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Determination of optical constants for cholesteric liquid crystal films by using transmittance and reflectance spectra

투과 및 반사 스펙트럼을 이용한 콜레스테릭 액정 필름의 광학 상수 결정

  • 박종락 (조선대학교 광기술공학과) ;
  • 류기한 (LG 전선주식회사 광통신연구소)
  • Published : 2004.02.01

Abstract

We have obtained optical constants for cholesteric liquid crystal (CLC) films by fitting theoretical spectra of transmittance and reflectance with measured ones. Berreman's 4${\times}$4 matrix approach was used for the calculation of theoretical spectra. The fitting method was applied to three samples with different reflection bands and fitted results of refractive indices for CLC samples were compared with measured ones for a parallel-aligned LC sample. It was found that the two results were in fairly good agreement within the error of the fitted results for the three CLC samples.

References

  1. Liquid Crystal Displays E.Lueder
  2. Reflective Liquid Crystal Displays S.T.Wu;D.K.Yang
  3. J. Opt. Soc. Am. A v.5 no.9 Faster 4 × 4 matrix method for uniaxial inhomogeneous media H.Wohler;G.Haas;M.Fritsch;D.A.Mlynski https://doi.org/10.1364/JOSAA.5.001554
  4. Optics of Liquid Crystal Displays P.Yeh;C.Gu
  5. IEEE J. Quantum Electron. v.24 no.11 Gain Squaring in a CnNd:GSGG Active-Mirror Amplifer Using a Choesteric Liquid Crystal Mirror J.C.Lee;J.H.Kelly;D.L.Smith;S.D.Jacobs https://doi.org/10.1109/3.8566
  6. 한국광학회지 v.11 no.2 콜레스테릭 액정 폴리머 박막을 이용한 광섬유 원편광 거울 제작 및 이를 이용한 모드 록킹된 광섬유 레이저 장도일;김경헌;김인선;김성태
  7. Opt. Commun. v.162 Short pulse generation in the mode-locked fibre laser using cholesteric liquid crystal D.I.Chang;H.Y.Kim;M.Y.Jeon;H.K.Lee;D.S.Lim;K.H.Kim;I.Kim;S.T.Kim https://doi.org/10.1016/S0030-4018(99)00062-0
  8. Mol. Cryst. And Liq. Cryst. v.11 Reflection and Transmission by Single-Domain Cholesteric Liquid Crystal Films: Theory and Verification D.W.Berreman;T.J.Scheffer https://doi.org/10.1080/15421407008083530
  9. Mastering MATLAB 6: A Comprehensive Tutorial and Reference D.Hanselman;B.Littlefield
  10. Phys. Rev. B v.34 no.10 Optical dispersion relations for amorphous semiconductors and amorphous dielectrics A.R.Forouhi;I.Bloomer https://doi.org/10.1103/PhysRevB.34.7018
  11. Opt. Lett. v.15 no.17 TEM$_{00}$-mode and single-lon-gitudinal-mode operation with a cholesteric liquid-crystal laser end mirror J.C.Lee;S.D.Jacobs;T.Gunderman;A.Schmid;T.J.Kessler;M.D.Skeldon https://doi.org/10.1364/OL.15.000959
  12. J. Appl. Phys. v.68 no.4 Elimination of the Fabry-Perot effect in the 4×4 matrix method for inhomogeneous uniaxial media K.H.Yang https://doi.org/10.1063/1.346632
  13. Phys. Rev. B v.38 no.3 Optical properties of crystalline semiconductors and dielectrics A.R.Forouhi;I.Bloomer https://doi.org/10.1103/PhysRevB.38.1865