2 August 2004 Threaded-chiral media: reflectors for elliptically polarized light
Author Affiliations +
Effective medium theory is applied to nanoengineered inorganic coatings in which a primary chiral medium (A) threads through a second medium (B) that may be isotropic, birefringent or chiral. In general A and B are represented by thin locally-birefringent layers with axes that rotate through the thickness of the coating. Local properties of the complex medium are represented by a Herpin birefringent period (A/2)B(A/2), with effective principal refractive indices and with thickness much less than the chiral period. The effect of changing the fraction fB of material B is considered. With simplicity of fabrication in mind, the special case in which A and B are identical apart from thickness and azimuthal orientation is developed. Then, by maintaining a constant optical thickness for the Herpin period, the circular Bragg resonant wavelength of the primary medium can be retained. As an example of the potential use of threaded-chiral materials, handed resonant reflectors for elliptically-polarized light are considered.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ian J. Hodgkinson, Ian J. Hodgkinson, Qi Hong Wu, Qi Hong Wu, Lakshman De Silva, Lakshman De Silva, Matthew Arnold, Matthew Arnold, } "Threaded-chiral media: reflectors for elliptically polarized light", Proc. SPIE 5508, Complex Mediums V: Light and Complexity, (2 August 2004); doi: 10.1117/12.559144; https://doi.org/10.1117/12.559144

Back to Top