Multispectral imaging or imaging spectroscopy obtains spectral content of an object by dividing the image data, pixel by pixel, into wavelength (color) bands. The resulting 3D data cube (x, y, λ) allows materials to be identified by their pixel spectral content at multiple wavelengths in addition to their spatial characteristics. A new class of multispectral imaging systems are being developed ...

One-and two-color time-domain probing of the resonant dichroic response of iodine in n-hexane following femtosecond B-X excitation at 580 nm is described. The detected signals contain both ground and excited state vibrational coherence contributions to the third-order polarization. The dichroic response can be separated into positive and negative amplitude contributions: B-X absorption and stim...

Five anthraquinone dyes with bis(4-propylphenyl) substituents, connected via sulfide or amine linking groups at the 1,5-positions or directly at the 2,6-positions, have been studied as guests in the nematic liquid crystal host, E7. Polarized UV-visible absorption spectra of aligned samples were used to obtain experimental dichroic order parameters, which exhibit values in the range 0.51-0.74. F...

Significant efficiency increases in photovoltaic power conversion are due to improved absorption over the broad spectrum of the sun. Semiconductors have an efficiency peak at a specific wavelength associated with the material band gap. The current trend towards high-efficiency photovoltaics involves multi-junction cells where several semiconductors are grown on top of one another creating a lay...

Both the intrinsic anisotropic optical materials and fullerene-assembled 2D have attracted much interest in fundamental science potential applications. The synthesis of a monolayer (ML) fullerene makes combination these two features plausible. In this work, using first-principles calculations, we systematically study electronic structure properties quasi-hexagonal phase (qHP) ML quasi-tetragona...

Circular dichroism in the 300-360 nm region and fluorescence induced by intercaltating binding of ethidum bromide to both DNA and RNA components were studied in isolated HeLa nucleoli. Both DNA and RNA compoents contribute to the induced dichroic elliticity. Digestion of nucleoli by RNase or DNase shows that most of the induced ellipticity comes from the DNA component. In nucleoli with an RNA/D...

A_ de~ail~d ex~erimental and theoretical study of dichroic effects in photoelectron angular d1stnbut10ns IS reported for ( 1 + 1), two-color REMPI of NO via the A 2L +, v = 0 state. ?ptically aligned A state rotational levels are probed through ionization by circularly polarized hght. Resultant photoelectron angular distributions exhibit significant left-right asymmetry, the phase and magnitude...