Waveguide Coupling via Magnetic Gratings with Effective Strips
Department of Physics and Advance Materials Manufacturing Processing Institute, University of North Texas, Denton, TX 76203, USA
UES, Inc., 4401 Dayton-Xenia Rd, Dayton, OH 45432, USA
Air Force Research Lab, Materials and Manufacturing Directorate, 3005 Hobson Way, Wright Patterson AFB, Dayton, OH 45433, USA
Sensor Science Division, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899, USA
Center of Photonics & Quantum Materials, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia
Author to whom correspondence should be addressed.
Received: 20 February 2018 / Revised: 9 April 2018 / Accepted: 10 April 2018 / Published: 14 April 2018
Gratings with complex multilayer strips are studied under inclined incident light. Great interest in these gratings is due to applications as input/output tools for waveguides and as subwavelength metafilms. The structured strips introduce anisotropy in the effective parameters, providing additional flexibility in polarization and angular dependences of optical responses. Their characterization is challenging in the intermediate regime between subwavelength and diffractive modes. The transition between modes occurs at the Wood’s anomaly wavelength, which is different at different angle of incidence. The usual characterization with an effective film using permittivity
has limited effectiveness at normal incidence but does not apply at inclined illumination, due to the effect of periodicity. The optical properties are better characterized with effective medium strips instead of an effective medium layer to account for the multilayer strips and the underlying periodic nature of the grating. This approach is convenient for describing such intermediate gratings for two types of applications: both metafilms and the coupling of incident waves to waveguide modes or diffraction orders. The parameters of the effective strips are retrieved by matching the spectral-angular map at different incident angles.
This is an open access article distributed under the Creative Commons Attribution License
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
Share & Cite This Article
MDPI and ACS Style
Roccapriore, K.M.; Lyvers, D.P.; Brown, D.P.; Poutrina, E.; Urbas, A.M.; Germer, T.A.; Drachev, V.P. Waveguide Coupling via Magnetic Gratings with Effective Strips. Appl. Sci. 2018, 8, 617.
Roccapriore KM, Lyvers DP, Brown DP, Poutrina E, Urbas AM, Germer TA, Drachev VP. Waveguide Coupling via Magnetic Gratings with Effective Strips. Applied Sciences. 2018; 8(4):617.
Roccapriore, Kevin M.; Lyvers, David P.; Brown, Dean P.; Poutrina, Ekaterina; Urbas, Augustine M.; Germer, Thomas A.; Drachev, Vladimir P. 2018. "Waveguide Coupling via Magnetic Gratings with Effective Strips." Appl. Sci. 8, no. 4: 617.
Show more citation formats
Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
[Return to top]
For more information on the journal statistics, click here
Multiple requests from the same IP address are counted as one view.