서지주요정보
박막형 삼각형 광결정 공진기의 공진모드에 관한 이론적 연구 = Computational study on resonant modes of two-dimesional slab triangular photonic crystal cavities
서명 / 저자 박막형 삼각형 광결정 공진기의 공진모드에 관한 이론적 연구 = Computational study on resonant modes of two-dimesional slab triangular photonic crystal cavities / 허준.
저자명 허준 ; Huh, Joon
발행사항 [대전 : 한국과학기술원, 2002].
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소장정보

등록번호

8013251

소장위치/청구기호

학술문화관(문화관) 보존서고

DPH 02014

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초록정보

The modes of single defect 2-D photonic bandgap(PBG) slab cavities are studied theoretically by using 3-D finite difference time domain(FDTD). We analyzed the characteristics of several resonant modes, such as mode profile, field direction and quality factors under the different cladding conditions and slab thickness. In the free-standing structures that the above and below claddings of the slab are air, a two-dimensional monopole mode is proposed and analyzed as a candidate for a nondegenerate PBG cavity mode. This monopole mode formed in a single defect triangular PBG cavity is truly nondegenerate and remains nindegenrate in the sense that intoduction of asymmetry does not result in splitting of the mode. Several methods to tune the resonant frequency of the mode are studied. The radii, positions, and shape of the nearest neighbor air hole are varied in this analysis using the 3-D FDTD calculations. The quality factor of the monopole mode formed in a slab waveguide structure is found to be larger than that of the dipole mode in the nearest elliptical air-hole around the cavity. Also the radiation loss mechanisms of monopole and dipole modes were analyzed from the vertical distribution of electric field. The loss mechanism of cavity modes in the several cladding conditions of photonic crystal slab single defect cavity is investigated. It is described that the low Q factor of <20,000 of the dipole and monopole mode can be explained as the high overlap of radiation losses. It has been demonstrated by analyzing quality factors and the distribution of electric field the nondegenerate hexapole mode has characteristic of a very small radiation loss, and exhibits a very high quality factor of >100,000 in the free-standing triangular photonic crystal slab. Also in the asymmetric cladding of air and oxide the quality factor of hexapole mode as large as about 10000, which correspond to 30% compared to that of the free-standing PBG structure. The high quality factor of >30,000 in the symmetric oxide cladding has been achieved when the slab thickness is equal to $0.8a. In conclusion, it has been shown the nondegenerate hexapole mode has the highest quality factor among the triangular PBG single defect slab cavity modes.

서지기타정보

서지기타정보
청구기호 {DPH 02014
형태사항 iii, 97 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Joon Huh
지도교수의 한글표기 : 이용희
지도교수의 영문표기 : Yong-Hee Lee
학위논문 학위논문(박사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 93-97
주제 광결정
단일 셀 공진기
비축퇴
모노폴
Q값
photonic crystal
single cell cavity
nondegenerate
monopole
quality factor
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