Three-dimensionally periodic conductive nanostructures: network versus cermet topologies for metallic PBG

被引:17
作者
Zakhidov, AA [1 ]
Baughman, RH
Khayrullin, II
Udod, IA
Kozlov, M
Eradat, N
Vardeny, VZ
Sigalas, M
Biswas, R
机构
[1] Honeywell Inc, Res & Technol, Morristown, NJ 07962 USA
[2] New Jersey Inst Technol, Newark, NJ 07102 USA
[3] Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA
[4] Iowa State Univ, Ames Lab, Ames, IA 50011 USA
[5] Iowa State Univ, Dept Phys, Ames, IA 50011 USA
关键词
Bragg scattering; cermet; metallic photonic band gap;
D O I
10.1016/S0379-6779(00)00407-0
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Highly periodic three-dimensional metallic mesh composites with silica have been prepared by micromolding synthetic opals using melts of metals and semimetals. These metallic photonic crystals show photonic and electronic properties, which strongly depend on their geometry. Network topology, created in a form of interconnected spherical cages of 200-400 nm diameter, shows a reflectivity peak in the infrared (IR) spectral range, due to a metallic photonic band gap (MPBG), reminiscent of plasmon edge of bulk metal, which is significantly shifted to longer wavelengths. On the other hand, a discontinuous topology of separated clusters in a matrix (so called cermet topology) obtained by three distinct techniques involved controlling the pressure and temperature of the melt during the infiltration process, do not show any MPBG. In the visible spectral range, bright sharp colors of Bragg scattering are observed from both topologies, which are more intense than in conventional, dielectric gem opals in agreement with computer modeling of light reflection from cermet metallo-dielectric photonic crystals. This metallic PBG structures can be used as novel type TR reflectors, color mirrors and conductive electrodes having properties controlled by the topology of 3-D superstructure. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:419 / 426
页数:8
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