Light emission in a directional photonic bandgap

Romanov, S. G.; Chigrin, Dmitry N.; Solovyev, V. G.; Maka, T.; Gaponik, Nikolai; Eychmüller, Alexander; Rogach, Andrey L.; Torres, C. M. Sotomayor

doi:10.1002/pssa.200303113

Cited by 25 publications

(21 citation statements)

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“…[9] Within their approach, it is difficult to introduce defects in a controlled manner and therefore avoid disorder or stacking faults. [19] The few lattice constants or disorder related effects did not allow distinct and coincident experiments [15,20,21] concerning the inhibition of spontaneous emission so far. Alternative fabrication methods for an extended photonic crystal as well as three-dimensional structures for other applications are highly desirable.…”

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confidence: 99%

Large‐Area Three‐Dimensional Structuring by Electrochemical Etching and Lithography

Müller²,

et al. 2004

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Optical Characterization of the Samples: Absorption spectra were recorded in the 200±900 nm range using a Lambda 9000 Perkin-Elmer spectrophotometer. The samples were diluted by a factor of around 100 in DEG; the dilution factors slightly differed for the different samples in order to ensure analysis of solutions with the same concentrations of oxide particles (0.028 mg mL ±1 ). This allows comparison of samples with the same oxide concentration diluted in the same solvent.The UV excitation and emission spectra were measured at room temperature with a broad excitation at 325 nm. The excitation source was a 450 W xenon lamp coupled to an Hitachi Jobin±Yvon monochromator with a 300 groves mm ±1 grating. The detected emission was transferred by an optical fiber, placed at 45 to the sample, and recorded by an air-cooled charge-coupled device camera. All the samples with the same size oxide particles (either oxide colloids, gold/oxide nanocomposites, or gold/oxide mixtures) have been diluted in DEG before characterization to obtain the same concentration of Tb 3+ -doped Gd 2 O 3 in mass of oxide per mL. For the solutions containing oxide particles with a diameter of 3 nm, the concentration of oxide was 2.8 mg mL ±1 , and for those containing particles with a diameter of 8 nm, the concentration of oxide was 18.9 mg mL ±1 . Finally, the emission spectra were systematically corrected from the white luminescence due to the emission of the DEG and the quartz container.

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confidence: 99%

Large‐Area Three‐Dimensional Structuring by Electrochemical Etching and Lithography

Müller²,

et al. 2004

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“…Such emission suppression is conveniently observed in opal-based 3D PhCs impregnated with light emitters. [37][38][39] In contrast, if the light source is close to a PhC surface, it is not isolated from modes of free space, but subjected to the PhC local field, the magnitude of which is greatly enhanced in the PBG range. This increase in field magnitude is replicated in the increase in PL intensity.…”

Section: Discussionmentioning

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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“…The angular distribution of the far-field intensity depends on the topology of the iso-frequency surface of the crystal at the emission frequency (21)(22). In what follows, an infinite two-dimensional square lattice of air holes in a polymer background is considered.…”

Section: Numerical Examplementioning

confidence: 99%

“…Light emission in a photonic crystal has attracted a substantial attention both in theoretical [1,2,3,4,5,6,7,8,9,10,11,12] and experimental [13,14,15,16,17,18,19,20,21,22] studies. To a large extend this interest is due to potential perspectives of the emission modification and control provided by photonic crystals.…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution of the emission intensity in a photonic crystal: Self-interference of Bloch eigenwaves

Chigrin

2009

Phys. Rev. A

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The analysis of an angular distribution of the emission intensity of a two-level atom (dipole) in a photonic crystal reveals an enhancement of the emission rate in some observation directions. Such an enhancement is the result of the bunching of many Bloch eigenwaves with different wave vectors in the same direction due to the crystal anisotropy. If a spatial distribution of the emission intensity is considered, the interference of these eigenwaves should be taken into account. In this paper, the far-field emission pattern of a two-level atom is discussed in the framework of the asymptotic analysis the classical macroscopic Green function. Numerical example is given for a two-dimensional square lattice of air holes in polymer. The relevance of results for experimental observation is discussed.

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Light emission in a directional photonic bandgap

Cited by 25 publications

References 0 publications

Large‐Area Three‐Dimensional Structuring by Electrochemical Etching and Lithography

Large‐Area Three‐Dimensional Structuring by Electrochemical Etching and Lithography

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

Spatial distribution of the emission intensity in a photonic crystal: Self-interference of Bloch eigenwaves

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