Optical Properties of Anthracene Single Crystals

Matsui, Atsuo; Ishii, Yusuke

doi:10.1143/jpsj.23.581

Cited by 43 publications

(20 citation statements)

References 15 publications

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“…Therefore, the radius 50 A is sufficient for our purpose. This value is reasonable, compared with that calculated by Matsui 42 for anthrancene. Consideration of electron density did not cause much difference in the results in comparison with the case in which the charge was distributed uniformly at the atomic sites.…”

Section: Oscillator Strength Obtained From Reflection Spectrasupporting

confidence: 89%

Anisotropic Absorption and Reflection Spectra of Poly(ethylene terephthalate) Films in Ultraviolet Region

Ouchi

1983

Polym J

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ABSTRACT:Thin uniaxially drawn poly( ethylene terephthalate) films (down to 0.1 flm thickness) were prepared. Their absorption spectra showed clear dichroism having peaks at 300 (.l), 243 (/ /) and 197 nm (/ 1). Analysis of the reflection spectra of thick films by means of the Kramers-Kronig conversion gave absorption spectra almost identical with those obtained from direct absorption measurement. Spectral shapes and possible origins of the vibrational structures were qualitatively discussed. The oscillator strength of each band was obtained on the simple oriented gas model with or without the Lorentz field correction to examine effects of molecular aggregation. PPP calculations with CI were made by use of a model compound, and four 1 A•-> 1 Bu allowed transitions were predicted to occur at 4.66, 5.27, 6.33 and 6.44eV. The latter two transitions were actually observed at 6.2eV. The calculated transition moments suggested the existence of the cis form of carbonyl groups in oriented amorphous phases.

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Section: Oscillator Strength Obtained From Reflection Spectrasupporting

confidence: 89%

Anisotropic Absorption and Reflection Spectra of Poly(ethylene terephthalate) Films in Ultraviolet Region

Ouchi

1983

Polym J

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“…14,15 An orthorhombic dielectric tensor was used with z0 = 2.9, while y0 ϵ a and x0 ϵ b were taken from Ref. 16. An exact calculation accounting for the monoclinic structure would require knowledge of the frequency dependent Euler angles.…”

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confidence: 99%

Resonant Rayleigh scattering from an anisotropic organic single-crystal microcavity

2008

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Resonant Rayleigh scattering ͑RRS͒ is observed upon excitation of a microcavity containing a single crystal of the organic molecule anthracene. The RRS profile is obtained for a range of excitation energies and angles. In contrast to the circular profile observed for inorganic microcavities, the scattered light pattern is elliptical when projected normal to the sample surface. The profile shape provides a direct visual representation of the anisotropic microcavity polariton dispersion characteristic of organic crystals.

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“…Other workers 5 • 6 have not observed such lines in their reflection studies, but this may have been due to the high temperatures (298, nOK) and the inadequate resolution used by them. In view of the importance of this question we have investigated the reflection spectra of anthracene crystals of different thicknesses and from different sources at high resolution and low temperature.…”

Section: Introductionmentioning

confidence: 93%

“…Specifically, following Rashba and Gurgenishvili,58 the oscillator strength of the transition to the bound exciton state and the oscillator strength of the transition to the intrinsic exciton band are related by (6) where E is the binding energy of the exciton to the impurity or defect state, Eo is (21i}/m*) ('IT/Q o )2/3, where m* is the effective mass of the intrinsic exciton, and Q o is the volume of the unit cell. In this region of the spectrum there is strong pumping of the oscillator strength of the transition to the exciton band to the transitions to defect levels.…”

Section: Intensities Of the Diminished Reflectance (Defect) Linesmentioning

confidence: 99%

Study of the Reflection Spectrum of Crystalline Anthracene: Evidence for the Existence of Defects

Morris

Rice

Martin

1970

The Journal of Chemical Physics

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Zerophonon lines in the singlet spectrum of the charge transfer crystal anthracenePMDA: Experimental evidence and model calculations J. Chem. Phys. 67, 4076 (1977); 10.1063/1.435383Reflection spectrum of the first singlet transition of crystalline anthracene at low temperatures This paper reports the results of a study of the reflection spectrum of crystalline anthracene at 4 and 77°K. At 4°K the reflection spectrum has, on the low-energy side of the transition to the first exciton state, a number of narrow regions of low reflectivity. At 77°K these antireflection lines do not appear. A crystal may be cycled repetitively between 4 and 77°K, reversibly exhibiting this phenomenon. It is argued that the observed antireflection lines are associated with exciton states bound to lattice defects, and that the lattice defects arise because of the inclusion of chemical impurities in the crystal. The observed antireflection lines can be correlated with lines in the low-energy emission spectrum of anthracene; our data are sufficient to resolve some previous difficulties of interpretation in the assignment of the luminescence spectrum. Some aspects of the interpretation of the Iinewidths and line intensities, and of the relationship between_the bound excitons and the free exciton band, are discussed.

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Optical Properties of Anthracene Single Crystals

Cited by 43 publications

References 15 publications

Anisotropic Absorption and Reflection Spectra of Poly(ethylene terephthalate) Films in Ultraviolet Region

Anisotropic Absorption and Reflection Spectra of Poly(ethylene terephthalate) Films in Ultraviolet Region

Resonant Rayleigh scattering from an anisotropic organic single-crystal microcavity

Study of the Reflection Spectrum of Crystalline Anthracene: Evidence for the Existence of Defects

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