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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 infrared emission spectrum of SH has been observed in the 1850-2800 cm −1 spectral region using a Fourier transform spectrometer and the molecules were excited in a microwave discharge source and the spectra have been recorded at a resolution of 0.005 cm − 1.
41 citations
TL;DR: In this paper, high resolution spectra of neutral silver have been recorded by Fourier Transform Spectrometry in the region 2 000-8 280 A(50 000-12 000 cm-1) with silver-neon and silver-argon hollow cathode lamps as sources.
Abstract: High resolution spectra of neutral silver have been recorded by Fourier Transform Spectrometry in the region 2 000-8 280 A(50 000-12 000 cm-1) with silver-neon and silver-argon hollow cathode lamps as sources. This work represents order-of-magnitude improvements, compared to previous work on Ag I, in accuracy of transition wavelengths and wavenumbers, and energy level values. 35 classified Ag I transitions are given, and the wavenumber uncertainty for the strongest lines is less than 0.002 cm-1. Improved values for 28 energy levels are presented.
41 citations
20 Oct 2016
TL;DR: In this article, an ultrastable common-path interferometer was proposed for high-intensity laser pulses that drive the table-top high-harmonic generation (HHG) process, which enables the generation of fully coherent XUV pulse pairs with sub-attosecond timing variation, tunable time delay, and a clean Gaussian spatial mode profile.
Abstract: Coherent extreme ultraviolet (XUV) radiation produced by table-top high-harmonic generation (HHG) sources provides a wealth of possibilities in research areas ranging from attosecond physics to high-resolution coherent diffractive imaging. However, it remains challenging to fully exploit the coherence of such sources for interferometry and Fourier transform spectroscopy (FTS). This is due to the need for a measurement system that is stable at the level of a wavelength fraction, yet allows controlled scanning of time delays. Here, we demonstrate XUV interferometry and FTS in the 17–55 nm wavelength range using an ultrastable common-path interferometer suitable for high-intensity laser pulses that drive the HHG process. This approach enables the generation of fully coherent XUV pulse pairs with sub-attosecond timing variation, tunable time delay, and a clean Gaussian spatial mode profile. We demonstrate the capabilities of our XUV interferometer by performing spatially resolved FTS on a thin film composed of titanium and silicon nitride.
41 citations
TL;DR: In this article, the authors present a comprehensive mathematical survey for parameter extraction using phase sensitive measurement techniques, such as THz time-domain spectroscopy or dispersive Fourier transform Spectroscopy.
Abstract: Phase sensitive measurement techniques, such as THz time-domain spectroscopy or dispersive Fourier transform spectroscopy, are very useful tools to obtain a complete set of optical material parameters When recording the electric field as a function of time delay between THz and optical pulse, the absorption coefficient and the index of refraction can be extracted However, the analysis shows ambiguity Here, we describe an analysis which yields a complete set of mathematical solutions and show how the physically relevant can be deduced We present a comprehensive mathematical survey for parameter extraction We have recorded the THz spectra of anthracene and the fatty acid capric acid as examples for weakly absorbing solid samples, and an ionic liquid as an example for a strongly absorbing liquid sample Finally, we discuss the uncertainty of the obtained optical parameters using error propagation of the Fourier transformation with a simple model and a rigorous mathematical procedure
41 citations
TL;DR: The analysis of the pyridineFTIR spectra illustrates the potential of the new generation of FTIR spectrometers in the study of spectra and rovibrational dynamics of aromatic systems and molecules of potential biological interest.
Abstract: The analysis of selected rovibrationally resolved infrared spectra of some relatively heavy and large polyatomic molecules is reviewed. A short historical summary of the development of high resolution interferometric Fourier transform infrared (FTIR) spectrometers is given and the possibilities of the currently most highly resolving FTIR spectrometer, which is commercially available in the Bruker IFS 125 series, are discussed. The computational tools necessary to analyse FTIR spectra are described briefly. As examples of rovibrational analysis the spectra of three selected molecules CHCl(2)F, CDBrClF, and pyridine (C(5)H(5)N) are discussed. The spectrum of CHCl(2)F, a fluorochlorohydrocarbon, is of interest for a better understanding of the chemistry of the Earth's atmosphere. CDBrClF is a chiral molecule and therefore the analysis of its rovibrational spectra provides the basis for carrying out further experiments towards the detection of molecular parity violation. The analysis of the pyridine FTIR spectra illustrates the potential of the new generation of FTIR spectrometers in the study of spectra and rovibrational dynamics of aromatic systems and molecules of potential biological interest.
41 citations