Layered and continuous handed materials for chiral optics

被引:5
作者
Hodgkinson, IJ [1 ]
Wu, AH [1 ]
De Silva, L [1 ]
机构
[1] Univ Otago, Dept Phys, Dunedin, New Zealand
来源
COMPLEX MEDIUMS III: BEYOND LINEAR ISOTROPIC DIELECTRICS | 2002年 / 4806卷
关键词
birefringence; chiral films; chiral reflectors; nanostructure; polarization; thin films;
D O I
10.1117/12.472976
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
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 continuous 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.
引用
收藏
页码:118 / 128
页数:11
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