Optical Properties of Colloidal Photonic Crystals Confined in Rectangular Microchannels

Langmuir ◽  
2003 ◽  
Vol 19 (8) ◽  
pp. 3479-3485 ◽  
Author(s):  
Hernán Míguez ◽  
San Ming Yang ◽  
Geoffrey A. Ozin
Keyword(s):  
Optical Properties ◽  
Photonic Crystals ◽  
Rectangular Microchannels ◽  
Colloidal Photonic Crystals

Controlled gradient colloidal photonic crystals and their optical properties

2013 ◽  
Vol 428 ◽  
pp. 9-17 ◽  
Author(s):  
He Huang ◽  
Junbo Chen ◽  
Ye Yu ◽  
Zengmin Shi ◽  
Helmuth Möhwald ◽  
...  
Keyword(s):  
Optical Properties ◽  
Photonic Crystals ◽  
Colloidal Photonic Crystals

From Opals to Optics: Colloidal Photonic Crystals

MRS Bulletin ◽  
2001 ◽  
Vol 26 (8) ◽  
pp. 637-641 ◽  
Author(s):  
Vicki L. Colvin
Keyword(s):  
Optical Properties ◽  
Photonic Crystals ◽  
Near Infrared ◽  
Photonic Bandgap ◽  
Length Scale ◽  
Ordered Arrays ◽  
Colloidal Photonic Crystals ◽  
Infrared Wavelengths

Over a decade ago, theorists predicted that photonic crystals active at visible and near-infrared wavelengths would possess a variety of exciting optical properties. Only in the last several years, however, have experimentalists begun to build materials that realize this potential in the laboratory. This lag between experiment and theory is primarily due to the to the challenges associated with fabricating these unique materials. As the term “crystal” suggests, these samples must consist of highly perfect ordered arrays of solids. However, unlike conventional crystals, which exhibit order on the angstrom length scale, photonic crystals must have order on the submicrometer length scale. In addition, many of the most valuable properties of photonic crystals are only realized when samples possess a “full” photonic bandgap. For such systems, large dielectric contrasts and particular crystal symmetries create a range of frequencies over which light cannot propagate. Realizing the nanoscopic architectures required to form such systems is a challenge for experimentalists. As a result, fabrication schemes that rely on lithographic techniques or spontaneous assembly have been a focus in the development of the field.

Monodispersepoly[BMA-co-(COPS-I)] Particles by Soap-Free Emulsion Copolymerization and Its Optical Properties as Photonic Crystals

2015 ◽  
Vol 15 (10) ◽  
pp. 7671-7678
Author(s):  
Ki Chang Lee ◽  
Hun Seung Choo
Keyword(s):  
Molecular Weight ◽  
Optical Properties ◽  
Zeta Potential ◽  
Photonic Crystals ◽  
The Other ◽  
Refractive Indices ◽  
Emulsion Copolymerization ◽  
Colloidal Photonic Crystals ◽  
Other Hand ◽  
Number Of Particles

In order to study the surfactant-free emulsion copolymerization of benzyl methacrylate (BMA) with sodium 1-allyloxy-2-hydroxypropane sulfonate (COPS-I) and the resulting optical properties, a series of experiments was carried out at various reaction conditions such as the changes of BMA concentration, COPS-I concentration, BMA concentration under a fixed COPS-I amount, initiator and divinyl benzene (DVB) concentration. All the latices showed highly monodispersed spherical particles in the size range of 144∼435 nm and the respective shiny structural colors from their colloidal photonic crystals. It is found that the changes in such polymerization factors greatly affect the number of particles and particle diameter, polymerization rate, molecular weight, zeta-potential, and refractive indices. The increase of number of particles led to the increased rate of polymerization and zeta-potential of the latices, on the other hand, to the decreased molecular weight. Refractive indices and the reflectivity increased with COPS-I concentration, on the other hand, and decreased with DVB concentration. Especially, refractive indices of the resulting poly[BMA-co-(COPS-I)] colloidal photonic crystals showed much higher values of 1.65∼2.21 than that of polystyrene, due to the formation of core–shell shaped morphology. Monodisperse and high refractive index of poly[BMA-co-(COPS-I)] particles prepared in this work could be used for the study in photonic crystals and electrophoretic display.

Linear and Nonlinear Optical Properties of Colloidal Photonic Crystals

2011 ◽  
Vol 112 (4) ◽  
pp. 2268-2285 ◽  
Author(s):  
Luis González-Urbina ◽  
Kasper Baert ◽  
Branko Kolaric ◽  
Javier Pérez-Moreno ◽  
Koen Clays
Keyword(s):  
Optical Properties ◽  
Photonic Crystals ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Colloidal Photonic Crystals ◽  
Linear And Nonlinear

Fabrication of Artificial Periodic Defects in Colloidal Photonic Crystals by Photolithography

2014 ◽  
Vol 665 ◽  
pp. 99-101
Author(s):  
Yong Qiang Zhao ◽  
Yu Song Zhi ◽  
Chao Rong Li ◽  
Xiao Bo Zhang
Keyword(s):  
Optical Properties ◽  
Electron Microscope ◽  
Photonic Crystals ◽  
Scanning Electron Microscope ◽  
Field Emission ◽  
Blue Shift ◽  
Colloidal Photonic Crystals ◽  
Scanning Electron

We introduce artificial periodic defects with required size in colloidal photonic crystals by a simple and inexpensive photolithography. The morphology of colloidal photonic crystals with defects is observed by field emission scanning electron microscope (SEM) and optical properties by UV-VIS spectra. We find that the periodic photoresist strips will cause a blue shift and the shift value depends on the the size of periodic photoresist strips.

scholarly journals STRUCTURE AND OPTICAL PROPERTIES OF HYBRID METAL-DIELECTRIC COLLOIDAL PHOTONIC CRYSTALS

2017 ◽  
Vol 3 ◽  
pp. 37 ◽  
Author(s):  
A. V. Cvetkov ◽  
V. I. Gerbreders ◽  
S. D. Khanin ◽  
A. E. Lukin ◽  
A. S. Ogurcovs ◽  
...  
Keyword(s):  
Optical Properties ◽  
Photonic Crystals ◽  
Magnetron Sputtering ◽  
Surface Plasmon ◽  
Optical Materials ◽  
Colloidal Crystals ◽  
Bragg Diffraction ◽  
Colloidal Photonic Crystals ◽  
Fabry Perot ◽  
Plasmon Polaritons

Metal-dielectric nanocomposite optical materials based on colloidal crystals have been prepared by electro-thermo-diffusion or magnetron sputtering of silver. Optical properties of these photonic crystals have been studied by angle-resolved reflectance and transmission spectroscopy. The interpretation of observed spectra has been made taking into account the Bragg diffraction, Fano resonance, Fabry-Perot resonance and surface plasmon-polaritons, which excitations contribute to the optical properties of plasmonic-photonic crystals.

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