Giant optical rotation in a three-dimensional semiconductor chiral photonic crystal.
Opt Express
; 21(24): 29905-13, 2013 Dec 02.
Article
em En
| MEDLINE
| ID: mdl-24514541
ABSTRACT
Optical rotation is experimentally demonstrated in a semiconductor-based three-dimensional chiral photonic crystal (PhC) at a telecommunication wavelength. We design a rotationally-stacked woodpile PhC structure, where neighboring layers are rotated by 45° and four layers construct a single helical unit. The mirror-asymmetric PhC made from GaAs with sub-micron periodicity is fabricated by a micro-manipulation technique. The linearly polarized light incident on the structure undergoes optical rotation during transmission. The obtained results show good agreement with numerical simulations. The measurement demonstrates the largest optical rotation angle as large as â¼ 23° at 1.3 µm wavelength for a single helical unit.
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MEDLINE
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En
Ano de publicação:
2013
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Article