Enhanced birefingence of MgF2 thin film at 193 nm by serial bideposition

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/28077

Title:	Enhanced birefingence of MgF2 thin film at 193 nm by serial bideposition
Authors:	Liu,MC;Lee,CC;Chiang,CJ;Jaing,CC
Contributors:	光電科學研究所
Keywords:	VACUUM ULTRAVIOLET;DEPOSITION;ANGLE;OXIDE
Date:	2009
Issue Date:	2010-06-29 19:41:20 (UTC+8)
Publisher:	中央大學
Abstract:	Magnesium fluoride films were coated by serial bideposition with a varying number of sub-deposited layers. The deposition angle 70A degrees remained constant throughout the process by a single electron-beam source. One, 4, 20, and 100 sub-deposition layers were prepared. The microstructure, residual stress, absorption of water, and linear birefringence of serial bideposition of anisotropic thin film at 193 nm were investigated and discussed. Microstructures of the films were observed by scanning electron microscopy. The residual stress was measured by phase-shifting interferometer. The water absorption bands of the thin films were measured by Fourier transform infrared (FTIR) spectroscopy, and refractive indices in two different directions (S- and P-polarized) were determined from a spectrometer equipped with a polarizer. The linear birefringence would increase and the stress would decrease when the sub-deposited layers were increased. When the number of layers was 100, the difference between the refractive indices for two different polarizations was able to reach 0.082.
Relation:	OPTICAL REVIEW
Appears in Collections:	[Graduate Institute of Optics and Photonics] journal & Dissertation

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