화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2005년 가을 (10/13 ~ 10/14, 제주 ICC)
권호 30권 2호
발표분야 분자전자 부문위원회
제목 Fabrication of Surface Relief Gratings with Graded Profile on Azopolymer Films Utilizing Replication Method
초록 Fabrications of surface relief gratings (SRGs) on photosensitive organic thin films have been attracted for optoelectronic applications such as optical data storages, optical waveguides, optically controllable gratings, and liquid crystal alignment layers. Particularly, azobenzene containing organic materials which are fabricated to the stable gratings by ultraviolet or visible light below the glass transition temperature (Tg) have been reported by many researchers. The interference pattern by azo-chromorphore excitation light cause a molecular migration due to isomerization of azobenzene moieties in the azopolymer films. In this presentation, we demonstrate fabrication of SRGs with graded profile utilizing replication and deformation of poly (dimethylsiloxane) (PDMS). PDMS replica was fabricated by immersing of azopolymer SRG into the PDMS prepolymer fluids, curing in vacuum oven, and removing template. PDMS molds are able to deform because of their flexible elastomeric property. For the formation of graded profiled SRGs, PDMS replica was deformed by compression or expansion of one side of grating on PDMS surface. After the polarized Ar ion laser light penetrated into PDMS replica, this light was diffracted at the grating surface, and the interference of diffracting light caused SRGs following the profile of PDMS replica on the azopolymer thin film near PDMS grating. The surface profiles of SRGs were investigated by atomic force microscopy.
저자 홍재철, 박정호, 천채민, 김동유
소속 광주과학기술원 신소재공학과
키워드 azopolymer; surface relief grating
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