Open AccessDouble groove broadband gratings
Author(s) -
Juha Pietarinen,
Tuomas Vallius
Publication year - 2008
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.013824
Subject(s) - optics , wavelength , refractive index , diffraction efficiency , diffraction grating , materials science , diffraction , groove (engineering) , broadband , optoelectronics , physics , metallurgy
Waveguiding in periodical structures of the size of the wavelength is applied to increase the functional spectral band of diffractive optics. The deviation of the effective refractive index between waveguides as a function of the wavelength is utilized to compensate the strong wavelength dependence of the efficiency of diffraction gratings.