Optical responses in single-crystalline organic microcavities

Kondo, Hisao; Yamamoto, Yoshiro; Takeda, Atsushi; Yamamoto, S.; Kurisu, Hiroki

doi:10.1016/j.jlumin.2007.12.011

Cited by 18 publications

(24 citation statements)

References 8 publications

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“…[2][3][4][5][6] More recently, a number of experimental studies have focused their attention on polycrystalline and crystalline materials, featuring a more ordered structure and optical properties usually dominated by vibronic progressions. The growth of very ordered samples, up to the very recent creation of anthracene-based single-crystal microcavities, 7,8 has allowed the observation of different phenomena arising from the strong optical anisotropy of organic crystals. [9][10][11][12] On the other side, vibronic replicas have been strongly coupled to light, with the consequent observation of three ͑or more͒ polariton dispersion relations.…”

Section: Introductionmentioning

confidence: 99%

Organic-based microcavities with vibronic progressions: Photoluminescence

2009

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We theoretically study the photoluminescence properties of organic-based microcavities with vibronic progressions. We analyze the relaxation from the exciton reservoirs to the polariton anticrossing region; the presence of vibronic levels qualitatively enriches the physics of the system with the appearance of new decay channels. The relaxation dynamics is studied with a master equation and the cavity photoluminescence is obtained from the polariton stationary population. We show that the exciton radiative recombination in which a molecule ends up in a vibrationally excited level of the electronic ground state can lead to qualitatively new features in the cavity luminescence spectrum.

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Section: Introductionmentioning

confidence: 99%

Organic-based microcavities with vibronic progressions: Photoluminescence

2009

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“…Some papers have also been published investigating the polariton modes formed by pairwise interaction between exciton and ͑lateral͒ photon modes of like spatial symmetry in semiconductor MCs with 2D optical confinement. 20 In a recently published paper Kondo et al 21 report the observation of multiple peaks in the transmission spectra of singlecrystalline organic MC. The dispersion relations for the cavity polaritons are obtained at normal incidence as a function of thickness of the MC.…”

Section: Introductionmentioning

confidence: 99%

Intersubband cavity polaritons: The role of higher photonic modes

Załużny

Ziętkowski

2009

Phys. Rev. B

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We present a theoretical analysis of the consequence of coupling between higher photonic modes and intersubband excitations in microcavities with embedded multiple quantum wells ͑MQWs͒. The polariton dispersion relations and angle-resolved absorption spectra are calculated numerically using a semiclassical approach based on a transfer-matrix formulation and effective-medium approximation. The obtained results are interpreted employing a multiple coupled harmonic-oscillator model supplemented by the input-output formalism. We show that when the MQW occupies a large fraction of space between cavity mirrors the coupling with higher photonic modes cannot be considered as a negligibly small perturbation in formation of the intersubband cavity polariton modes. When appropriate conditions are fulfilled the coupling between higher photonic modes and so-called "dark" intersubband electronic excitations can lead, in accordance with experimental results, to the formation of complex multiple-peaked absorption spectra.

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“…This is acceptable only for transparent range in which the extinction coefficient is negligible. Most of the lower cavity polariton modes are located in the transparent range, so that the facilitated calculation allows us to apply solely to the lower polariton range [5]. On the basis of the assumption, the best fitted parameters were obtained: E T = 3.154 eV, Δ LT = 19 meV and ε r = 2.4 for a-polariton, E T = 3.122 eV, Δ LT = 51 meV and ε r = 3.2 for b-polariton.…”

Section: Resultsmentioning

confidence: 99%

“…Consequently, we developed the organic microcavity composed of a single crystalline anthracene film [4,5]. Since anthracene belonging to monoclinic system is biaxial crystal, it shows intensively anisotropic response.…”

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Cavity polariton dispersion of a single‐crystalline anthracene film embedded in a microcavity

Kondo

Tongu

Yamamoto

et al. 2008

Phys. Status Solidi (c)

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We study anisotropic behavior of cavity polaritons in an organic microcavity composed of a single crystalline anthracene film grown into the gap of the Fabry‐Perot cavity by a method through capillary action. The anisotropic response of the cavity polariton appeared on the spectra depending on the linear polarized directions; two kinds of the polarization correspond to the principal axes of anthracene crystal. Transmission spectra were measured with various thickness of the anthracene film. The peak‐shift of the lower polariton mode depending on the thickness was obviously observed, whereas that of the upper polariton mode was not clearly observed be cause of the complicated shape of the spectra. This behavior for the upper polariton mode was analyzed on the basis of the convolution between the spectra of the cavity mode and the absorption due to the vibronic transition in anthracene. Cavity‐polariton dispersion as a function of thickness was obtained from peak‐shift on the spectra. Each thickness was determined by spectral fitting through calculation using the transfer matrix theory. Large vacuum Rabi splitting energies of this system were obtained from the dispersion as 0.20 and 0.34 eV for two kinds of the polarizations. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Optical responses in single-crystalline organic microcavities

Cited by 18 publications

References 8 publications

Organic-based microcavities with vibronic progressions: Photoluminescence

Organic-based microcavities with vibronic progressions: Photoluminescence

Intersubband cavity polaritons: The role of higher photonic modes

Cavity polariton dispersion of a single‐crystalline anthracene film embedded in a microcavity

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