Colloidal photonic superlattices

Rengarajan, R.; Jiang, Peng; Larrabee, D. C.; Colvin, Vicki L.; Mittleman, Daniel M.

doi:10.1103/physrevb.64.205103

Cited by 82 publications

(97 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It should be noted that some splitting is observed in the Bragg peak of the BA structure, which is not evident in that of the AB. The splitting in the spectrum of the BA structure is attributed to interface effects, as observed by Rengarajan et al 4 and is further complicated in appearance by overlapping Fabry-Pérot oscillations. The interface effects can be thought as arising due to the layer containing the smaller particles "sagging" into the hollows formed by the layer of larger particles, hence distorting the structure at the interface via the superposition of a periodicity on a larger scale.…”

mentioning

confidence: 59%

“…7,8 Optical studies on multilayer systems have to date focused on transmission spectra to define their optical properties. Rengarajan et al 4 utilized transmission spectroscopy to detect midgap states engineered within a multilayer photonic crystal. Jiang et al 5 studied multilayer systems of particles with overlapping optical responses to observe a broadened stop band within the transmission spectra.…”

mentioning

confidence: 99%

“…Recently there has been considerable interest in the formation of films of synthetic opals because of their possible application in photonics. [1][2][3] The fabrication of multilayer systems using particles of differing diameters has been studied previously for both controlled evaporation [4][5][6] and the Langmuir-Blodgett ͑LB͒ method. 7,8 Optical studies on multilayer systems have to date focused on transmission spectra to define their optical properties.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Enhanced Bragg reflections from size-matched heterostructure photonic crystal thin films prepared by the Langmuir-Blodgett method

Bardosova

Pemble

Povey

et al. 2006

Applied Physics Letters

View full text Add to dashboard Cite

The Langmuir-Blodgett method was used to engineer photonic crystal thin films of an AB architecture. Structures were studied by transmittance and reflectance spectroscopies. For an AB structure in which the silica particle diameter B is twice that of A, reflectance features associated with the first order Bragg peak for the "A" domain are only observed when the structure is probed from the A side of the structure. Furthermore, this feature is enhanced in intensity compared to that for a structure consisting solely of A particles. These findings are attributed to a matching of first and second order Bragg processes. (c) 2006 American Institute of Physics. (DOI:10.1063/1.2339031

show abstract

mentioning

confidence: 59%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Enhanced Bragg reflections from size-matched heterostructure photonic crystal thin films prepared by the Langmuir-Blodgett method

Bardosova

Pemble

Povey

et al. 2006

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

“…[119,120] Qualitative correspondence between normal incidence spectroscopy data and scalar wave approximation simulations supported the presence of superlattice effects (Fig. 13).…”

Section: D Embedded Defects Via Multistep Proceduresmentioning

confidence: 86%

“…13). [120] Similarly, Persoons and co-workers incorporated the first 2D embedded planar defect within a CC using a multistep colloidal growth process. [121,122] This structure consisted of two colloidal multilayers sandwiching an embedded monolayer of larger spheres.…”

Section: D Embedded Defects Via Multistep Proceduresmentioning

confidence: 99%

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

2006

View full text Add to dashboard Cite

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...

show abstract