scispace - formally typeset
Search or ask a question
Topic

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.


Papers
More filters
Journal ArticleDOI
TL;DR: F fourier transform spectroscopy is used which is capable of giving more precise values for the relative vibrational populations at low intensities, by recording emission down to lower background pressures (1 x 10(-4) Torr), and by treating the vessel walls so as to remove OHdagger more effectively.
Abstract: Vibrationally excited hydroxyl formation by atomic hydrogen reaction with ozone, using Fourier transform spectroscopy

129 citations

Journal ArticleDOI
TL;DR: In this article, Fourier transform spectroscopy was used to measure the absolute absorption cross sections for formaldehyde (CH{sub 2}O) as a function of temperature (223-293 K) and formaldehyde concentration in nitrogen at 500 Torr.
Abstract: The near-ultraviolet (300-360 nm, 33,300-27,800 cm{sup {minus}1}) absolute absorption cross sections for formaldehyde (CH{sub 2}O) have been measured as a function of temperature (223-293 K), and formaldehyde concentration in nitrogen at 500 Torr. Fourier transform spectroscopy was performed using an instrumental resolution sufficiently high (1.00 cm{sup {minus}1} or approximately 0.011 nm at 330 nm) to ensure the cross sections which are used in calculated atmospheric photolysis rates are free of artifacts due to overlap (or lack thereof) in the spectral structure of the solar flux or in the structure of the formaldehyde absorption spectrum. Comparisons with previous measurements are made and recommendations presented for use in atmospheric photolysis rate calculations.

128 citations

Journal ArticleDOI
01 Jan 1985
TL;DR: In this paper, the authors compared the Mach-Zehnder-IMPATT spectrometer with the openresonator and compared the open-resonators with a polarizing interferometer, showing that the dielectric loss increases with frequency in the millimeter.
Abstract: It is no longer necessary to use extrapolated microwave dielectric values when designing millimeter-wave components and systems. Very recently, highly accurate millimeter-wave (5- to 1/2-mm) data on complex dielectric permittivity and loss tangent have become available to engineers for a variety of materials such as common ceramics, semiconductors, crystalline, and glass materials. One quasi-optical measurement method has proved to be most accurate and reproducible, namely, dispersive Fourier transform spectroscopy (DFTS) applied to a polarizing interferometer. The openresonator method and the Mach-Zehnder-IMPATT spectrometer will also be described and compared. The fact that the dielectric loss increases with frequency in the millimeter, unlike the microwave, is an important feature of these data. Reliable measurements also reveal that the methods of preparation of nominally identical specimens can change the dielectric losses by a factor of three.

128 citations

Journal ArticleDOI
TL;DR: A Fourier transform spectrometer with no mechanical moving parts is described, which may be built in a relatively small size and with moderate cost and may lead to the application to time-resolved spectroscopy.
Abstract: A Fourier transform spectrometer with no mechanical moving parts is described. The interferogram is generated spatially by a triangle common-path interferometer and is detected by a self-scanning photodiode array. The spectrum is reconstructed by fast Fourier transform in a microcomputer system. Since no moving part is used and a common-path interferometer is employed for simple, stable, and easy alignment, this spectrometer may be built in a relatively small size and with moderate cost. The self-scanning photodiode array as a multichannel detector may lead this spectrometer to the application to time-resolved spectroscopy. The optical throughput is much larger than that of a multichannel dispersion-type spectrometer, because in the system neither a slit nor an aperture is necessary. The emission spectra of a low pressure mercury lamp and a LED are shown to demonstrate the system performance.

127 citations

Book
08 Feb 2001
TL;DR: In this article, the authors define general properties of Fourier Transformer Transformer Transform, Discrete Fourier Transform, Fast Fourier transform, Laplace Transform, and Other Integral Transformer transform.
Abstract: I MATHEMATICAL FUNDAMENTALS: Basic Definitions General Properties of Fourier Transforms Discrete Fourier Transforms Fast Fourier Transforms Laplace and Other Integral Transforms II SPECTRAL APPLICATIONS: Fourier Transform Spectroscopy Fourier Transform Nuclear Magnetic Resonance (NMR) Spectrometry FT Ion Cyclotron Resonance Mass Spectrometry Diffraction and Fourier Transform Uncertainty Principle Signal Processing Fourier Self-Deconvolution Linear Prediction.

126 citations


Network Information
Related Topics (5)
Raman spectroscopy
122.6K papers, 2.8M citations
90% related
Excited state
102.2K papers, 2.2M citations
84% related
Dielectric
169.7K papers, 2.7M citations
81% related
Silicon
196K papers, 3M citations
80% related
Amorphous solid
117K papers, 2.2M citations
80% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202334
2022117
202171
202076
2019108
201888