IEEE Photonics Journal | |
New Nonpolarizing Resonant Beam Splitters | |
Mehrdad Shokooh-Saremi1  Robert Magnusson2  | |
[1] Department of Electrical Engineering, University of Texas at Arlington, Arlington, TX, USA;Dept. of Electr. Eng., Univ. of Texas at Arlington, Arlington, TX, USA; | |
关键词: Guided-mode resonance; leaky-mode resonance; particle swarm optimization; beam splitters; | |
DOI : 10.1109/JPHOT.2010.2057502 | |
来源: DOAJ |
【 摘 要 】
We present wideband nonpolarizing beam splitters (NPBSs) for the telecommunication C-band. We show that silicon-on-insulator subwavelength periodic elements operating near leaky-mode resonance provide useful spectral expressions enabling effective beam division. Particle swarm optimization is the design method of choice. Periodic single-layer and multilevel NPBSs are provided exhibiting ~50/50 beam ratio under oblique and normal incidence. We compare the spectral performance of the beam splitters with that of their thin-film effective-medium counterparts, thereby verifying the resonance-mediated origin of the spectra sought. The beam splitters are found to be reasonably tolerant to deviations in angle of incidence and structural parameters.
【 授权许可】
Unknown