Bypassing and cutting through 1D photonic crystals by ultra-shallow wet-etched resonant gratings |
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Authors: | Svetlen Tonchev Olivier Parriaux |
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Institution: | 1. University of Lyon, Lab. H. Curien UMR CNRS 5516, F-42000 Saint-Etienne, France;2. Institute of Solid State Physics, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria |
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Abstract: | The electromagnetic field in subwavelength resonant diffractive optical elements is so concentrated that a very shallow surface corrugation obtained by wet chemical micro–nano-etching is sufficient to give rise to high contrast diffraction effects allowing a high wavelength-, polarization- or transverse-mode-selectivity which is not achievable by conventional diffractive elements. Two examples of polarizing laser mirrors at both extremes of the optical spectrum with wet-etched grating bypassing and cutting through the 1D photonic crystal are demonstrated. |
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