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Fourier transform spectroscopy
About: Fourier transform spectroscopy is a research topic. Over the lifetime, 5418 publications have been published within this topic receiving 134133 citations.
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TL;DR: In this paper, the use of 2D Fourier transform (2DFT) spectroscopy to study exciton dynamics in semiconductor nanostructures has been discussed.
Abstract: Optical two-dimensional Fourier transform (2DFT) spectroscopy has been developed over the last decade as a powerful tool for studying a variety of physical systems, ranging from atoms to molecules to solids. This review covers our use of 2DFT spectroscopy to study exciton dynamics in semiconductor nanostructures. In quantum wells, 2DFT spectroscopy confirms the importance of many-body contributions to the coherent optical response and reveals nonradiative double-quantum and Raman coherences. For natural quantum dots, 2DFT spectroscopy enables ensemble measurements of the homogeneous linewidth, including the temperature and density dependence. Relaxation from quantum well states into the quantum dots can also be studied using 2DFT spectroscopy.
56 citations
55 citations
TL;DR: Femtosecond two-dimensional Fourier transform spectroscopy generates and probes several types of coherence that characterize the couplings between vibrational and electronic motions, and 2D oscillation maps are beginning to isolate the medium lifetime vibronic coherences that report on subsequent stages of the excited-state dynamics.
Abstract: Femtosecond two-dimensional (2D) Fourier transform spectroscopy generates and probes several types of coherence that characterize the couplings between vibrational and electronic motions. These cou...
55 citations
TL;DR: In this article, a pulsed-nozzle Fourier transform microwave spectrometer was used to observe the pure rotational spectra of open-shell van der Waals complexes, ArOH and ArOD, for the first time.
Abstract: Pure rotational spectra of open‐shell van der Waals complexes, ArOH and ArOD, have been observed for the first time by a pulsed‐nozzle Fourier‐transform microwave spectrometer. The complexes were produced in a pulsed electronic discharge in a water/Ar mixture, with subsequent expansion of the discharge products into a supersonic jet. The observed J =5/2–3/2 transitions for both the species showed P‐type doublings, as well as magnetic hyperfine splittings due to the proton or deuterium nuclear spin. The hyperfine coupling constants of the complexes are much smaller than those of free OH or OD, showing that the complex is undergoing a large amplitude motion in the ground vibronic state with an average amplitude exceeding 50°.
55 citations
01 Jan 1982
TL;DR: In this article, the Fourier Transform Nuclear Quadrupole Resonance (FT-NQR) spectroscopy is used to detect pure quadrupole coupling transitions in solids.
Abstract: FT-NQR (Fourier Transform Nuclear Quadrupole Resonance) spectroscopy is one of the newer analytical tools. Although nuclear quadrupole coupling constants were first observed in atoms by Schmidt and Schuler1 in 1935 and in molecules by Kellog2 and coworkers in 1936, it was the discovery of pure quadrupole coupling transitions in solids by Dehmelt and Kruger3,4 in 1950 and 1951 that initiated the understanding of the NQR phenomenon as presently utilized.
55 citations