24 June 2002 Layered and continuous handed materials for chiral optics
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Thin film optical materials deposited with a helical nanostructure can be used to fabricate devices that respond differently to right-handed and left-handed circularly polarized light. Together these inorganic materials and devices promise the framework of chiral optics, in which the basic polarization states of propagating light are circular. In the presentation we show that one period of a continuous chiral material can be replaced with three or more sub- layers of oriented biaxial material, and compare the performance that is expected of elements and devices such mirrors, spacerless spectral-hole filters and circularly polarized lasers that use continuous and layered chiral materials respectively. The investigation shows that, for the same number of turns and local linear birefringence, the performance of the layered material is slightly poorer than that of the continuos material. However, in practice the small loss in performance of the layered chiral material may be offset by inherently larger local linear birefringence and improved structural fidelity due to superiority of optical monitoring over quartz-crystal monitoring.
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Ian J. Hodgkinson, Qihong Wu, Lakshman de Silva, "Layered and continuous handed materials for chiral optics", Proc. SPIE 4806, Complex Mediums III: Beyond Linear Isotropic Dielectrics, (24 June 2002); doi: 10.1117/12.472976; https://doi.org/10.1117/12.472976

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