Optical dispersion

Constantine S, Zhou Y, Morals J and Ziegler L D 1997 Dispersed optical heterodyne birefringence and dichroism of transparent liquids J. Phys. Chem. A 101 5456-62... 

Wlrile tire Bms fonnula can be used to locate tire spectral position of tire excitonic state, tliere is no equivalent a priori description of the spectral widtli of tliis state. These bandwidtlis have been attributed to a combination of effects, including inlromogeneous broadening arising from size dispersion, optical dephasing from exciton-surface and exciton-phonon scattering, and fast lifetimes resulting from surface localization 1167, 168, 170, 1711. Due to tire complex nature of tliese line shapes, tliere have been few quantitative calculations of absorjDtion spectra. This situation is in contrast witli tliat of metal nanoparticles, where a more quantitative level of prediction is possible. 

Fontaine, A., Dartyge, E., Itie, J. P., Jucha, A., Polian, A., Tolentino, H. and Tourillon, G. Time-Resolved X-Ray Absorption Spectroscopy Using an Energy Dispersive Optics Strengths and Limitations. 151, 179-203 (1989). 

A number of newly introduced abbreviations describes the special techniques used which depend also on the IR instrumentation (conventional dispersive optics or Fourier transform devices). 

A great deal of success was attendant on the early application of PM-IRRAS to the gas/solid interface. Golden et ai (1981) reported the development of instrumentation, using conventional dispersive optics, able to record detailed infrared reflection-absorption spectra from molecules adsorbed on single-crystal Pt without any interference from the gas-phase species. 

E.A. Romanova, L.A. Melnikov, Spatiotemporal dynamics of femtosecond pulses in non-linear optical waveguides with material dispersion , Optics and Spectroscopy 96, 90-95 (2004). 

The discussion in the present section concerns only dispersive optical spectroscopy. We shall not treat the resolution characteristic of a Fourier interferometric spectrometer, which is determined by the optical path difference scanned and the apodizing function used. Nevertheless, these... 

Sometimes the spectrometer completely obliterates the information at all Fourier frequencies co beyond some finite cutoff Q. This is specifically true of dispersive optical spectrometers, where the aperture determines 1. The cutoff Q may be extended to high Fourier frequencies by multipassing the dispersive element or employing the high orders from a diffraction grating. 

For all these reasons diffraction gratings are used in most dispersive optical instruments. It is however essential to bear in mind the artefacts that can arise from harmonic transmissions. 

HOSTALUX EBS-AL is a disperse optical brightener which has been specially formulated for continuous (thermosol) applications on polyester fibers and its blends. 

Optical Rotatory Dispersion Optical rotatory dispersion (ORD) is the... 

A viable alternative is using the so-called Fundamental Parameters Approach to synthesize the IP (Chapters 5 and 6). In fact, the IP is itself given by a convolution of profiles, chiefly those produced by wavelength dispersion, optical components and absorption. If the geometry of the PD instrument is known and sufficiently accurate, the FPA can provide a calculated IP without the need for using powder standards. 

Small fluorescent spots on a white polyester/cotton fabric were extracted and compared with extracts from samples without spots. With the aid of TLC and IRS the spots were shown to be a mixture of silicone and a disperse optical brightener. 

Time-Resolved X-Ray Absorption Spectroscopy Using an Energy Dispersive Optics ... 

But we would like to apologize for the incompleteness of this report which is not an extensive review, but rather a selection of typical experiments carried out in our laboratory using the dispersive scheme. In particular, we do not report the important experiments, including stopped-flow measurements developed by the Japanese scientists (lead by T. MATSUSHITA) who have been the very first to combine synchrotron radiation and dispersive optics to perform X-ray absorption spectroscopy. The readers interested can easily overcome this deficiency by looking through the proceedings of the three last EXAFS conferences held at Stanford (1984) Fontevraud (1986), and Seattle (1988) as mentioned in the reference list. 

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