Complete photonic bandgaps in the visible range from spherical layer structures in dichromate gelatin emulsions

Hung, J. C.; Kok, Mang Hin; Tam, Wing Yim

doi:10.1063/1.3064165

Cited by 9 publications

(14 citation statements)

References 28 publications

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“…In a material with a complete PBG, light with a specifi c wavelength cannot propagate in any direction. Due to the limited options of materials with high refractive index that do not absorb visible light, it is challenging to obtain materials with a complete PBG in the visible range; [ 7 ] instead incomplete PBGs or pseudo PBGs are usually produced. A pseudo PBG in the visible range results in materials whose colors vary with the viewing angle.…”

Section: Introductionmentioning

confidence: 99%

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Tunable Colors in Opals and Inverse Opal Photonic Crystals

Aguirre¹,

Reguera²,

Stein

2010

Adv Funct Materials

546

417

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Colloidal photonic crystals and materials derived from colloidal crystals can exhibit distinct structural colors that result from incomplete photonic band gaps. Through rational materials design, the colors of such photonic crystals can be tuned reversibly by external physical and chemical stimuli. Such stimuli include solvent and dye infi ltration, applied electric or magnetic fi elds, mechanical deformation, light irradiation, temperature changes, changes in pH, and specifi c molecular interactions. Reversible color changes result from alterations in lattice spacings, fi lling fractions, and refractive index of system components. This review article highlights the different systems and mechanisms for achieving tunable color based on opaline materials with closepacked or non-close-packed structural elements and inverse opal photonic crystals. Inorganic and polymeric systems, such as hydrogels, metallopolymers, and elastomers are discussed.

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Section: Introductionmentioning

confidence: 99%

“…n avg = Nn spheres + (1 − N)n background (7) where φ is the solid fraction in the material. The distance d is the spacing between close-packed planes of voids, d hkl :…”

Section: Introductionmentioning

confidence: 99%

Tunable Colors in Opals and Inverse Opal Photonic Crystals

Aguirre¹,

Reguera²,

Stein

2010

Adv Funct Materials

546

417

View full text Add to dashboard Cite

show abstract

“…9) in a discretionary condition. In addition, a miniversion of the self-similar spherical structure is successfully fabricated by Hung et al [123]. They have fabricated spherical layer structures that exhibit the CBGs in the visible range in DCG by holographic interference.…”

Section: The Band Characteristics Of Pcs Made By Dcgmentioning

confidence: 96%

Photonic crystals and microlasers fabricated with low refractive index material

2010

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Although the investigation on photonic band gap materials has been done more than two decades, it is still a big challenge to fabricate three-dimensional photonic crystal (PC) possessing wide band gaps in visible range. In this article, we have reviewed recent progresses on fabricating the PC with low refractive index material in visible range. In contrast to the material with large refractive index, it is cheap to use low refractive index material in fabricating the PC and will be greatly beneficial for future industrial productions. The holographic method to fabricate such a PC has been introduced, applying it to the design of the microlaser has also been discussed.

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“…In addition, it is challenging to fabricate architectures with a complete PBG in the visible range. 46 This is due to the limited choice of transparent materials having high refractive indices, necessary for achieving high refractive index contrast. It is simpler, instead, by using a combination of materials with lower contrast, to produce incomplete or pseudo-PBG materials in the visible range (called iridescent materials) whose colours vary with the viewing angle.…”

Section: Virgilio Mattolimentioning

confidence: 99%