Analysis of Anisotropic Diffraction in Volume Gratings Using Liquid Crystal Composites
A micro-periodic structure composed of polymer and liquid crystal(LC)phases is called holographic polymer dispersed liquid crystal(HPDLC)grating.The HPDLC grating has been applied for grating formation to obtain both high optical efficiency and electric switching function.Moreover,HPDLC grating shows polarization dependence in diffraction efficiencies against the incident polarization state of laser light.The anisotropic diffraction is modulated by the distribution of submicrometer-scale liquid crystal(LC)droplet in a polymer matrix using in terferometric laser exposure.The refractive-index modulations(n1x; n1y; n1z)in grating medium corresponding to the three dimensional directions are obtained by applying theoretical calculation based on the anisotropy for the experimental results of angular dependence of diffraction efficiencies in various grating structures.Our analysis shows that the diffraction efficiency and the characteristic ratio of diffraction efficiency in polarization parallel to the grating vector to that in polarization perpendicular to the grating vector are markedly affected by the refractive-index modulations.
A.Ogiwara H.Shichi H.Kakiuchida A.Emoto H.Ono
Department of Electronic Engineering,Kobe City College of Technology,Japan Materials Research Institute for Sustainable Development National Institute of Advanced Industrial S Electronics and Photonics Research Institute National Institute of Advanced Industrial Science and T Department of Electrical Engineering,Nagaoka University of Technology,Japan
国际会议
Progress in Electromagnetics Research Symposium 2013(2013年电磁学研究新进展学术研讨会)
台北
英文
317-321
2013-03-01（万方平台首次上网日期，不代表论文的发表时间）