Anomalous reflection from colloidal crystals of core-shell particles

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作者
Harada, Masashi [1 ]
Ishii, Masahiko [1 ]
Nakamura, Hiroshi [1 ]
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[1] Toyota Central RandD Laboratories, Inc., Nagakute, Aichi 480-1192, Japan
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The reflection from colloidal crystals of core-shell particles is evaluated by the calculation of photonic band structures; and is compared with the prediction of the Bragg condition. Although the results of the calculation of the photonic band structures are consistent with those of the Bragg condition; generally; the photonic band structures predict another reflection which has no origin in the Bragg condition; when the shell of the particle is sufficiently thin and the difference in refractive index between the core and the shell is relatively large. Moreover; no reflection is expected in the case of moderate shell thickness and moderate refractive index difference. © 2006 The Japan Society of Applied Physics;
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页码:7729 / 7731
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