| 研究生: |
陳光豪 Chen, Guang-Hao |
|---|---|
| 論文名稱: |
雙光子效應於染料摻雜膽固醇液晶薄膜之研究與其雷射引致雙光子光柵之應用 Biphotonic effect and its applications of laser-induced biphotonic gratings in dye-doped cholesteric liquid crystal films |
| 指導教授: |
李佳榮
Lee, Chia-Rong |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 光電科學與工程研究所 Institute of Electro-Optical Science and Engineering |
| 論文出版年: | 2007 |
| 畢業學年度: | 95 |
| 語文別: | 中文 |
| 論文頁數: | 103 |
| 中文關鍵詞: | 偶氮染料 、同素異構化 、膽固醇 、雙光子 、液晶 |
| 外文關鍵詞: | azo-dye, isomerization, liquid crystal, biphotonic, cholesteric |
| 相關次數: | 點閱:75 下載:1 |
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本論文主要研究摻雜偶氮染料之膽固醇液晶薄膜在雙光子效應下產生可利用光做為開關之光柵。雙光子效應主要是由一道圓偏振的綠光及兩道同調的線偏振紅光產生干涉場所引致的。而能夠產生雙光子光柵的主要機制,起因於綠光會引致染料經過trans → cis同素異構化反應帶動液晶旋轉至波的行進方向,紅光則引致染料經過cis → trans反同素異構化反應來抑制染料旋轉,這樣的結果使得液晶分子趨向homeotropic及planar結構的週期性分佈,分別在紅光干涉場弱光區及強光區,進而產生光柵。此外,偶氮染料的濃度、分子結構及綠光、紅光強度的不同都會影響光柵繞射的表現。
In this thesis, we studied the optically switchable biphotonic gratings(BGs)based on the biphotonic effect in dye-doped cholesteric liquid crystal (DDCLC) films. The biphotonic effect was induced by applying one circularly-polarized green beam and the interference field that is generated by two coherent linearly-polarized red beams. The mechanisms to form the biphotonic gratings were the green-beam-induced dye-reorientation in the direction of the wave vector through the trans→cis isomerization and red-beam-induced suppression of dye-reorientation by cis→trans back-isomerization. These mechanisms result in the spatially periodic distribution with homeotropiclike and planarlike structures, respectively, in the dark and bright regions of the red interfering pattern, generating the BGs. Additionally, the diffracted performance of the BGs significantly depends on the relative intensity of the green and red beams, and type and concentration of the dye dopant.
〔1〕Masahiko HARA﹐Seiji ICHIKAWA﹐Hideo TAKEZOE﹐Atsuo
FUKUDA﹐Jpn. J. Appl. Phys.﹐23﹐1420(1984).
〔2〕Masahiko HARA﹐Hideo TAKEZOE﹐Atsuo FUKUDA﹐Jpn. J.
Appl. Phys.﹐25﹐1756(1986).
〔3〕I. Janossy﹐A. D. Lloyd﹐B. S. Wherrett﹐Mol. Crys. &
Liq. Cryst.﹐179﹐1(1990).
〔4〕I. Janossy﹐L. Csillag﹐A. D. Lloyd﹐Phys. Rev. A﹐
44﹐8410(1991).
〔5〕W. M. Gibbons﹐P. J. Shannon﹐S. T. Sun﹐B. J.
Swetlin﹐Nature﹐351﹐49(1991).
〔6〕I. Janossy﹐T. Kosa﹐Opt. Lett.﹐17﹐1183(1992).
〔7〕G. S. Chen﹐D. J. Brady﹐Opt. Lett.﹐17﹐1231(1992).
〔8〕A. G. Chen﹐D. J. Brady﹐Opt. Lett.﹐17﹐441(1992).
〔9〕I. C. Khoo﹐Hong Li﹐Yu Liang﹐IEEEE Journal of
Quantum Electronic﹐29﹐1444(1993).
〔10〕P. G. de Gennes and J. Prost﹐The Physics of Liquid
Crystals﹐2nded.﹐Clarendon Press﹐Oxford(1993).
〔11〕Tsung-Hsien Lin and Andy Y.-G. Fuh﹐Appl. Phys.
Lett. 87, 011106 (2005).
〔12〕Tsung-Hsien Lin and Andy Y.-G. Fuh﹐Proc. SPIE 6487,
64870E (2007).
〔13〕B. Bahoadur﹐Liquid Crystals-Applications and Uses﹐
World Scientific Press﹐Singapore(1990).
〔14〕I. C. Khoo﹐S. T. Wu﹐“Optics and Nonlinear Optics
of Liquid Crystals”﹐World Scientific﹐(1993)﹐
Chap. 2.
〔15〕Data sheet from ROCHE Co. “How to dope liquid
crystal mixtures”.
〔16〕Andrew J. Lovinger﹐Karl R. Amundson and Don D.
Davis﹐Chem. Mater. 6﹐1726(1994).
〔17〕Grant R. Fowles﹐Introduction to Modern Optics﹐
2nded.﹐University of Utah﹐New York(1975).
〔18〕Iam-Choon Khoo﹐“Liquid Crystals-Physical
Properties and Nonlinear Optical Phenomena” John
Wiley & Sons Press﹐New York(1995).
〔19〕C. W. Oseen, Trans. Faraday Soc. 29﹐883(1933).
〔20〕H. Zocher, Trans. Faraday Soc. 29﹐19(1933).
〔21〕F. C. Frank, Discuss. Faraday Soc. 25﹐19(1958).
〔22〕H. Kozawaguchi and M. Wada﹐Mol. Crys. Liq. Crys.
45﹐55(1978).
〔23〕P. G. de Gennes﹐Sol. State Commun. 6﹐163(1968).
〔24〕R. B. Meyer﹐Appl. Phys. Lett. 12﹐281(1968).
〔25〕I. Janossy and A.D. Lloyd﹐Mol. Cryst. Liq. Cryst.
203﹐74(1991).
〔26〕T. V. Galstyan﹐B. Saad﹐M. M. Denariez-Roberge﹐J.
Chem. Phys﹐107﹐9319(1997).
〔27〕T. V. Galstyan﹐V. Drnoyan﹐S. M. Arakelian﹐Phys.
Lett. A﹐217﹐52(1996).
〔28〕Nirmal K. Viswanathan﹐Srinivasan Balasubramanian
Jpn. J. Appl. Phys. Vol.38(1999)Part1﹐No. 10.
〔29〕Lasers and Holography﹐edited by P. C. Mehta and V.
V. Rampal﹐World Scientific﹐Singapore(1993).
〔30〕P. Yeh﹐Introduction to Photorefractive Nonlinear
Optics﹐John Wiley & Sons﹐New York(1993).
〔31〕Yong-Jing Wang﹐Manlin Pei﹐Gene O. Carlisle﹐Appl.
Phys. Lett. 28﹐10(2003).
〔32〕E. Sackmann﹐J. Am. Chem. Soc. 93(1971)7088.
〔33〕Haas﹐W. E.﹐Nelson﹐K. F.﹐Adams J. E.﹐Dir﹐G. A.
J. Electrochem. Soc. 1974﹐121﹐1667.
〔34〕H.–K. Lee﹐K. Doi﹐H. Harada﹐O. Tsutsumi﹐A.
Kanazawa﹐T. Shiono﹐T. Ikeda﹐J. Phys. Chem. B 104
(2000)7023.
〔35〕C.-R. Lee﹐T.-S. Mo﹐K.-T. Cheng﹐T.-L. Fu and A. Y.-
G. Fuh﹐Appl. Phys. Lett.﹐83﹐4285 (2003), and
reference therein.
〔36〕B. I. Senyuk, I. I. Smalyukh, and O. D.
Lavrentovich﹐Opt. Lett.﹐30,4,349-351(2005).
〔37〕Shin-Woong Kang﹐Liang-Chy Chien﹐Appl. Phys.
Lett.﹐ 90﹐221110(2007).
〔38〕T. Ishikawa﹐O. D. Lavrentovich﹐Phys. Rev. E﹐60.﹐
030501(2001).