WO2003027727A1 - Structure cyclique et procede de production de cette structure - Google Patents

Structure cyclique et procede de production de cette structure Download PDF

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Publication number
WO2003027727A1
WO2003027727A1 PCT/JP2002/009781 JP0209781W WO03027727A1 WO 2003027727 A1 WO2003027727 A1 WO 2003027727A1 JP 0209781 W JP0209781 W JP 0209781W WO 03027727 A1 WO03027727 A1 WO 03027727A1
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WO
WIPO (PCT)
Prior art keywords
particles
periodic structure
optical
core
shell
Prior art date
Application number
PCT/JP2002/009781
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English (en)
Japanese (ja)
Inventor
Masafumi Takesue
Original Assignee
Bando Chemical Industries, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bando Chemical Industries, Ltd. filed Critical Bando Chemical Industries, Ltd.
Publication of WO2003027727A1 publication Critical patent/WO2003027727A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G02B5/23—Photochromic filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B6/122—Basic optical elements, e.g. light-guiding paths
    • G02B6/1225—Basic optical elements, e.g. light-guiding paths comprising photonic band-gap structures or photonic lattices
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B6/13—Integrated optical circuits characterised by the manufacturing method

Definitions

  • the present invention relates to a periodic structure and a method for manufacturing the same.
  • the present invention is applicable to a wide variety of optical modulation elements, optical storage elements, optical switches, optical sensors, band filter elements, color display elements, optical waveguides, optical circuits, duplexers, laser elements, optical delay elements, polarizing elements, etc. It relates to photonic materials that can be applied. Background art
  • a photonic material generally has a periodic structure in which a plurality of components (substances) having different refractive indices are arranged in a one-dimensional, two-dimensional, or three-dimensional order on the order of the wavelength of light.
  • the length ratio a of the length a occupied by the element with the refractive index nl and the length b occupied by another element with the refractive index n 2 / (a + b) 1 has an important meaning together with the refractive index ratio ⁇ 1 / ⁇ 2.
  • This is the same for systems consisting of three or more components. It is desired that various optical characteristics such as not only the refractive index but also the complex refractive index, the dielectric constant, the second-order or third-order nonlinear optical constant can be freely designed with a desired optical characteristic ratio and a desired length ratio. .
  • JP-A-2 0 0 1 7 2 4 1 4 discloses, using known techniques such as photolithography of the Act on the micro mold produced in S i / S i 0 2 substrate, pouring a sol solution A photonic crystal having two-dimensionally periodic voids, which is produced by solidifying and drying the material in the above-described manner, is described.
  • the optical characteristic ratio and the length ratio can be made as designed, but a great deal of labor is required for the manufacture of the mold, interface defects are likely to occur, and more seriously When fabricating a three-dimensional structure, the two-dimensional structure is accurately laminated in the order of nanometers. There were problems that had to be done.
  • Japanese Patent Application Laid-Open No. 2000-230339 discloses that a template of a three-dimensional structure composed of colloidal crystals is prepared, and a dispersion of nanoparticles having a smaller diameter than the colloidal crystal particles is introduced into the voids. Finally, it describes a periodic material produced by removing colloidal crystals. In such a method using a colloidal crystal template, the steps of preparing and removing the template are necessarily required, and therefore, the materials that can be used are limited. Problems such as periodicity being impaired due to impacts, solvents, etc., defects on the surface and interface are likely to occur, and the length ratio cannot be freely designed due to the contact between colloidal crystal particles. was there.
  • US Pat. No. 5,228,370 describes that a colloidal crystal is not used as a template but directly used for producing a periodic structure. According to such a means, the colloidal crystal particles come into contact with each other to form a periodic structure.
  • An object of the present invention is to provide a periodic structure having a high degree of freedom in designing an optical characteristic ratio and a length ratio in order to obtain a desired photonic characteristic, and a manufacturing method for accurately and easily manufacturing the periodic structure. Aim.
  • the present invention is a periodic structure in which at least one type of particle having a layered structure of two or more layers in which adjacent layers are formed of materials having different optical characteristics from each other is arranged.
  • the present invention provides a method for producing a periodic structure in which at least one kind of particles having two or more layered structures in which adjacent layers are formed of materials having different optical properties from each other is arranged through a colloid crystallization step. It is.
  • FIG. 1 shows a core particle having a diameter a using a material having a refractive index n 1 and a material having a refractive index n 2.
  • FIG. 2 is a schematic diagram showing a cross section of a periodic structure obtained by arranging core-shell particles having a shell shell and having an overall diameter of a + b.
  • Figure 2 shows the results obtained by arranging core-shell particles with a diameter of a 'using a material with a refractive index of nl, a shell with a material with a refractive index of n2, and an overall diameter of a + b.
  • FIG. 1 shows a core particle having a diameter a using a material having a refractive index n 1 and a material having a refractive index n 2.
  • FIG. 2 is a schematic diagram showing a cross section of a periodic structure obtained by arranging core-shell particles having a shell shell and having an overall diameter of a + b.
  • Figure 2 shows the results obtained by
  • FIG. 4 is a schematic diagram showing a cross section of a periodic structure.
  • FIG. 3 is a schematic diagram showing an embodiment in which voids of the core-shell type particles of the periodic structure shown in FIG. 1 are filled with a substance having a refractive index of n3.
  • the inventor of the present invention has proposed a method of using a particle having a structure generally called a core-shell structure (a structure having three or more layers is also possible) composed of a plurality of constituent elements having different optical characteristics, thereby providing a cyclical structure having a high degree of freedom in design.
  • the inventors have found that a structure can be easily and accurately produced, and furthermore, have found that a periodic structure can be produced more simply and accurately by co-crystallizing such particles, leading to the completion of the present invention.
  • a structure can be easily and accurately produced, and furthermore, have found that a periodic structure can be produced more simply and accurately by co-crystallizing such particles, leading to the completion of the present invention.
  • the particles used in the present invention have two or more layered structures in which adjacent layers are formed of materials having different optical properties.
  • optical characteristics are not particularly limited, and examples thereof include a refractive index, a complex refractive index, a dielectric constant, a second-order linear optical constant, and the like.
  • Each layer of the above particles is formed of a material having a different optical property, but the material constituting each layer may not be composed of a single material.
  • fine particles of different materials may be used to adjust the refractive index. Mixtures can also be used.
  • the number of layers of the particles is not particularly limited as long as it is two or more layers.
  • the above-mentioned particles for example, core-shell type particles obtained by using a material ⁇ ⁇ ⁇ as a core material and covering it with a material B having different optical properties can be used.
  • the desired refractive index ratio In order to obtain, the materials used for the core and the shell may be selected in consideration of the refractive index, and in order to obtain a desired length ratio, the particle size of the core portion and the thickness of the shell portion may be adjusted.
  • the particles may be, for example, particles having a core shell structure of three or more layers in order to adjust optical characteristics.
  • the method for producing such core-shell type particles is not particularly limited, and a known method can be used.
  • hollow particles can be used in order to utilize air as a material having a low refractive index.
  • the shape of the particles is not particularly limited, and may not necessarily be spherical, and examples thereof include a cube, a rectangular parallelepiped, a rod, a column, a spindle, and an elliptical sphere.
  • the periodic structure of the present invention is obtained by arranging the above particles.
  • Examples of the form of the arrangement of the particles in the periodic structure of the present invention include an arbitrary lattice structure such as a simple cubic lattice, a face-centered cubic lattice, and a body-centered cubic lattice.
  • the dielectric constant and length ratio of the particles to be used may be adjusted.
  • particles of different particle sizes and shapes may be mixed and used. Is also good.
  • the method for producing the periodic structure of the present invention is not particularly limited, it can be obtained, for example, by subjecting the above particles to colloid crystallization.
  • the method for producing such a colloid crystal is not particularly limited, and a known method can be used.
  • To produce periodic structures by colloidal crystallization it is easiest to make them in a solvent, but the resulting periodic structures may be used in the presence of a solvent, and may be dried. The solvent may be removed by using such a method.
  • the surface of the periodic structure may be further heat-fused by heating (Jpn. J. App 1. Phys., 36 (19997)).
  • L 714-L 717) add a polymerizable monomer and a crosslinking agent or initiator to the solvent in advance.
  • the periodic structure after the periodic structure is manufactured, it may be polymerized by heat or light (US Pat. No. 5,281,370) to increase the mechanical strength of the periodic structure for use.
  • the optical characteristics may be adjusted by filling the voids of the crystal with an appropriate medium.
  • a method for producing a periodic structure in which the particles are arranged through a colloid crystallization step is also one of the present invention.
  • the conditions of heat fusion, and the like, the mechanical properties and the like are adjusted, and the optical properties change in response to stress.
  • the mechanical strength of the polymer including the periodic structure may be adjusted by changing the polymerization conditions.
  • the type of the solvent is selected so that the periodic structure of the present invention obtains the desired optical properties, the solvent is introduced after the heat fusion, and the polymerizable material is added at that time to finally polymerize. May be.
  • the colloidal crystal particles come into contact with each other and the length ratio cannot be freely designed. Problems can be solved, design flexibility is high, and products as designed can be obtained easily and with high accuracy.
  • a periodic structure is formed from particles having two or more layers, a desired refractive index ratio and a desired length ratio can be arbitrarily and easily adjusted.
  • the periodic structure of the present invention includes, for example, an optical modulation element, an optical storage element, an optical switch, an optical sensor, a band filter element, a color display element, an optical waveguide, an optical circuit, a duplexer, a laser element, an optical delay element,
  • an optical modulation element for example, an optical modulation element, an optical storage element, an optical switch, an optical sensor, a band filter element, a color display element, an optical waveguide, an optical circuit, a duplexer, a laser element, an optical delay element,
  • Such an optical material comprising the periodic structure of the present invention is also one of the present invention.
  • FIG. 1 shows a core particle with a diameter of a using a material with a refractive index of n1 and a shell-shell material with a material with a refractive index of n2.
  • FIG. 2 is a schematic diagram in a cross section for illustrating the concept of a dynamic structure.
  • Fig. 2 shows an example in which particles having a diameter different from that of Fig. 1 are used for the core, and the diameter of the entire core-shell type particle is the same as that of Fig. 1.
  • the length ratio can be set to a desired value.
  • the shape of the particles used in the periodic structure of the present invention is not particularly limited to a spherical shape.
  • FIG. 3 shows an embodiment in which the voids of the particles in FIG. 1 are filled with a substance having a refractive index of n3.
  • n 3 may be different from n 1 or n 2, or may be the same.
  • the core particles include inorganic substances such as cadmium sulfide, lead sulfide, gallium arsenide, zirconium oxide, indium tin oxide, titanium oxide, silicon oxide, and aluminum oxide; polystyrene, polycarbonate, polymethylmetharylate Can be used.
  • a material in which particles made of different materials are dispersed may be used as the core particle material.
  • the particle size of the core particles is not particularly limited, but is preferably about l to 100 nm.
  • the core particles are directly or surface-modified by coupling treatment or the like by a known method as appropriate, and then coated with a shell to obtain core-shell particles.
  • the material used for the shell shell include inorganic polymers such as silicon oxide; and organic polymers such as polystyrene, polycarbonate, and polymethyl methacrylate.
  • Known methods can be used for coating the core particles with a shell shell, and for example, seed polymerization can be used.
  • the surface state of the obtained core-shell type particles can be variously modified by adjusting to the subsequent colloidal crystallization and adjusting the optical properties.
  • the particle size of the core-shell type particles is not particularly limited, it is preferably about 10 to 100 nm. After dispersing such core-shell type particles in an appropriate solvent, they were allowed to stand in a container having an appropriate shape and colloidally crystallized to obtain a periodic structure. Then, the solvent was removed in a drying oven, and the material was heated to about the melting point to increase the mechanical strength of the colloid crystal. Then, when polystyrene was selected as the material of the shell, the styrene monomer, the crosslinking agent, and the photopolymerization initiator were dissolved in a solvent, and the periodic structure was slowly immersed. Then, the pressure was reduced to remove bubbles, and then ultraviolet rays were irradiated to advance the polymerization. Then, it was slowly dried to remove the solvent.
  • ADVANTAGE OF THE INVENTION in order to obtain a desired photonic characteristic, it is possible to provide a periodic structure having a high degree of freedom in designing an optical characteristic ratio and a length ratio, and a manufacturing method for accurately and easily manufacturing the periodic structure. .

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Nanotechnology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Integrated Circuits (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)

Abstract

L'invention concerne une structure cyclique possédant un haut degré de liberté pour concevoir un rapport de caractéristique optique et un rapport de longueur permettant d'obtenir une caractéristique photonique voulue. L'invention concerne également un procédé permettant de produire une telle structure cyclique de manière simple avec une grande précision. Cette structure cyclique comprend au moins un type de particules disposées de façon à former une structure stratifiée composée d'au moins deux couches, les couches adjacentes étant constituées de matières présentant des caractéristiques optiques différentes.
PCT/JP2002/009781 2001-09-21 2002-09-24 Structure cyclique et procede de production de cette structure WO2003027727A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001289772A JP2003098367A (ja) 2001-09-21 2001-09-21 周期的構造体及びその製造方法
JP2001-289772 2001-09-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023068283A1 (fr) * 2021-10-20 2023-04-27 公立大学法人名古屋市立大学 Cristal colloïdal et sa méthode de production

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WO2005012961A1 (fr) * 2003-07-31 2005-02-10 Soken Chemical & Engineering Co., Ltd. Cristal colloidal fluide et procede de production de masse de particules tridimensionnelles alignees a partir de ce cristal
CN100456056C (zh) * 2003-07-31 2009-01-28 综研化学株式会社 流动性胶体晶体以及使用该晶体制造三维有序晶格的方法
JP4546129B2 (ja) * 2004-04-08 2010-09-15 独立行政法人科学技術振興機構 異径微粒子団集積体の製造方法、異径微粒子団集積体及び異径微粒子団細線アレイ
JP2006167855A (ja) * 2004-12-15 2006-06-29 Ricoh Co Ltd 周期性構造物の作成方法、周期性構造物、および、周期性構造物を用いた光学素子
WO2010131430A1 (fr) 2009-05-12 2010-11-18 パナソニック株式会社 Feuille et dispositif électroluminescent
JP6171291B2 (ja) * 2012-09-07 2017-08-02 凸版印刷株式会社 表示体の真偽判定方法

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US5281370A (en) * 1990-08-22 1994-01-25 University Of Pittsburgh Of The Commonwealth System Of Higher Education Method of making solid crystalline narrow band radiation filter
JP2001042144A (ja) * 1999-07-28 2001-02-16 Catalysts & Chem Ind Co Ltd フォトニック結晶およびフォトニック結晶層付基材
EP1081513A1 (fr) * 1999-09-01 2001-03-07 Lucent Technologies Inc. Procédé pour fabriquer un cristal colloidal à ordre tridimensionnel
EP1089093A2 (fr) * 1999-09-28 2001-04-04 Fuji Photo Film Co., Ltd. Revêtement antiréfléchissant, plaque polarisante avec le revêtement, et dispositif d'affichage d'images utilisant le revêtement antiréfléchissant ou la plaque polarisante
EP1097752A2 (fr) * 1999-11-04 2001-05-09 Dai Nippon Printing Co., Ltd. Procédé pour fabriquer des composites polymère-particules

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Publication number Priority date Publication date Assignee Title
US5281370A (en) * 1990-08-22 1994-01-25 University Of Pittsburgh Of The Commonwealth System Of Higher Education Method of making solid crystalline narrow band radiation filter
JP2001042144A (ja) * 1999-07-28 2001-02-16 Catalysts & Chem Ind Co Ltd フォトニック結晶およびフォトニック結晶層付基材
EP1081513A1 (fr) * 1999-09-01 2001-03-07 Lucent Technologies Inc. Procédé pour fabriquer un cristal colloidal à ordre tridimensionnel
EP1089093A2 (fr) * 1999-09-28 2001-04-04 Fuji Photo Film Co., Ltd. Revêtement antiréfléchissant, plaque polarisante avec le revêtement, et dispositif d'affichage d'images utilisant le revêtement antiréfléchissant ou la plaque polarisante
EP1097752A2 (fr) * 1999-11-04 2001-05-09 Dai Nippon Printing Co., Ltd. Procédé pour fabriquer des composites polymère-particules

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Title
BREEN M.L. ET AL.: "Sonochemically produced ZnS-coated polystyrene core-shell particles for use in photonic crystals", vol. 17, no. 3, 6 February 2001 (2001-02-06), pages 903 - 907, XP002961087 *
VELIKOV KRASSIMIR P. ET AL.: "Synthesis and characterization of monodisperse core-shell colloidal spheres of zinc sulfide and silica", LANGMUIR, vol. 17, no. 16, 7 August 2001 (2001-08-07), pages 4779 - 4786, XP002961086 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023068283A1 (fr) * 2021-10-20 2023-04-27 公立大学法人名古屋市立大学 Cristal colloïdal et sa méthode de production

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