Dielectric Planar Defects in Colloidal Photonic Crystal Films

Tétreault, Nicolas; Mihi, Agustín; Míguez, Hernán; Rodríguez, Isabelle; Ozin, Geoffrey A.; Meseguer, F.; Kitaev, Vladimir

doi:10.1002/adma.200306361

Cited by 123 publications

(112 citation statements)

References 24 publications

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“…[125] The overall shape of the spectra agreed qualitatively, however a discrepancy was noted in the reflectance intensities and all theoretical spectra were scaled by an arbitrary factor to enable comparison. [125] Active planar embedded defects were incorporated into a CC via the growth or transfer printing of a polyelectrolyte multilayer on a CC followed by the Figure 12. a) Schematic procedure for incorporating line defects within colloidal PhCs.…”

Section: D Embedded Defects Via Multistep Proceduresmentioning

confidence: 95%

“…[123] A multiple-step procedure for incorporating an extrinsic embedded planar defect consisting of a layer of silica between two silica-air inverse opals is shown in Figure 14. [124,125] The impact of the silica defect layer thickness on position of the defect mode within the pseudogap was studied experimentally [124][125][126] and via scalar wave approximation calculations. [125] The overall shape of the spectra agreed qualitatively, however a discrepancy was noted in the reflectance intensities and all theoretical spectra were scaled by an arbitrary factor to enable comparison.…”

Section: D Embedded Defects Via Multistep Proceduresmentioning

confidence: 99%

“…[124,125] The impact of the silica defect layer thickness on position of the defect mode within the pseudogap was studied experimentally [124][125][126] and via scalar wave approximation calculations. [125] The overall shape of the spectra agreed qualitatively, however a discrepancy was noted in the reflectance intensities and all theoretical spectra were scaled by an arbitrary factor to enable comparison. [125] Active planar embedded defects were incorporated into a CC via the growth or transfer printing of a polyelectrolyte multilayer on a CC followed by the Figure 12.…”

Section: D Embedded Defects Via Multistep Proceduresmentioning

confidence: 99%

See 2 more Smart Citations

Introducing Defects in 3D Photonic Crystals: State of the Art

2006

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Public Reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comment regarding this burden estimates or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188,) Washington, DC 20503. AGENCY USE ONLY ( Leave Blank)2. REPORT DATE Advanced Materials, 18, 2665-2678 (2006). 3D photonic crystals (PhCs) and photonic bandgap (PBG) materials have attracted considerable scientific and technological interest. In order to provide functionality to PhCs, the introduction of controlled defects is necessary; the importance of defects in PhCs is comparable to that of dopants in semiconductors. Over the past few years, significant advances have been achieved through a diverse set of fabrication techniques. While for some routes to 3D PhCs, such as conventional lithography, the incorporation of defects is relatively straightforward; other methods, for example, selfassembly of colloidal crystals (CCs) or holography, require new external methods for defect incorporation. In this review, we will cover the state of the art in the design and fabrication of defects within 3D PhCs. The figure displays a fluorescence laser scanning confocal microscopy image of a y-splitter defect formed through two-photon polymerization within a CC. SUBJECT TERMS 15. NUMBER OF PAGES 1416. PRICE CODE SECURITY CLASSIFICATION OR REPORT UNCLASSIFIED SECURITY CLASSIFICATION ON THIS PAGE UNCLASSIFIED SECURITY CLASSIFICATION OF ABSTRACT UNCLASSIFIED LIMITATION OF ABSTRACT UL IntroductionPhotonic crystals (PhCs) are materials that possess spatial periodicity in their dielectric constant on the order of the wavelength (k) of light. These materials can strongly modulate light [1] and, with sufficient dielectric contrast and an appropriate geometry, may exhibit a photonic bandgap (PBG). This concept was first proposed in 1975 by Bykov [2] but remained relatively unknown until the seminal work of Yablonovitch [3] and John. [4] In a rough analogy to semiconductors, which possess an electronic bandgap, a PBG material prohibits the existence of photons with energies in the PBG. PhCs are naturally classified by the dimensionality of their periodicity, and in order to rigorously prevent the propagation of PBG frequencies in all directions, a 3D PhC with an omnidirectional, or complete PBG (cPBG) is required. cPBG materials have been fabricated and well characterized for operation at microwave and radio frequencies, however, operation in the visible and IR requires the characteristic length scales of these structures to be scaled down by several orders of magnitude...

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Section: D Embedded Defects Via Multistep Proceduresmentioning

confidence: 95%

Section: D Embedded Defects Via Multistep Proceduresmentioning

confidence: 99%

Section: D Embedded Defects Via Multistep Proceduresmentioning

confidence: 99%

See 1 more Smart Citation

Introducing Defects in 3D Photonic Crystals: State of the Art

2006

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“…However, besides surface area growth, such complicated structure of the multihierarchical materials also provides additional structure-induced properties such as extending the light absorption area into the visible region. For example, photonic crystals have been reported to promote light absorption by increasing the reflection of the light path when the incident light passes through the material [120][121][122][123][124]. The regularly ordered photonic crystals meant that it was difficult for the incident light to escape but was easily trapped inside the crystals when entering through them, and resulted in a multitude of reflections and diffractions.…”

Section: Multi-dimensional Semiconductor Materialsmentioning

confidence: 99%

Nano-/microstructure improved photocatalytic activities of semiconductors

Zhao

Jiang

2013

Phil. Trans. R. Soc. A.

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Photocatalysis has emerged as a promising technique owing to its valuable applications in environmental purification. With the demand of building effective photocatalyst materials, semiconductor investigation experienced a developing process from simple chemical modification to complicated morphology design. In this review, the general relationship between morphology structures and photocatalytic properties is mainly discussed. Various nano-/microsized structures from zero-to three-dimensional are discussed, and the photocatalytic efficiency correspon-ding to the structures is analysed. The results showed that simple structures can be easily obtained and can facilitate chemical modification, whereas one-or three-dimensional structures can provide structureenhanced properties such as surface area increase, multiple reflections of UV light, etc. Those principles of structure-related photocatalytic properties will afford basic ideology in designing new photocatalytic materials with more effective catalytic properties.

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“…In previous experiments on 3D photonic crystals, the inhibition was limited to a few percent by the small dielectric constants [15], and was confined to less than 45% by fabricating strongly interacting photonic crystals with high dielectric contrasts [16]. Recently, sandwich structures with superior optical properties were constructed by engineering a planar defect between two photonic crystals [17][18][19][20], which may contribute to the modification of the spontaneous emission from dye molecules or semiconductor quantum dots embedded inside the planar defect. It was well known that high-intensity excitation is very important for the enhancement of spontaneous and stimulated emission.…”

Section: Introductionmentioning

confidence: 99%

Engineering a light-emitting planar defect within three-dimensional photonic crystals

Liu

Chen²,

Ye³

2009

Science and Technology of Advanced Materials

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Sandwich structures, constructed from a planar defect of rhodamine-B (RhB)-doped titania (TiO 2 ) and two photonic crystals, were synthesized via the self-assembly method combined with spin-coating. The modification of the spontaneous emission of RhB molecules in such structures was investigated experimentally. The spontaneous emission of RhB-doped TiO 2 film with photonic crystals was reduced by a factor of 5.5 over a large bandwidth of 13% of the first-order Bragg diffraction frequency when compared with that of RhB-doped TiO 2 film without photonic crystals. The angular dependence of the modification and the photoluminescence lifetime of RhB molecules demonstrate that the strong and wide suppression of the spontaneous emission of the RhB molecules is due to the presence of the photonic band gap.

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Dielectric Planar Defects in Colloidal Photonic Crystal Films

Cited by 123 publications

References 24 publications

Introducing Defects in 3D Photonic Crystals: State of the Art

Introducing Defects in 3D Photonic Crystals: State of the Art

Nano-/microstructure improved photocatalytic activities of semiconductors

Engineering a light-emitting planar defect within three-dimensional photonic crystals

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