22 September 1995 Binary subwavelength grating with dynamic subperiod
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The discussion on binary subwavelength gratings has recently been increased due to its simple fabrication procedure and potential applications in a variety of optoelectronic fields. Most designs of binary subwavelength gratings have been confined in the way that the grating ridges and/or channels are chirped and the defined grating period does not change during the design process. For some applications (e.g. interconnections), however, a dynamic diffraction pattern may be more desirable. In these cases, the variation of the diffraction angle and/or multiple diffraction beam pattern may be required. Therefor the rearrangement of the grating ridges and/or channels becomes a necessary. The newly arranged profile of the grating ridges and/or channels may be total different from the original one and may need to be changed into another profile later. This paper proposes a design method which optimize the diffraction efficiency at a desired angle and/or optimize the diffraction efficiencies at a multiangle pattern by forming a dynamic 'subperiod' within the initial defined grating period. Some design examples have been provided to prove the design concept.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zhiping James Zhou, "Binary subwavelength grating with dynamic subperiod", Proc. SPIE 2532, Application and Theory of Periodic Structures, (22 September 1995); doi: 10.1117/12.221251; https://doi.org/10.1117/12.221251

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