Fabrication and optical properties of photonic crystals based on opal-GaP and opal-GaPN composites

Gadzhiev, G. M.; Голубев, В. Г.; Zamoryanskaya, M. V.; Kurdyukov, D. A.; Medvedev, А. V.; Merz, J. L.; Mintairov, A. M.; Певцов, А. Б.; Sel’kin, A. V.; Travnikov, V. V.; Шаренкова, Н. В.

doi:10.1134/1.1634661

Cited by 9 publications

(4 citation statements)

References 13 publications

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“…One example is chemical bath deposition (CBD) and its modifications. These methods have been employed for filling bulk opals with metals, , semiconductors, ,− and oxides . Using neutron and synchrotron diffractometry, it was previously − shown that solution methods could synthesize a nanocomposite material in amounts up to several cubic centimeters, providing a uniform distribution and a constant phase composition of the filler in the template pores.…”

Section: Introductionmentioning

confidence: 99%

Opal-Hematite and Opal-Magnetite Films: Lateral Infiltration, Thermodynamically Driven Synthesis, Photonic Crystal Properties

et al. 2008

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Hematite (R-Fe 2 O 3 ) was infiltrated into opal film pores without depositing the oxide onto the outer film surface by the developed method of lateral infiltration of an aqueous solution of iron nitrate under capillary forces. The thermodynamically driven syntheses of either Fe 3 O 4 (magnetite) or R-Fe were performed in the opal pores using R-Fe 2 O 3 as a precursor. The opal-R-Fe 2 O 3 and opal-Fe 3 O 4 films were characterized by scanning electron microscopy, X-ray diffraction, reflectance, and transmittance measurements. The photonic band gap red-shifted gradually as the number of lateral infiltration runs increased. The maximum filling degrees both of opal-R-Fe 2 O 3 and of opal-Fe 3 O 4 films, calculated from the reflection spectra, appeared to be similar and equal to ∼55% of the pore volume because of very close values of molar volumes of the oxides. It was found that the reversible chemical transformation of fillers in opal pores R-Fe 2 O 3 T Fe 3 O 4 T R-Fe 2 O 3 changes only the filler dielectric constant but does not practically produce structural defects that could affect the photonic crystal properties of the composite. A combination of lateral infiltration technique and thermodynamically driven synthesis is a cost-effective approach to produce three-dimensional photonic crystals based on opal films filled with A 3 B 5 , A 2 B 6 , and A 4 B 6 semiconductors, oxides, and metals.

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Section: Introductionmentioning

confidence: 99%

Opal-Hematite and Opal-Magnetite Films: Lateral Infiltration, Thermodynamically Driven Synthesis, Photonic Crystal Properties

et al. 2008

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“…Over the past few years, increasing attention has been paid to porous GaP layers due to their strongly enhanced photoresponse, ability to support Fröhlich-type surface vibrations and enhanced nonlinear optical properties [1][2][3][4]. GaP is considered as prospective material for manufacturing photonic crystals for the visible spectral range [5,6]. It is well known that III-V compounds possess second-order nonlinear optical coefficients several orders of magnitude higher than those of KDP, ADP and other materials used in frequency upconversion.…”

Section: Introductionmentioning

confidence: 99%

Artificial birefringence introduced by porosity in GaP

Ursaki

Syrbu

Albu

et al. 2005

Semicond. Sci. Technol.

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Porosity-induced birefringence in a GaP membrane is studied using a method based on the analysis of beats in unpolarized and polarized transmittance spectra as well as in angular dependence of optical spectra. Birefringence as high as n e − n o = 0.25 was measured in a porous GaP membrane with the degree of porosity close to 40%. The measured values of n e and n o are compared with those calculated in the frame of effective medium theory for a GaP membrane with appropriate morphology.

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“…The dashed curves connect the experimental points for the positions of the minima in the doublets. The interception of the solid and dashed curves corresponds to the wavelength (λ = λ * ) and the incidence angles (θ = θ * ), at which the diffraction conditions are fulfilled simultaneously for the (111) planes parallel to the sample surface and for the similar planes inclined to it [12,13,20]. When the opal lattice is formed by spherical balls, the interception coordinates must obey the following relation [20]:…”

mentioning

confidence: 99%

“…This leads to higher ε a values. Therefore, the effect of thermal treatment on ε a should be taken into account in a quantitative analysis of the Bragg reflection spectra of opalsemiconductor composites, since their synthesis requires fairly high temperatures [16,20]. The use of the dielectric constant of initial opal for the characterization of opal-semiconductor composites [12] may lead to a certain error in the final parameters.…”

mentioning

confidence: 99%

Effect of annealing on parameters of synthetic opal

2006

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We report on the effect of high temperature annealing on the reflection spectra of synthetic opals. The analysis of conditions for simultaneous diffraction on the (111) planes parallel and inclined to the sample surface has shown that both annealed and unannealed opals are compressed along the growth [111] axis and the shape of the SiO2 balls forming the opals’ close packed structure can be described as spheroidal. The structure parameters were evaluated from the analysis of the angular dependences of the peak positions in the Bragg reflection spectra of unfilled and glycerol-filled samples. The major effect of annealing is due to the sintering (interpenetration) of the structural elements of opals. The maximum temperature of 1050 °C leads to a 10-fold increase in the degree of spheroid sintering. As a result, the interspheroid spacing decreases by over 10%, while the filling factor increases from 0.75 to 0.96 together with the effective dielectric constant of the opal as a whole (from 1.74 to 2.08). Sintering takes place not only between spheroids, but also inside spheroids between the α-SiO2 nanoparticles constituting them. This results in a noticeable (by ∼7%) increase in the dielectric constant of opal spheroids.

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Fabrication and optical properties of photonic crystals based on opal-GaP and opal-GaPN composites

Cited by 9 publications

References 13 publications

Opal-Hematite and Opal-Magnetite Films: Lateral Infiltration, Thermodynamically Driven Synthesis, Photonic Crystal Properties

Opal-Hematite and Opal-Magnetite Films: Lateral Infiltration, Thermodynamically Driven Synthesis, Photonic Crystal Properties

Artificial birefringence introduced by porosity in GaP

Effect of annealing on parameters of synthetic opal

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