Tunable, polarization independent, narrow-band filtering with one-dimensional crossed resonant gratings.

We propose an optical component for widely tunable, narrow-band filtering. It takes advantage of the tunability properties, with respect to the angle of incidence, of guided-mode resonance filters. The intrinsic polarization sensitivity of the resonances is suppressed by exciting the modes through two identical, differently oriented one-dimensional gratings flanking a thick substrate. An example is provided that theoretically shows a polarization independent peak at 1.6 μm with a Q factor of 13,000 and a reflectivity greater than 99% at resonance, which is tunable over 100 nm. Finally, we discuss the fabrication limitations and conclude that the proposed configuration is realistic.

[1]  Daniel Maystre,et al.  Theoretical Study of the Anomalies of Coated Dielectric Gratings , 1986 .

[2]  Role of photonic bandgaps in polarization-independent grating waveguide structures. , 2008, Journal of the Optical Society of America. A, Optics, image science, and vision.

[3]  Lifeng Li,et al.  New formulation of the Fourier modal method for crossed surface-relief gratings , 1997 .

[4]  H. Kikuta,et al.  Nonpolarizing guided-mode resonant grating filter for oblique incidence. , 2001, Journal of the Optical Society of America. A, Optics, image science, and vision.

[5]  Sun Tian-yu,et al.  Polarization-Independent Guided-Mode Resonance Filters under Oblique Incidence , 2010 .

[6]  A. Friesem,et al.  Resonant grating waveguide structures , 1997 .

[7]  Anne Sentenac,et al.  Experimental demonstration of ultrasharp unpolarized filtering by resonant gratings at oblique incidence. , 2009, Journal of the Optical Society of America. A, Optics, image science, and vision.

[8]  Tina Clausnitzer,et al.  Narrowband, polarization-independent free-space wave notch filter. , 2005, Journal of the Optical Society of America. A, Optics, image science, and vision.

[9]  Anne Sentenac,et al.  Study of waveguide grating eigenmodes for unpolarized filtering applications. , 2003, Journal of the Optical Society of America. A, Optics, image science, and vision.

[10]  Dominique Lacour,et al.  Polarization independence of a one-dimensional grating in conical mounting. , 2003, Journal of the Optical Society of America. A, Optics, image science, and vision.

[11]  Anne Sentenac,et al.  Phenomenological theory of filtering by resonant dielectric gratings. , 2002, Journal of the Optical Society of America. A, Optics, image science, and vision.

[12]  Wataru Nakagawa,et al.  Design and characterization of a tunable polarization-independent resonant grating filter. , 2005, Optics express.

[13]  Bo Fu,et al.  Analysis of MCP gain selection for underwater range-gated imaging applications based on ICCD , 2010 .

[14]  Jianda Shao,et al.  Nonpolarizing guided-mode resonance filter. , 2009, Optics letters.

[15]  A F Goetz,et al.  Imaging Spectrometry for Earth Remote Sensing , 1985, Science.