2014 We consider the problem of resonance fluorescence from N two-level atoms interacting with an intense cavity mode. The novel results for the spectral and statistical properties of the fluorescence field, which are quite different from collective resonance fluorescence in a free space, are obtained. The correlation, anti-correlation between spectrum components and violation of the Cauchy-Sch...

A perylene and a terrylene tetracarboxylic bisimide dyad was prepared in which an efficient energy transfer from the former to the latter is observed. The absorption spectrum of this compound covers a broad range. Bathochromic fluorescence with a high quantum yield was obtained independent of excitation wavelengths (λ < 655 nm). The dyad can be recommended for the use of calibrating fluorescenc...

We demonstrate the measurement of two-photon excitation (TPE) spectra, used not only for fluorescence but also for photoconversion in green-to-red photoconvertible Kaede, using nonlinear Fourier-transform spectroscopy. It was found that in unphotoconverted Kaede, the TPE spectrum for photoconversion is much different to that for green-fluorescence. This is similar to the difference between the ...

Dielectric relaxation (DR) of acrylodan-labeled human serum albumin (HSA/AC) was studied by phase-fluorometry. A non-monoexponential behavior of both the total fluorescence--and the DR decays has been found. The protein environment of the fluorescent marker shows DR times ranging from the pico to nanosecond timescale. In fluorescence emission decays measured on the red side of the fluorescence ...

Fluorescence Emission Spectrum, Chlorella, Energy Uptake Algae, when slowly cooled down to around -5 °C, undergo a change in the fluorescence emissi­ on spectrum subsequently taken at liqu. nitrogen temperature. This change resembles the mag­ nesium effect described by Murata [BBA 189,171 — 181, (1969)] for isolated chloroplasts. Evidence is shown, that both effects are indeed analogous. Coolin...

The fluorescence of housefly photoreceptors was studied in viuo by using the deep pseudopupil technique. Whereas the rhodopsin R490 of the peripheral retinular cells fluoresces negligibly the metarhodopsin M580 fluoresces distinctly in the red. The newly discovered metarhodopsin M’ is produced by intense blue light and can be reconverted into rhodopsin by intense long wavelength light. M’ also ...

The fluorescence of housefly photoreceptors was studied in viuo by using the deep pseudopupil technique. Whereas the rhodopsin R490 of the peripheral retinular cells fluoresces negligibly the metarhodopsin M580 fluoresces distinctly in the red. The newly discovered metarhodopsin M’ is produced by intense blue light and can be reconverted into rhodopsin by intense long wavelength light. M’ also ...

We present a rapid-scanning approach to fluorescence-detected two-dimensional electronic spectroscopy that combines acousto-optic phase-modulation with digital lock-in detection. The shifts the signal detection window suppress 1/f laser noise and enables interferometric tracking of time delays allow for correction spectral phase distortions accurate phasing data. This use acquisition linear non...

A dramatic electric field dependence has been observed in the fluorescence yield spectrum of the doubly excited states in helium, where a rich phenomenology is encountered below the threshold. Fluorescence yields of certain states can be tuned to zero, while other dipole-forbidden states are significantly enhanced, for fields much weaker than 1 kV/cm. Using an R-matrix multichannel quantum defe...

Morphological resonances are detected in elastic scattering and fluorescence excitation spectra from a cluster of two spheres, each -5 /im in radius, isolated and oriented in an electrodynamic levitator trap. Light scattering at 90' and perpendicular to the line of centers of the particles, by broadside illumination with polarization in the scattering plane, shows that an independent particle m...