콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Doped Colloidal Photonic Crystal Structure with Refractive Index Chirping to the [111] Crystallographic Axis
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2005-12
- 저자명 Jeong-Ho Park, Won San Choi, Hye Young Koo and Dong-Yu Kim*
- 학술지명 Langmuir
- 발행처명 ACS Publications
- 발행국가 해외
- 논문언어 외국어
- 논문 다운로드 링크(외부) https://doi.org/10.1021/la052071n
- 연구분야 공학 > 화학공학
논문 초록 (Abstract)
A three-dimensionally ordered array of close-packed colloidal spheres, a photonic crystal structure in which the refractive index of the medium interstitial lattice in a colloidal crystal spatially changes in the [111] crystallographic axis, is demonstrated. The colloidal photonic crystal structure with refractive index chirping was produced by infiltration of a monomer and organic dopants with a high refractive index into a silica opal, followed by interfacial gel polymerization. The resulting photonic crystal structure has a gradually varying stop band at each different (111) plane in the face-centered cubic (fcc) crystal structure at a normal incidence. This novel structure exhibited optical characteristics that have band-gap broadening by the superposition of stop bands at each plane of the crystal with different dielectric functions. Moreover, the refractive index perturbation in the [111] fcc opal also showed a defect state within a pseudo-photonic band gap. This new type of photonic crystal structure should be useful for the band-gap engineering of photonic-band-gap materials.
