Bachman K A, Peltzer J J, Flammer P D, Furtak T E, Collins R T, Hollingsworth R E
Department of Physics, Colorado School of Mines, Golden, CO 80401, USA.
Opt Express. 2012 Jan 16;20(2):1308-19. doi: 10.1364/OE.20.001308.
We present simulation and experimental results for easily fabricated spiral plasmonic antenna analogues providing circular polarization selectivity. One circular polarization state is concentrated and transmitted through a subwavelength aperture, while the opposite circular state is blocked. The spectral bandwidth, efficiency, and extinction ratios are tunable through geometric parameters. Integration of such structures onto a focal plane array in conjunction with linear micropolarizers enables complete Stokes vector imaging, that, until now, has been difficult to achieve. An array of these structures forms a plasmonic metamaterial that exhibits high circular dichroism.
我们展示了易于制造的提供圆偏振选择性的螺旋等离子体天线类似物的模拟和实验结果。一种圆偏振状态被集中并通过亚波长孔径传输，而相反的圆偏振状态被阻挡。光谱带宽、效率和消光比可通过几何参数进行调节。将此类结构与线性微偏振器集成到焦平面阵列上可实现完整的斯托克斯矢量成像，而这在目前一直难以实现。这些结构的阵列形成了一种具有高圆二色性的等离子体超材料。
