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公开(公告)号：CA2296808A1
公开(公告)日：2000-08-11
申请号：CA2296808
申请日：2000-01-24
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BRAUN PAUL VANNEST , WILTZIUS PIERRE , STEIGERWALD MICHAEL LOUIS
Abstract: A structure, e.g., a photonic band gap material, exhibiting substantial periodicity on a micron scale is provided. Fabrication involves the steps of providing a template comprising a colloidal crystal, placing the template in an electrolytic solution, electrochemically forming a lattice material, e.g., a high refractive index material, on the colloidal crystal, and then removing the colloidal crystal particles to form the desired structure. The electrodeposition provides a dense, uniform lattice, because formation of the lattice material begins near a conductive substrate, for example, and growth occurs substantially along a plane moving in a single direction, e.g., normal to the conductive substrate. Moreover, because the electrochemically grown lattice is a three-dimensionally interconnected solid, there is very little shrinkage upon subsequent treatment.
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公开(公告)号：CA2296819A1
公开(公告)日：2000-08-11
申请号：CA2296819
申请日：2000-01-24
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BRAUN PAUL VANNEST , PATEL SANJAY , WILTZIUS PIERRE
Abstract: A structure exhibiting substantial periodicity on a micron scale, e.g., a photonic band gap material, is provided. The structure is fabricated by a process involving the steps of providing a template comprising a colloidal crystal, and introducing into the colloidal crystal a liquid dispersion of nanoparticles. The resulting composite is treated, e.g., dried, to form a cohesive structure from the nanoparticles, and the colloidal crystal particles are removed to form the ordered structure.
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公开(公告)号：CA2296808C
公开(公告)日：2003-07-22
申请号：CA2296808
申请日：2000-01-24
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BRAUN PAUL VANNEST , STEIGERWALD MICHAEL LOUIS , WILTZIUS PIERRE
Abstract: A structure, e.g., a photonic band gap material, exhibiting substantial periodicity on a micron scale is provided. Fabrication involves the steps of providing a template comprising a colloidal crystal, placing the template in an electrolytic solution, electrochemically forming a lattice material, e.g., a high refractive index material, on the colloidal crystal, and then removing the colloidal crystal particles to form the desired structure. The electrodeposition provides a dense, uniform lattice, because formation of the lattice material begins near a conductive substrate, for example, and growth occurs substantially along a plane moving in a single direction, e.g., normal to the conductive substrate. Moreover, because the electrochemically grown lattice is a three-dimensionally interconnected solid, there is very little shrinkage upon subsequent treatment.
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公开(公告)号：CA2307481A1
公开(公告)日：2000-11-14
申请号：CA2307481
申请日：2000-05-03
Applicant: LUCENT TECHNOLOGIES INC
Inventor： WILTZIUS PIERRE , BRAUN PAUL VANNEST
Abstract: A structure, e.g., a photonic band gap material, is provided exhibiting substantial periodicity on a micron scale, along with desirable density and mechanical integrity. A template comprising a colloidal crystal is provided, and into the interstitial space of the crystal is introduced a molten material. The introduction is typically performed and/or promoted by subjecting the crystal and molten material to a pressurized environment, which tends to force the molten material through the interstitial space of the crystal. The material is cooled, and the colloidal crystal particles are typically removed, e.g., by heating, etching, or dissolving. The resulting material constitutes a highly uniform, high-density structure, due to the invention's use of a continuous liquid phase to fill the void volume, as opposed to techniques that result in porosity and non-uniformities within the final structure.
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