서지주요정보
비정질 $As_2S_3$ 박막의 광유도 비등방성에 관한 연구 = Photoinduced anisotropy and reorientation of anisotripic axis in amorphous $As_2S_3$ thin film
서명 / 저자 비정질 $As_2S_3$ 박막의 광유도 비등방성에 관한 연구 = Photoinduced anisotropy and reorientation of anisotripic axis in amorphous $As_2S_3$ thin film / 김향균.
저자명 김향균 ; Kim, Hyang-Kyun
발행사항 [대전 : 한국과학기술원, 1990].
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소장정보

등록번호

8000502

소장위치/청구기호

학술문화관(문화관) 보존서고

MAP 9006

SMS전송

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이용가능

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반납예정일

초록정보

Photoinduced anisotropy(PIA) in amorphous $As_2S_3$ thin film, deposited by vacuum evaporation, is investigated. PIA is induced by linearly polarized $Ar^+$ ion laser beam(λ=514.5nm) and probed by weak $Ar^+$ ion laser (λ=514.5nm) and He-Ne laser (λ=632.8nm) beam through the crossed analyzer. Keeping pump beam intensity constantly, rotation of pump beam polarization direction induces reorientation phenomena of anisotropic axis. Introducing directional factor into simplified 3-level system, which is used to analyze photodarkening phenomena, analytical representation of PIA is derived. Temporal behavior of PIA and its reorientation phenomena are investigated and compared with theory. Pump beam intensity is 100mW/㎠ and thickness of a-$As_2S_3$ thin film in 3㎛. In that case time constant of photoinduced anisotropy obtained by method of least square curve fitting is $4.0×10^{-2}/sec$. The time constant of PIA we obtained is larger than that of photodarkening ($2.8×10^{-2}/sec$) reported.

서지기타정보

서지기타정보
청구기호 {MAP 9006
형태사항 [ii], 53 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Hyang-Kyun Kim
지도교수의 한글표기 : 이상수
지도교수의 영문표기 : Sang-Soo Lee
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 52-53
주제 Thin films.
Anisotropy.
비정질. --과학기술용어시소러스
박막. --과학기술용어시소러스
이방성. --과학기술용어시소러스
Amorphous substances.
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