Reflectivity spectra of gold- and silver-infiltrated opals

Voĭnov, Yu. P.; Горелик, В. С.; Zlobina, L. I.; Филатов, Владимир Владимирович

doi:10.1134/s0020168509100100

Cited by 4 publications

(5 citation statements)

References 3 publications

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“…1(b)), to the silver permittivity, but this calculation does not consider the different optical phase conditions associated with metals and dielectrics that arise on reflection between the layers of the structure. However, the result is similar to that obtain by Voinov et al 20 Note that this method works for material that does not have absorption factors (3 00 ) in their permittivity expression, such as oxides.…”

Section: Optical Investigationssupporting

confidence: 86%

Fabrication and characterization of three-dimensional silver/air inverted opal photonic crystals

Corbett

Newcomb²,

Pemble

2010

J. Mater. Chem.

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Photonic crystals made from noble metals such as silver are an interesting class of material for many applications such as chemical sensing, solar cells or photonics. Their fabrication suffers from a lack of reproducibility, and complicated and aggressive processes. In this paper we show a simple and reproducible method based on the black and white photography process, to get a self standing 3D silver photonic crystal. Their characterization by SEM and TEM allowed us to interpret the process, and optical analysis made in reflection and transmission were used to find out eventual coupling between surface plasmon polaritons and the photonics properties of the structure itself.

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Section: Optical Investigationssupporting

confidence: 86%

Fabrication and characterization of three-dimensional silver/air inverted opal photonic crystals

Corbett

Newcomb²,

Pemble

2010

J. Mater. Chem.

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“…Examined model of the infiltrated PC is closely analogous to the opal PC infiltrated with different liquids and solids. 69,[77][78][79][80][81][82][83][84] Therefore, the condition of highly efficient PC pumping Eq. (8) could be used for the three-dimensional case, when it is adjusted for the interactions between the different polarization states.…”

Section: B Enhanced Nonlinear Conversion In the Infiltrated Pcmentioning

confidence: 99%

“…By infiltrating the opal globular PCs with liquids or solids, we could modify the optical and nonlinear properties of the system. 69,[77][78][79][80][81][82][83][84] We should note that the first PC model (Table I) is chosen to equal the empty opal PC, and second one represents the opal PC matrix infiltrated with nonlinear solid media with higher refractive indexes compared to the globules, e.g., NaNO 2 , LiNbO 3 or BaTiO 3 . It is expected that all the dependencies observed for these PC models could be generalized to the three-dimensional cases by adjusting the interaction between different states of the light polarization because the physical reason of the structural light focusing effect is linked with the curvature of particles and their periodic distribution inside the PC structure.…”

Section: A Model Of Pc Structuresmentioning

confidence: 99%

Band-gap nonlinear optical generation: The structure of internal optical field and the structural light focusing

Zaytsev

Katyba

Yakovlev

et al. 2014

Journal of Applied Physics

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A novel approach for the enhancement of nonlinear optical effects inside globular photonic crystals (PCs) is proposed and systematically studied via numerical simulations. The enhanced optical harmonic generation is associated with two- and three-dimensional PC pumping with the wavelength corresponding to different PC band-gaps. The interactions between light and the PC are numerically simulated using the finite-difference time-domain technique for solving the Maxwell's equations. Both empty and infiltrated two-dimensional PC structures are considered. A significant enhancement of harmonic generation is predicted owing to the highly efficient PC pumping based on the structural light focusing effect inside the PC structure. It is shown that a highly efficient harmonic generation could be attained for both the empty and infiltrated two- and three-dimensional PCs. We are demonstrating the ability for two times enhancement of the parametric decay efficiency, one order enhancement of the second harmonic generation, and two order enhancement of the third harmonic generation in PC structures in comparison to the nonlinear generations in appropriate homogenous media. Obviously, the nonlinear processes should be allowed by the molecular symmetry. The criteria of the nonlinear process efficiency are specified and calculated as a function of pumping wavelength position towards the PC globule diameter. Obtained criterion curves exhibit oscillating characteristics, which indicates that the highly efficient generation corresponds to the various PC band-gap pumping. The highest efficiency of nonlinear conversions could be reached for PC pumping with femtosecond optical pulses; thus, the local peak intensity would be maximized. Possible applications of the observed phenomenon are also discussed.

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“…Gorelik [5,36] and Voinov et al [37] developed an effective technique for obtaining the spectrum of the band gaps of photonic crystals with high spatial reso lution using fiber optics. It involves a local analysis of broadband reflection spectra of the (111) surface of a three dimensional photonic crystal at normal inci dence of light on this surface and in backscattering geometry.…”

Section: Introductionmentioning

confidence: 99%

“…The objectives of this study were to produce new types of opal matrix (OM) nanocomposites contain ing iron group refractory metal (M = Ni, Co, Fe) nanoparticles prepared by reducing appropriate salts or oxides with supercritical alcohols [32][33][34][35] and to obtain broadband reflection spectra of the (111) sur face of the photonic crystals using a fiber optic tech nique developed previously [5,36,37] for measuring reflection spectra, in order to find characteristics of the band gaps of the nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Opal-matrix nanocomposites containing metallic nanoparticles

2015

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A method has been proposed for the fabrication of three dimensional photonic crystals based on ordered opal matrices (OMs), with pores containing iron group metal (M = Ni, Co, Fe) nanoparticles. The core of the method is the reduction of salts and oxides of these metals with supercritical isopropanol. The phase composition of OM/M composites depends on the composition of the starting salts (nitrates or chlo rides): the use of ferric chloride leads to the formation of nanoparticles of solid solutions based on nickel metal, α cobalt, or β cobalt (Ni-Fe and Co-Fe systems) in opal pores; with the corresponding nitrates, we obtain OM/NiCo (cubic solid solution), OM/Fe, OM/Ni 3 Fe, OM/NiFe, OM/CoFe, and OM/NiCoFe nanocomposites. We have measured broadband reflection spectra of the (111) surface of the photonic crystals using a fiber optic technique for taking reflection spectra. The intensity peak in the reflection (band gap) spectrum of the OM/M (M = Fe, Co, Ni) nanocomposites is shown to be shifted to longer wavelengths.

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Reflectivity spectra of gold- and silver-infiltrated opals

Cited by 4 publications

References 3 publications

Fabrication and characterization of three-dimensional silver/air inverted opal photonic crystals

Fabrication and characterization of three-dimensional silver/air inverted opal photonic crystals

Band-gap nonlinear optical generation: The structure of internal optical field and the structural light focusing

Opal-matrix nanocomposites containing metallic nanoparticles

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