Takahashi S, Tandaechanurat A, Igusa R, Ota Y, Tatebayashi J, Iwamoto S, Arakawa Y
Opt Express. 2013 Dec 2;21(24):29905-13. doi: 10.1364/OE.21.029905.
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 ∼ 23° at 1.3 μm wavelength for a single helical unit.
在基于半导体的三维手性光子晶体（PhC）中，于电信波长下通过实验证明了旋光性。我们设计了一种旋转堆叠的木堆PhC结构，其中相邻层旋转45°，四层构成一个单一的螺旋单元。由具有亚微米周期性的砷化镓制成的镜面对称PhC通过微操纵技术制造。入射到该结构上的线偏振光在传输过程中会发生旋光。所得结果与数值模拟结果吻合良好。测量表明，对于单个螺旋单元，在1.3μm波长处获得的最大旋光角高达约23°。
