Design, fabrication, and measurement of giant birefringence at telecommunications wavelengths in multi-slotted silicon nanophotonic optical waveguides
نویسندگان
چکیده
Giant optical birefringence has been demonstrated in multilayer polymeric thin films (delta_n=0.3), in nanostructured silicon (delta_n=0.3) and in semiconductor nanowires (delta_n=0.8). In chip-scale waveguides at telecommunications-related wavelengths (1550 nm), giant birefringence has also been observed in the silicon-air slot waveguide (delta_n=0.7). Here, we demonstrate record giant birefringence (delta_n=1.5) over 60 nm of bandwidth near lambda=1550 nm in a multi-slotted silicon nanophotonic waveguide. For the first time, the measured birefringence spans a full octave (nTE = 2×nTM).
منابع مشابه
Giant birefringence in multi-slotted silicon nanophotonic waveguides.
We demonstrate record giant birefringence, nearly twice as large as has previously been achieved (Delta n(group) = 1.5 over more than 60 nm of bandwidth near lambda= 1550 nm) using a multi-slotted silicon nanophotonic waveguide. The birefringence is optimized by the use of materials with high refractive index contrast to create a compact single-mode waveguide, and the etching of deeply sub-wave...
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