期刊
PHYSICAL REVIEW LETTERS
卷 103, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.103.023901
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资金
- RFBR, Russia [08-020064]
- Australian Research Council
- Japan Society for the Promotion of Science (JSPS) [17106004]
- Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT)
- Grants-in-Aid for Scientific Research [17106004] Funding Source: KAKEN
We report the observation of a Fano resonance between continuum Mie scattering and a narrow Bragg band in synthetic opal photonic crystals. The resonance leads to a transmission spectrum exhibiting a Bragg dip with an asymmetric profile, which can be tunably reversed to a Bragg rise. The Fano asymmetry parameter is linked with the dielectric contrast between the permittivity of the filler and the specific value determined by the opal matrix. The existence of the Fano resonance is directly related to disorder due to nonuniformity of a-SiO(2) opal spheres. The theoretical quasi-3D model produces results in excellent agreement with the experimental data.
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