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Exciton-like electromagnetic excitations in non-ideal microcavity supercrystals.

Rumyantsev V, Fedorov S, Gumennyk K, Sychanova M, Kavokin A - Sci Rep (2014)

Bottom Line: We study localized photonic excitations in a quasi-two-dimensional non-ideal binary microcavity lattice with use of the virtual crystal approximation.The effect of point defects (vacancies) on the excitation spectrum is investigated by numerical modelling.We obtain the dispersion and the energy gap of the electromagnetic excitations which may be considered as Frenkel exciton-like quasiparticles and analyze the dependence of their density of states on the defect concentrations in a microcavity supercrystal.

View Article: PubMed Central - PubMed

Affiliation: 1] Galkin Institute for Physics &Engineering, Donetsk 83114, Ukraine [2] Mediterranean Institute of Fundamental Physics, 00047 Marino, Rome, Italy.

ABSTRACT
We study localized photonic excitations in a quasi-two-dimensional non-ideal binary microcavity lattice with use of the virtual crystal approximation. The effect of point defects (vacancies) on the excitation spectrum is investigated by numerical modelling. We obtain the dispersion and the energy gap of the electromagnetic excitations which may be considered as Frenkel exciton-like quasiparticles and analyze the dependence of their density of states on the defect concentrations in a microcavity supercrystal.

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Dispersion  of electromagnetic excitations in the non-ideal two-dimensional two-sublattice system of microcavities for a) , ; b) , , c) , .
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f2: Dispersion of electromagnetic excitations in the non-ideal two-dimensional two-sublattice system of microcavities for a) , ; b) , , c) , .

Mentions: In (10) the overlap characteristic of optical fields A11(22)(d) defines the transfer probability of electromagnetic excitation between the nearest neighbors in the first (second) sublattice, and A12(21)(0) is the excitation transfer probability between cavities in the first (second) and second (first) sublattices in an arbitrary cell. Substitution of expressions (10) for Lαβ(k) into Eq. (8) gives the dispersion law ω±(k) for electromagnetic excitations (Fig. 2a,b,c). We performed calculation for modeling frequencies of resonance photonic modes in the cavities of the first and second sublattices and respectively and for the overlap parameters of resonator optical fields , and . The lattice period was set equal to d = 3·10−7m.


Exciton-like electromagnetic excitations in non-ideal microcavity supercrystals.

Rumyantsev V, Fedorov S, Gumennyk K, Sychanova M, Kavokin A - Sci Rep (2014)

Dispersion  of electromagnetic excitations in the non-ideal two-dimensional two-sublattice system of microcavities for a) , ; b) , , c) , .
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4221797&req=5

f2: Dispersion of electromagnetic excitations in the non-ideal two-dimensional two-sublattice system of microcavities for a) , ; b) , , c) , .
Mentions: In (10) the overlap characteristic of optical fields A11(22)(d) defines the transfer probability of electromagnetic excitation between the nearest neighbors in the first (second) sublattice, and A12(21)(0) is the excitation transfer probability between cavities in the first (second) and second (first) sublattices in an arbitrary cell. Substitution of expressions (10) for Lαβ(k) into Eq. (8) gives the dispersion law ω±(k) for electromagnetic excitations (Fig. 2a,b,c). We performed calculation for modeling frequencies of resonance photonic modes in the cavities of the first and second sublattices and respectively and for the overlap parameters of resonator optical fields , and . The lattice period was set equal to d = 3·10−7m.

Bottom Line: We study localized photonic excitations in a quasi-two-dimensional non-ideal binary microcavity lattice with use of the virtual crystal approximation.The effect of point defects (vacancies) on the excitation spectrum is investigated by numerical modelling.We obtain the dispersion and the energy gap of the electromagnetic excitations which may be considered as Frenkel exciton-like quasiparticles and analyze the dependence of their density of states on the defect concentrations in a microcavity supercrystal.

View Article: PubMed Central - PubMed

Affiliation: 1] Galkin Institute for Physics &Engineering, Donetsk 83114, Ukraine [2] Mediterranean Institute of Fundamental Physics, 00047 Marino, Rome, Italy.

ABSTRACT
We study localized photonic excitations in a quasi-two-dimensional non-ideal binary microcavity lattice with use of the virtual crystal approximation. The effect of point defects (vacancies) on the excitation spectrum is investigated by numerical modelling. We obtain the dispersion and the energy gap of the electromagnetic excitations which may be considered as Frenkel exciton-like quasiparticles and analyze the dependence of their density of states on the defect concentrations in a microcavity supercrystal.

Show MeSH
Related in: MedlinePlus