Definition
Birefringence is a phenomenon to cause two refracted rays of light when a ray of light enters an optically anisotropic material. The two rays are, respectively, called the ordinary ray and the extraordinary ray, and their polarizations are orthogonal. Birefringence of polymer is often measured as difference between refractive indices for the two rays. Birefringence of polymers should be controlled for some photonic devices.
Introduction
A polymer molecular chain has a polarizability anisotropy originated from its three-dimensional chemical structure. In completely amorphous state, polarizability anisotropies for repeating units are compensated by each other because the polymer molecular chains are randomly oriented. As a result, the polymer macroscopically becomes optically isotropic and exhibits no birefringence. The polymer, however, exhibits birefringence when the polymer molecular chains are oriented by stress....
References
Doi M, Edwards SF (1986) The theory of polymer dynamics. Oxford Science, New York
Tagaya A, Koike Y (2012) Compensation and control of the birefringence of polymers for photonics. Polym J 44:306–314
Born M, Wolf E (2002) Principles of optics, 7th (expanded) edn. Cambridge University Press, Rochester
Sata H, Masahiko M, Shimamoto S (2004) Properties and applications of cellulose triacetate film. Macromol Symp 208:323–333
Hahn BR, Wendorff JH (1985) Compensation method for zero birefringence in oriented polymers. Polymer 26:1619–1622
Iwata S, Tsukahara H, Nihei E, Koike Y (1996) Compensation for birefringence of oriented polymers by random copolymerization method. Jpn J Appl Phys 35:3896–3901
Iwata S, Tsukahara H, Nihei E, Koike Y (1997) Transparent zero-birefringence copolymer and its optical properties. Appl Opt 36:4549–4555
Tagaya A, Iwata S, Kawanami E, Tsukahara H, Koike Y (2001) Zero-birefringence polymer by the anisotropic molecule dope method. Appl Opt 40:3677–3683
Tagaya A, Iwata S, Kawanami E, Tsukahara H, Koike Y (2001) Anisotropic molecule dopant method for synthesizing a zero-birefringence polymer. Jpn J Appl Phys 40:6117–6123
Tagaya A, Ohkita H, Mukoh M, Sakaguchi R, Koike Y (2003) Compensation of the birefringence of a polymer by a birefringent crystal. Science (Washington, DC) 301:812–814
Yeh P, Gu C (2010) Optics of liquid crystal displays, 2nd edn. Wiley, Hoboken
Mori H, Nagai M, Nakayama H, Itoh Y, Kamada K, Arakawa K, Kawata K (2003) Novel optical compensation method based upon a discotic optical compensation film for wide-viewing-angle LCDs. SID’03 Digest 1058–1061
Uchiyama A, Ono Y, Ikeda Y, Shuto H, Yahata K (2012) Copolycarbonate optical films developed using birefringence dispersion control. Polym J 44:995–1008
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Tagaya, A. (2013). Birefringence of Polymer. In: Kobayashi, S., Müllen, K. (eds) Encyclopedia of Polymeric Nanomaterials. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-36199-9_116-1
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DOI: https://doi.org/10.1007/978-3-642-36199-9_116-1
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