Journal
APPLIED PHYSICS LETTERS
Volume 105, Issue 5, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4892430
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- Project for Developing Innovation Systems of MEXT
- JSPS through FIRST Program
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Circular dichroism covering the telecommunication band is experimentally demonstrated in a semiconductor-based three-dimensional chiral photonic crystal (PhC). We design a rotationally stacked woodpile PhC structure where neighboring layers are rotated by 60 degrees and three layers construct a single helical unit. The mirror-asymmetric PhC made from GaAs with sub-micron periodicity is fabricated by a micro-manipulation technique. Due to the large contrast of refractive indices between GaAs and air, the experimentally obtained circular dichroism extends over a wide wavelength range, with the transmittance of right-handed circularly polarized incident light being 85% and that of left-handed light being 15% at a wavelength of 1.3 mu m. The obtained results show good agreement with numerical simulations. (C) 2014 AIP Publishing LLC.
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