Spectral blueshift as a three-dimensional structure-ordering process
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The transmission spectra of a TiO2-silicone oil suspension in an increasing external electric field are studied. As the electric field increases, the structure of the suspension changes from a disordered one to an ordered one. Interestingly, the transmission spectra blueshift in this structure-ordering process. Furthermore, the relative transmission spectra exhibit Fano-like asymmetric line shapes. The deviation ratio of each asymmetric line shape increases monotonously as the disorder of the suspension decreases. We suggest that this blueshift phenomenon can be used to characterize the disorder strength of three-dimensional systems.
Keywordsdisordered medium light propagation transmission spectrum blueshift
We thank Biqin Dong, Jian Chang, Haiwei Yin, Yafeng Zhang, Yiwen Zhang, Xiangying Shen, Yanwen Tan, and Jian Zi for their fruitful helps and discussions. The financial support of the Science and Technology Commission of Shanghai Municipality (Grant No. 16ZR1445100) is gratefully acknowledged.
- 2.Q. Gong and X. Hu, Photonic Crystals: Principles and Applications, Pan Standford: Academic Press, 2014Google Scholar
- 32.C. F. Bohren and D. R. Huffman, Absorption and Scattering of Light by Small Particles, New York: Wiley, 1983, page 118Google Scholar