Site-selective fluorescence spectroscopy in dye-doped polymers. I. Determination of the site-energy distribution and the single-site fluorescence spectrum

1993 ◽  
Vol 48 (12) ◽  
pp. 9058-9065 ◽  
Author(s):  
Jeung Sun Ahn ◽  
Yasuo Kanematsu ◽  
Takashi Kushida
Keyword(s):  
Fluorescence Spectroscopy ◽  
Energy Distribution ◽  
Fluorescence Spectrum ◽  
Single Site ◽  
Site Energy ◽  
Doped Polymers ◽  
Site Selective

Site selective fluorescence and purity of a rare earth garnet crystal

1981 ◽  
Vol 59 (16) ◽  
pp. 2441-2448 ◽  
Author(s):  
L. V. Haley ◽  
B. Jacquier ◽  
J. A. Koningstein
Keyword(s):  
Energy Transfer ◽  
Rare Earth ◽  
Fluorescence Spectroscopy ◽  
Fluorescence Spectrum ◽  
Experimental Results ◽  
Garnet Crystal ◽  
Excitation Spectra ◽  
Site Selective

Site selective fluorescence spectroscopy of a crystal of europium gallium garnet containing Cr3+ as an impurity has been carried out. An analysis of the experimental results reveals that the strongest fluorescence spectrum between 590.0 nm and 620.0 nm is due to emission from an Eu3+−Cr3+ pair. Fluorescences of farther removed pairs and that of Eu3+ occupying the 8-coordinated d site and 6-coordinated Ga3+ site are also assigned. Energy transfer between the various sites occurs while the excitation spectra for the R lines of Cr3+ show that extremely fast transfer takes place between the R2 and R1 levels.

The determination of the site‐energy distribution of organic molecules dissolved in glassy matrices

1981 ◽  
Vol 75 (8) ◽  
pp. 3669-3673 ◽  
Author(s):  
J. Fünfschilling ◽  
I. Zschokke‐Gränacher ◽  
D. F. Williams
Keyword(s):  
Energy Distribution ◽  
Organic Molecules ◽  
Site Energy ◽  
Glassy Matrices

scholarly journals Optical Characterization of Ultra-Thin Films of Azo-Dye-Doped Polymers Using Ellipsometry and Surface Plasmon Resonance Spectroscopy

Photonics ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 41
Author(s):  
Najat Andam ◽  
Siham Refki ◽  
Hidekazu Ishitobi ◽  
Yasushi Inouye ◽  
Zouheir Sekkat
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Spectroscopic Ellipsometry ◽  
Plasmon Resonance ◽  
Complex Refractive Index ◽  
Resonance Spectroscopy ◽  
Doped Polymers

The determination of optical constants (i.e., real and imaginary parts of the complex refractive index (nc) and thickness (d)) of ultrathin films is often required in photonics. It may be done by using, for example, surface plasmon resonance (SPR) spectroscopy combined with either profilometry or atomic force microscopy (AFM). SPR yields the optical thickness (i.e., the product of nc and d) of the film, while profilometry and AFM yield its thickness, thereby allowing for the separate determination of nc and d. In this paper, we use SPR and profilometry to determine the complex refractive index of very thin (i.e., 58 nm) films of dye-doped polymers at different dye/polymer concentrations (a feature which constitutes the originality of this work), and we compare the SPR results with those obtained by using spectroscopic ellipsometry measurements performed on the same samples. To determine the optical properties of our film samples by ellipsometry, we used, for the theoretical fits to experimental data, Bruggeman’s effective medium model for the dye/polymer, assumed as a composite material, and the Lorentz model for dye absorption. We found an excellent agreement between the results obtained by SPR and ellipsometry, confirming that SPR is appropriate for measuring the optical properties of very thin coatings at a single light frequency, given that it is simpler in operation and data analysis than spectroscopic ellipsometry.

scholarly journals Fluorescence spectroscopy for the determination of reconstitution time of an in-vial lyophilised product

2021 ◽  
Vol 597 ◽  
pp. 120368
Author(s):  
Khaled ElKassas ◽  
Krishnakumar Chullipalliyalil ◽  
Michael McAuliffe ◽  
Sonja Vucen ◽  
Abina Crean
Keyword(s):  
Fluorescence Spectroscopy

Adsorption of levofloxacin onto mechanochemistry treated zeolite: Modeling and site energy distribution analysis

2019 ◽  
Vol 222 ◽  
pp. 30-34 ◽  
Author(s):  
Zhen Chen ◽  
Wei Ma ◽  
Guang Lu ◽  
Fanqing Meng ◽  
Shibo Duan ◽  
...  
Keyword(s):  
Energy Distribution ◽  
Distribution Analysis ◽  
Site Energy
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