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Previous experimental studies have allowed us to observe peculiar localization effects of excitons in GaN/AlGaN quantum wells grown by MBE, as well as efficient nonradiative inter-well carrier transfers. In this work, we use the envelope-function approxima ...
We have used an optical-infrared double resonance technique to probe the nature of the eigenstates prepared by 4-nu-OH vibrational overtone excitation in hydrogen peroxide. A visible dye laser excites the 4
Time-integrated fluorescence expts. on native bacteriorhodopsin and on its non-isomerizing form bR5.12 are reported. The exptl. set-up was designed such as to observe emission exclusively from the excited state intermediate I-460. We obtain the first syste ...
Emission, absorption, and excitation spectroscopy was used for a detailed anal. of the optical transitions of Hg2 trapped in cryogenic matrixes. Upon excitation of electronic states correlating to the 3P1 or the 1P1 asymptote, fast nonradiative relaxation ...
The cage-induced stabilization of fragments in excited electronic states following the UV-dissocn. of ICN in cryogenic matrixes is discussed. Emission spectra recorded upon ~A-band excitation of ICN in solid Ne, Ar and Kr exhibit a long progression of broa ...
The fluorescence-excitation and fluorescence spectra as well as the fluorescence decay times were recorded for Hg atoms excited to the 61P1 state by synchrotron radiation in Ar, Kr, Xe, N2, and CH4 matrixes and in Ar matrixes with a low NH3 content. Sequen ...
Transitions from the X 1SIGMA+ (v = 0) ground state of the carbon monoxide molecule to the electronically excited A 1PI(v = 0), B 1SIGMA+ (v = 0), and C 1SIGMA+ (v = 0) states have been studied by 2-photon laser induced fluorescence spectroscopy. Accurate ...
We report rotationally resolved spectra of jet-cooled methanol for the OH stretch overtones, 2v(1) and 3v(1), and for the torsional combinations, 2v(1)+v(12), 2v(1)+2v(12), 3v(1)+v(12), and 3v(1)+2v(12). The spectra are obtained by direct excitation from t ...
We report on Raman scattering in hexagonal GaN quantum wells embedded in Al0.11Ga0.89N barriers, The six monolayers thick quantum wells, grown by molecular beam epitaxy, are deposited on a GaN buffer layer. Resonant enhancement of the Raman lines associate ...
Time-resolved fluorescence spectra for C60 mols. embedded in Ne and Ar matrixes and C70 in Ne matrixes were recorded using a synchroscan streak camera. In the case of C60, the decay times of the S1 state are identical for all fluorescence bands confirming ...
