWORDS

Diffraction gratings

Diffraction

Electromagnetism

Electromagnetic theory

Lens design

Polarization

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