منابع مشابه
Optical Absorption Spectra of Bipolarons
The absorption of large bipolarons is investigated using the path-integral method. The response of a bipolaron to an external electromagnetic field is derived in the framework of the memory function approach. The bipolaron optical absorption spectrum consists of a series of relatively narrow peaks. The peculiarities of the bipolaron optical absorption as a function of the frequency of the elect...
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Measuring optical spectra of chromophore molecules entrapped in liposomes can lead to considerable distortion because of absorption flattening. This phenomenon is analyzed theoretically, and it is shown that the deviation from the Beer-Lambert law becomes larger as the molar absorptivity of the chromophore increases and as the number of entrapped molecules becomes larger. The theoretical equati...
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The optical excitations in C70 and higher fullerenes, including isomers of C76, C78, and C84, are theoretically investigated. We use a tight binding model with long-range Coulomb interactions, treated by the Hartree-Fock and configuration-interaction methods. We find that the optical excitations in the energy region smaller than about 4 eV have most of their amplitudes at the pentagons. The osc...
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Optical absorption spectra of C 60 are theoretically investigated in order to analyze the optical properties of alkali metal doped fullerites A6C60. We use a tight binding model with long ranged Coulomb interactions and bond disorder. Optical spectra are obtained by the Hartree-Fock approximation and the CI method. The Coulomb interaction parameters which are relevant to the optical spectra of ...
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Photoacoustic (PA) microscopy (PAM) can image optical absorption contrast with ultrasonic spatial resolution in the optical diffusive regime. Conventionally, accurate quantification in PAM requires knowledge of the optical fluence attenuation, acoustic pressure attenuation, and detection bandwidth. We circumvent this requirement by quantifying the optical absorption coefficients from the acoust...
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ژورنال
عنوان ژورنال: Journal of Physics: Condensed Matter
سال: 1997
ISSN: 0953-8984,1361-648X
DOI: 10.1088/0953-8984/9/7/025