Open AccessDesign of polarization gratings for broadband illumination
Author(s) -
Hanna Lajunen,
Jari Turunen,
Jani Tervo
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.003055
Subject(s) - optics , broadband , polarization (electrochemistry) , wavelength , diffraction , planar , paraxial approximation , dielectric , diffraction efficiency , physics , diffraction grating , optoelectronics , materials science , computer science , beam (structure) , chemistry , computer graphics (images)
Design of broadband diffractive elements is studied. It is shown that dielectric polarization gratings can be made to perform the same optical function over a broad band of wavelengths. Any design of paraxial-domain diffractive elements can be realized as such broadband elements that may, e.g., give constant diffraction efficiencies over the wavelength band while the field propagation after the elements remains wavelength-dependent. Furthermore, elements producing symmetric signals are shown to work with arbitrarily polarized or partially polarized incident planar broadband fields. The performance of the elements is illustrated by numerical examples and some practical issues related to their fabrication are discussed.