서지주요정보
진공증착된 고체박막에 의한 광파위상의 변조 = Modification of optical phase by vacuum deposited thin soild films
서명 / 저자 진공증착된 고체박막에 의한 광파위상의 변조 = Modification of optical phase by vacuum deposited thin soild films / 한성홍.
저자명 한성홍 ; Hahn, Sung-Hong
발행사항 [서울 : 한국과학기술원, 1988].
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4105228

소장위치/청구기호

학술문화관(문화관) 보존서고

DAP 8810

SMS전송

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초록정보

The optical thin film systems correcting the differential phase shift and preserving the state of polarization are investigated. First, the thin film theory derived from Maxwell equations is utilized to obtain thin film matrix representations, and the complex admittances, which is the generalized refractive index, for metal thin film and for total internal reflection are derived. The ratio of the parallel and perpendicular components of the electric field, which is related to the state of polarization, is discussed. From these results, dielectricmetal film systems are designed to give differential phase shifts 0˚, 90˚, 180˚ and 270˚ in reflection. Total reflection in thin film system is useful in correcting differential phase shift. Glass ($n_0=1.80$)-$MgF_2$-air system (case of one dielectric film) and glass ($n_0 =1.52$)-ZnS-$MgF_2$-air system (case of two dielectric film) are designed in order to preserve polarization at the wavelength of He-Ne laser beam. Throughout the present thin film design, computer optimization technique is extensively used. The merit function and its derivatives are analytically calculated for the optimization of the system. In order to give a quarterwave(90˚) differential phase shift and simultaneously high reflectance at 0.633μm and 10.6μm, twenty-layer thin film systems are designed by computer optimization process. It is found that the chromatic differential phase shifts of the film systems vary not more than 0.15˚ and 0.80˚, respectively. The same computer optimization technique is used in the design of four separated dielectric film system which suppress the change in the polarization state of He-Ne laser beam and $CO_2$ laser beam passing through a four spherical mirror system. The stability of the system for random thickness error is checked. In the final design, $TiO_2$ film system and PbTe film system are used for He-Ne laser beam and for $CO_2$ laser beam, respectively.

서지기타정보

서지기타정보
청구기호 {DAP 8810
형태사항 iii, 117 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Sung-Hong Hahn
지도교수의 한글표기 : 이상수
지도교수의 영문표기 : Sang-Soo Lee
학위논문 학위논문(박사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 107-112
주제 Thin films.
Mathematical optimization.
Dielectric films.
박막. --과학기술용어시소러스
최적화. --과학기술용어시소러스
진공 증착. --과학기술용어시소러스
위상 변조. --과학기술용어시소러스
Depositions.
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