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제107회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Thermally tunable microlenses using smectic liquid crystal defects

등록일
2011년 2월 24일 16시 54분 46초
접수번호
1690
발표코드
Ⅳ-ORGN.P-333 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅳ>
발표형식
포스터
발표분야
유기화학
저자 및
공동저자
김정현, 정현수, 손백식, 정희태
KAIST 생명화학공학과, Korea
We demonstrate a new type of a thermally tunable microlens which is entirely based on self-assembly of liquid crystal defects. Unlike previous researches for fabricating tunable microlens using liquid crystal, this method is used solely liquid crystalline materials without mixing other materials or applying external field. Due to antagonistic anchoring conditions of liquid crystals at the smectic A and air interface in microchannels coated planar anchoring materials, smectic liquid crystals form typical defect textures called toric focal conic domains (TFCDs). TFCD-based MLAs have several advantages over other MLAs. This system focuses light using the intrinsic molecular orientations of TFCDs rather than geometrical shape, leading to high quality lens properties. Furthermore, the lens itself has tunable light transportation and all the changes could be reversibly controlled by temperature. In addition, the focal length and array number of microlens can be easily controlled by varying the feature dimension of the confined channel. Thus, this method is very easy to fabricate thermal responsive MLAs with a variety of focal length and number of array using defect structure of smectic liquid crystal.

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