Oblique incidence and polarization orientation of the input beam have dramatic effects on the spectral response of coupled dielectric waveguide gratings. Coupled gratings with small periodic perturbations can be described as a problem of two coupled resonances at strictly normal incidence, but we find that the device involves four coupled resonances when oblique incidence and polarization effects are included in the analysis. Very small deviations from normal incidence change qualitatively the spectral response and four peaks are observed, whereas only two peaks are present at normal incidence. Polarization misalignments produce a decrease of the reflectance of the resonances at normal incidence, but a simultaneous shift of the spectral position of the peaks is observed at oblique incidence.

© 2012 OSA

1. A. Hessel and A. A. Oliner, “A new theory of Wood’s anomalies on optical gratings,” Appl. Opt.4(10), 1275–1297 (1965). [CrossRef]
2. S. S. Wang, R. Magnusson, J. S. Bagby, and M. G. Moharam, “Guided-mode resonances in planar dielectric-layer diffraction gratings,” J. Opt. Soc. Am. A7(8), 1470–1474 (1990). [CrossRef]
3. H. L. Bertoni, L. H. S. Cheo, and T. Tamir, “Frequency-selective reflection and transmission by a periodic dielectric layer,” IEEE Trans. Antenn. Propag.37(1), 78–83 (1989). [CrossRef]
4. S. Tibuleac, R. Magnusson, T. A. Maldonado, P. P. Young, and T. R. Holzheimer, “Dielectric frequency-selective structures incorporating waveguide gratings,” IEEE Trans. Microw. Theory Tech.48(4), 553–561 (2000). [CrossRef]
5. A. Coves, P. P. Garrido, B. Gimeno, and M. V. Andrés, “Filter response of resonant waveguide dielectric gratings at plane-wave conical incidence,” Prog. Electron. Res.95, 219–239 (2009). [CrossRef]
6. A. Sharon, D. Rosenblatt, A. A. Friesem, H. G. Weber, H. Engel, and R. Steingrueber, “Light modulation with resonant grating-waveguide structures,” Opt. Lett.21(19), 1564–1566 (1996). [CrossRef] [PubMed]
7. R. R. Boye, R. W. Ziolkowski, and R. K. Kostuk, “Resonant waveguide-grating switching device with nonlinear optical material,” Appl. Opt.38(24), 5181–5185 (1999). [CrossRef] [PubMed]
8. A. Mizutani, H. Kikuta, and K. Iwata, “Numerical study on an asymmetric guided-mode resonant grating with a Kerr medium for optical switching,” J. Opt. Soc. Am. A22(2), 355–360 (2005). [CrossRef] [PubMed]
9. Q. M. Ngo, S. Kim, S. H. Song, and R. Magnusson, “Optical bistable devices based on guided-mode resonance in slab waveguide gratings,” Opt. Express17(26), 23459–23467 (2009). [CrossRef] [PubMed]
10. S. Brand, R. A. Abram, and M. A. Kaliteevski, “Evanescently coupled interface states in the gap between two Bragg reflectors,” Opt. Lett.35(12), 2085–2087 (2010). [CrossRef] [PubMed]
11. H. Y. Song, S. Kim, and R. Magnusson, “Tunable guided-mode resonances in coupled gratings,” Opt. Express17(26), 23544–23555 (2009). [CrossRef] [PubMed]
12. W. Nakagawa and Y. Fainman, “Tunable optical nanocavity based on modulation of near-field coupling between subwavelength periodic nanostructures,” IEEE J. Sel. Top. Quantum Electron.10(3), 478–483 (2004). [CrossRef]
13. A. Coves, B. Gimeno, A. A. San Blas, A. Vidal, V. E. Boria, and M. V. Andrés, “Three-dimensional scattering of dielectric gratings under plane-wave excitation,” IEEE Antennas Wirel. Propag. Lett.2(1), 215–218 (2003). [CrossRef]
14. A. Coves, B. Gimeno, J. Gil, M. V. Andrés, A. A. San Blas, and V. E. Boria, “Full-wave analysis of dielectric frequency-selective surfaces using a vectorial modal method,” IEEE Trans. Antenn. Propag.52(8), 2091–2099 (2004). [CrossRef]
15. W. P. Huang, “Coupled-mode theory for optical waveguides: an overview,” J. Opt. Soc. Am. A11(3), 963–983 (1994). [CrossRef]

Appl. Opt.

• A. Hessel and A. A. Oliner, “A new theory of Wood’s anomalies on optical gratings,” Appl. Opt.4(10), 1275–1297 (1965). [CrossRef]
• R. R. Boye, R. W. Ziolkowski, and R. K. Kostuk, “Resonant waveguide-grating switching device with nonlinear optical material,” Appl. Opt.38(24), 5181–5185 (1999). [CrossRef] [PubMed]

IEEE Antennas Wirel. Propag. Lett.

• A. Coves, B. Gimeno, A. A. San Blas, A. Vidal, V. E. Boria, and M. V. Andrés, “Three-dimensional scattering of dielectric gratings under plane-wave excitation,” IEEE Antennas Wirel. Propag. Lett.2(1), 215–218 (2003). [CrossRef]

IEEE J. Sel. Top. Quantum Electron.

• W. Nakagawa and Y. Fainman, “Tunable optical nanocavity based on modulation of near-field coupling between subwavelength periodic nanostructures,” IEEE J. Sel. Top. Quantum Electron.10(3), 478–483 (2004). [CrossRef]

IEEE Trans. Antenn. Propag.

• A. Coves, B. Gimeno, J. Gil, M. V. Andrés, A. A. San Blas, and V. E. Boria, “Full-wave analysis of dielectric frequency-selective surfaces using a vectorial modal method,” IEEE Trans. Antenn. Propag.52(8), 2091–2099 (2004). [CrossRef]
• H. L. Bertoni, L. H. S. Cheo, and T. Tamir, “Frequency-selective reflection and transmission by a periodic dielectric layer,” IEEE Trans. Antenn. Propag.37(1), 78–83 (1989). [CrossRef]

IEEE Trans. Microw. Theory Tech.

• S. Tibuleac, R. Magnusson, T. A. Maldonado, P. P. Young, and T. R. Holzheimer, “Dielectric frequency-selective structures incorporating waveguide gratings,” IEEE Trans. Microw. Theory Tech.48(4), 553–561 (2000). [CrossRef]

J. Opt. Soc. Am. A

• S. S. Wang, R. Magnusson, J. S. Bagby, and M. G. Moharam, “Guided-mode resonances in planar dielectric-layer diffraction gratings,” J. Opt. Soc. Am. A7(8), 1470–1474 (1990). [CrossRef]
• A. Mizutani, H. Kikuta, and K. Iwata, “Numerical study on an asymmetric guided-mode resonant grating with a Kerr medium for optical switching,” J. Opt. Soc. Am. A22(2), 355–360 (2005). [CrossRef] [PubMed]
• W. P. Huang, “Coupled-mode theory for optical waveguides: an overview,” J. Opt. Soc. Am. A11(3), 963–983 (1994). [CrossRef]

Opt. Express

• H. Y. Song, S. Kim, and R. Magnusson, “Tunable guided-mode resonances in coupled gratings,” Opt. Express17(26), 23544–23555 (2009). [CrossRef] [PubMed]
• Q. M. Ngo, S. Kim, S. H. Song, and R. Magnusson, “Optical bistable devices based on guided-mode resonance in slab waveguide gratings,” Opt. Express17(26), 23459–23467 (2009). [CrossRef] [PubMed]

Opt. Lett.

• S. Brand, R. A. Abram, and M. A. Kaliteevski, “Evanescently coupled interface states in the gap between two Bragg reflectors,” Opt. Lett.35(12), 2085–2087 (2010). [CrossRef] [PubMed]
• A. Sharon, D. Rosenblatt, A. A. Friesem, H. G. Weber, H. Engel, and R. Steingrueber, “Light modulation with resonant grating-waveguide structures,” Opt. Lett.21(19), 1564–1566 (1996). [CrossRef] [PubMed]

Prog. Electron. Res.

• A. Coves, P. P. Garrido, B. Gimeno, and M. V. Andrés, “Filter response of resonant waveguide dielectric gratings at plane-wave conical incidence,” Prog. Electron. Res.95, 219–239 (2009). [CrossRef]

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