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          -dimensional photonic crystals from Langmuir-Blodgett colloidal multilayers

Romanov, S. G.; Bardosova, Maria; Pemble, Martyn E.; Torres, C. M. Sotomayor

doi:10.1063/1.2234568

Cited by 36 publications

(42 citation statements)

References 18 publications

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“…No deviation from the diffraction model was observed in the LB crystal, indicating its 1D PBG structure in this wavelength range. Since the sphere monolayers in LB crystals are well ordered, 12 the loss of all but one zero diffraction order in the LB crystal can be explained by the absence of a 3D ordering in its lattice ͓Fig. 1͑b͔͒.…”

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confidence: 99%

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Erasing diffraction orders: Opal versus Langmuir-Blodgett colloidal crystals

Romanov

Bardosova

Whitehead

et al. 2007

Applied Physics Letters

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The optical transmission of photonic crystals self-assembled from colloidal nanospheres in opals and assembled from two-dimensional colloidal crystals in a periodic stack by the Langmuir-Blodgett technique has been compared. Elimination of all related zero order diffraction resonances other than that from growth planes and broadening and deepening of the remaining one-dimensional diffraction resonance have been observed for samples prepared by the Langmuir-Blodgett approach, which are explained in terms of the partial disorder of a crystal lattice. (c) 2007 American Institute of Physics.(DOI:10.1063/1.2714198

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confidence: 99%

“…Recently we demonstrated that LB crystals can be described as ͑2+1͒D PhCs. 12 This approach conveniently allows the separation of the spectral range into two parts. The 1D part spans over the wavelength range ഛ2D, where D is the diameter of spheres.…”

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confidence: 99%

Erasing diffraction orders: Opal versus Langmuir-Blodgett colloidal crystals

Romanov

Bardosova

Whitehead

et al. 2007

Applied Physics Letters

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“…3͑a͔͒. The 2L and 5L coatings also possess the transmission minimum centered at 1093 nm due to the Bragg diffraction on a stack of sphere monolayers, 25 which is not shown in Fig. 3.…”

Section: Transmission Versus Emission Spectra Of Sandwich Structmentioning

confidence: 99%

“…2͒. 25,26 Angle-resolved transmission spectra were acquired by illuminating the structures with a collimated 1 mm in diameter beam of a white light from a tungsten lamp at different angles, , of incidence with respect to the film normal. Transmitted light was collected from a cone of about 2°of angular width.…”

Section: Experimental Techniquementioning

confidence: 99%

Modification of emission of CdTe nanocrystals by the local field of Langmuir–Blodgett colloidal photonic crystals

Romanov¹,

Bardosova

Povey

et al. 2008

Journal of Applied Physics

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A light source on the surface of a slab of 2+1-dimensional photonic crystal has been prepared by the Langmuir–Blodgett deposition of a colloidal crystal on top of a thin film containing CdTe nanocrystals. The directional enhancement of the light emission intensity in the spectral range of the photonic bandgap has been revealed through the comparative examination of the angle-resolved transmission, diffraction, and photoluminescence spectra of the prepared structures. Changes in the emission spectrum have been tentatively explained in terms of the acceleration of the radiative recombination due to the increase in the local field strength at photonic bandgap resonance and changes in the emission diagram—as arising from the wavelength dependence of the topology of the local field pattern.

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“…8,9 These minima were associated with excitation of optical eigenmodes of 2D PhC, which propagate in plane of a monolayer. The aim of this work is to demonstrate that similar effect can be observed in thin opal films.…”

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Understanding of transmission in the range of high-order photonic bands in thin opal film

Romanov¹,

Bardosova²,

Povey³

et al. 2008

Applied Physics Letters

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Diffraction in the face centered cubic lattice cannot explain some minima observed in the transmission spectra of self-assembled opal films. Here, we compared them with minima observed in the transmission spectra of a hexagonal close packed monolayer of spheres of the same diameter. The identity of the sphere packing on the surface of the opal film and in the sphere monolayer was demonstrated by the light diffraction at the sample surfaces. It was shown that excitation of surface propagating modes in the opal film is responsible for the formation of additional minima in opal film transmission. (C) 2008 American Institute of Physics. (DOI: 10.1063/1.2920443

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( 2 + 1 ) -dimensional photonic crystals from Langmuir-Blodgett colloidal multilayers

Abstract: Original citationRomanov, S. G., Bardosova, M., Pemble, M. and Torres, C. M. S. Type of publication Article (peer-reviewed)Link to publisher's version

Cited by 36 publications

References 18 publications

Erasing diffraction orders: Opal versus Langmuir-Blodgett colloidal crystals

Erasing diffraction orders: Opal versus Langmuir-Blodgett colloidal crystals

Modification of emission of CdTe nanocrystals by the local field of Langmuir–Blodgett colloidal photonic crystals

Understanding of transmission in the range of high-order photonic bands in thin opal film

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