서지주요정보
이차원 비선형 광결정을 이용한 2·3·4차 조화파의 동시 생성 = Simultaneous $2^{nd}, 3^{rd}$ and $4^{th}$ harmonic generations in a two-dimensional nonlinear photonic crystal using $LiNbO_3$
서명 / 저자 이차원 비선형 광결정을 이용한 2·3·4차 조화파의 동시 생성 = Simultaneous $2^{nd}, 3^{rd}$ and $4^{th}$ harmonic generations in a two-dimensional nonlinear photonic crystal using $LiNbO_3$ / 배성학.
저자명 배성학 ; Bae, Sung-Hak
발행사항 [대전 : 한국과학기술원, 2004].
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소장정보

등록번호

8014811

소장위치/청구기호

학술문화관(문화관) 보존서고

MPH 04013

휴대폰 전송

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초록정보

Periodic modulation of refractive index or linear optical susceptibility $χ^(1)$ forms photonic crystal structures, which give rise to very interesting phenomena, such as photonic band gaps. Likewise, periodic modulation of second-order nonlinear optical susceptibility $χ^{(2)}$ provides nonlinear photonic crystal structures, which are very promising for wavelength conversion because of its high conversion efficiency and easy wavelength tunability. The nonlinear photonic crystal structures can be fabricated artificially by periodic poling of ferroelectric crystals. Since vector phase-matchings necessary for efficient generation of harmonic waves in various directions are available with an aid of reciprocal lattice vectors, it is possible to generate several multi-harmonics of a fundamental wavelength simultaneously in the two-dimensional nonlinear photonic crystals. Two-dimensional nonlinear photonic crystals based on a lithium niobate ($LiNbO_3$) crystal were fabricated by an electrical poling technique. The $LiNbO_3$ crystals of a single domain were cut and polished in such a manner that the largest second-order nonlinear coefficient of $d_{33}=27.2pm/V$ can be utilized. The single domain $LiNbO_3$ crystal plates of 4 mm diameter and 0.2 mm thickness were electrically poled with a square lattice pattern of 19μm periodicity. The etched surface of both +c and -c faces of the fabricated $LiNbO_3$ reveals an excellent quality of the fabricated nonlinear photonic crystal. Second (775 nm), third (516.7 nm) and fourth (387.5 nm) harmonics were simultaneously generated by using an optical parametric oscillator, operating at 1550 nm wavelength with a pulse width of 20 ns. The phase-matching angles for multiple harmonic generations were theoretically calculated based on the nonlinear Bragg law. The nonlinear Ewald construction and the calculated phase-matching angles showed an excellent agreement with the experiments.

서지기타정보

서지기타정보
청구기호 {MPH 04013
형태사항 iv, 43 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Sung-Hak Bae
지도교수의 한글표기 : 윤춘섭
지도교수의 영문표기 : Choon-Sup Yoon
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 수록
주제 비선형 광결정
Nonlinear photonic crystal
harmonic generation
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