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Birefringent omnidirectional reflector

机译:双折射全向反射器

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Anisotropic optical coatings offer unique polarizing properties, unmatched by conventional isotropic devices. Here we demonstrate the fabrication of a birefringent omnidirectional reflector, a type of photonic crystal, which exhibits complete reflection of radiation at 1.1 μm for all incidence angles and polarizations. The thin-film device was deposited from electron-beam evaporated silicon, with refractive-index variation arising from atomic-scale porosity created with glancing-angle deposition. Birefringence was found to enhance the performance of the device compared with its isotropic counterpart by enlarging the photonic bandgap region of omnidirectional reflection.
机译:各向异性光学涂料具有独特的偏振特性,这是传统各向同性设备无法比拟的。在这里,我们演示了一种双折射全向反射器(一种光子晶体)的制造,该反射器对于所有入射角和偏振都显示出1.1μm处的辐射完全反射。薄膜器件由电子束蒸发的硅沉积而成,其折射率变化是由掠射角沉积产生的原子级孔隙率引起的。通过扩大全向反射的光子带隙区域,发现双折射与其各向同性的器件相比可增强该器件的性能。

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