Circular dichroism in a three-dimensional semiconductor chiral photonic crystal

S. Takahashi, T. Tajiri, Y. Ota, J. Tatebayashi, S. Iwamoto, Y. Arakawa

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

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° 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 μ m. The obtained results show good agreement with numerical simulations.

Original languageEnglish
Article number051107
JournalApplied Physics Letters
Volume105
Issue number5
DOIs
Publication statusPublished - 2014 Aug 4
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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