Demonstration of polarization-independent resonant subwavelength grating filter arrays
Optics Letters, Vol. 35, Issue 19, pp. 3201-3203 (2010)
http://dx.doi.org/10.1364/OL.35.003201
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Abstract
We demonstrate a two-dimensional (2D) polarization-independent resonant subwavelength grating (RSG) in a filter array. RSGs, also called guided mode resonant filters, are traditionally one-dimensional gratings; however, this leads to TE and TM resonances at different wavelengths and with different spectral shape. A 2D grating can remove the polarization dependence at normal incidence, while maintaining the desirable RSG properties of high reflectivity, narrow passband, and low sidebands without ripple. We designed and fabricated 2D gratings with near-identical responses for both polarizations at normal incidence in the telecommunication band. Ninety percent reflectivity is achieved at the resonant wavelengths.
© 2010 Optical Society of America
OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(230.1950) Optical devices : Diffraction gratings
(050.6624) Diffraction and gratings : Subwavelength structures
(230.7408) Optical devices : Wavelength filtering devices
ToC Category:
Diffraction and Gratings
History
Original Manuscript: July 23, 2010
Revised Manuscript: August 30, 2010
Manuscript Accepted: September 1, 2010
Published: September 21, 2010
Citation
D. W. Peters, R. R. Boye, J. R. Wendt, R. A. Kellogg, S. A. Kemme, T. R. Carter, and S. Samora, "Demonstration of polarization-independent resonant subwavelength grating filter arrays," Opt. Lett. 35, 3201-3203 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-19-3201
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