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Line-Shape Measurements by Tunable Diode Laser 用可调谐二极管激光器测量线形
Modern Spectroscopy of Solids, Liquids, and Gases Pub Date : 1900-01-01 DOI: 10.1364/msslg.1995.sthb9
A. Nadezhdinskii
{"title":"Line-Shape Measurements by Tunable Diode Laser","authors":"A. Nadezhdinskii","doi":"10.1364/msslg.1995.sthb9","DOIUrl":"https://doi.org/10.1364/msslg.1995.sthb9","url":null,"abstract":"Precision limitations of Tunable Diode Laser Spectroscopy (TDLS) are analyzed in relation to precise line-shape measurements such as baseline, optical zero, nonlinearity, laser noise, etc.) to affect experimental accuracy. Analytical expressions were derived for different error sources. An experimental procedure and data processing algorithm is proposed to minimize the error of line-shape parameters determination. It was shown that relative intensity measurements can be accurate within 0.3%.","PeriodicalId":266792,"journal":{"name":"Modern Spectroscopy of Solids, Liquids, and Gases","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114661208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tomographic Analysis of Diode Laser Absorbance Spectra 二极管激光吸收光谱的层析分析
Modern Spectroscopy of Solids, Liquids, and Gases Pub Date : 1900-01-01 DOI: 10.1364/msslg.1995.ssaa6
K. McNesby, R. G. Daniel, J. B. Morris, A. Miziolek
{"title":"Tomographic Analysis of Diode Laser Absorbance Spectra","authors":"K. McNesby, R. G. Daniel, J. B. Morris, A. Miziolek","doi":"10.1364/msslg.1995.ssaa6","DOIUrl":"https://doi.org/10.1364/msslg.1995.ssaa6","url":null,"abstract":"Absorbances measured using line-of-sight techniques inherently report spectral attenuation integrated along the entire beam path1. At a given frequency, line-of-sight absorbance through a low pressure combusting system may have contributions from gases at several different densities and temperatures corresponding to the light beam passing through different regions in the low pressure containment chamber. The degree to which the line-of-sight path is nonhomogeneous is determined by diffusion and flow dynamics within the low pressure containment chamber. Usually, the region of interest is the flame region where the density of some combustion gases may be less than in cooler portions of the line-of-sight path.","PeriodicalId":266792,"journal":{"name":"Modern Spectroscopy of Solids, Liquids, and Gases","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129516914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Time-of-Flight and Internal State Distributions of Photodesorbed Species from N2O Adsorbed on Pt(111) by 193 nm light. 193nm光下Pt(111)吸附N2O光解吸物质的飞行时间和内态分布
Modern Spectroscopy of Solids, Liquids, and Gases Pub Date : 1900-01-01 DOI: 10.1364/msslg.1995.sfa4
D. Masson, E. Lanzendorf, A. Kummel
{"title":"Time-of-Flight and Internal State Distributions of Photodesorbed Species from N2O Adsorbed on Pt(111) by 193 nm light.","authors":"D. Masson, E. Lanzendorf, A. Kummel","doi":"10.1364/msslg.1995.sfa4","DOIUrl":"https://doi.org/10.1364/msslg.1995.sfa4","url":null,"abstract":"Polarized ultraviolet light from an excimer laser (193 nm) was used to photodesorb and photodissociate N2O adsorbed on a cold Pt(111) surface. The desorbed species and their time-of-flight (TOF) were monitored by resonantly enhanced Multi Photon Ionization (MPI) spectroscopy of N2 and atomic oxygen. We have identified three major channels: thermal desorption of molecular N2, photodesorption of ground electronic state N2O, and ejection of ballistic oxygen atoms.","PeriodicalId":266792,"journal":{"name":"Modern Spectroscopy of Solids, Liquids, and Gases","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124009823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Imaging Nanostructures with Near-Field Microscopy 用近场显微镜成像纳米结构
Modern Spectroscopy of Solids, Liquids, and Gases Pub Date : 1900-01-01 DOI: 10.1364/msslg.1995.ssaa1
D. Tsai, J. Kovacs, A. Othonos, C. Douketis, Peng Zhang, Martin Moskovitis
{"title":"Imaging Nanostructures with Near-Field Microscopy","authors":"D. Tsai, J. Kovacs, A. Othonos, C. Douketis, Peng Zhang, Martin Moskovitis","doi":"10.1364/msslg.1995.ssaa1","DOIUrl":"https://doi.org/10.1364/msslg.1995.ssaa1","url":null,"abstract":"Near-field microscopy used in the apertured \"photon scanning tunneling\" mode was used to image a range on nanostructured systems including heterogeneous polymers, fiber Bragg gratings and colloid particle fractal assemblies.","PeriodicalId":266792,"journal":{"name":"Modern Spectroscopy of Solids, Liquids, and Gases","volume":"31 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120840014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Femtosecond nonlinear optical studies of molecular and structural dynamics in condensed phases 凝聚态分子和结构动力学的飞秒非线性光学研究
Modern Spectroscopy of Solids, Liquids, and Gases Pub Date : 1900-01-01 DOI: 10.1364/msslg.1995.sthb4
W. Lotshaw, P. R. Staver
{"title":"Femtosecond nonlinear optical studies of molecular and structural dynamics in condensed phases","authors":"W. Lotshaw, P. R. Staver","doi":"10.1364/msslg.1995.sthb4","DOIUrl":"https://doi.org/10.1364/msslg.1995.sthb4","url":null,"abstract":"The information content of femtosecond time-resolved nonlinear optical transients can be fully exploited by combining conventional kinetic analyses of the transient waveforms with a spectral analysis of the discreet Fourier transform (FFT) of the same. Qualitative and quantitative constraints on the sample systems and time-resolved data format must be observed to generate rigorously defensible and verifiable data interpretations.","PeriodicalId":266792,"journal":{"name":"Modern Spectroscopy of Solids, Liquids, and Gases","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125321953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Resonance Raman studies of I 3 – photodissociation in solution 溶液中i3 -光解的共振拉曼研究
Modern Spectroscopy of Solids, Liquids, and Gases Pub Date : 1900-01-01 DOI: 10.1364/msslg.1995.sfb4
Alan E. Johnson, A. Myers, S. Ruhman, U. Banin
{"title":"Resonance Raman studies of I 3 – photodissociation in solution","authors":"Alan E. Johnson, A. Myers, S. Ruhman, U. Banin","doi":"10.1364/msslg.1995.sfb4","DOIUrl":"https://doi.org/10.1364/msslg.1995.sfb4","url":null,"abstract":"The triiodide ion in solution has two strong, featureless electronic transitions spanning the blue to mid-uv spectral region which dissociate to \u0000 \u0000 \u0000 \u0000 I\u0000 \u0000 \u0000 2\u0000 –\u0000 \u0000 \u0000 \u0000 \u0000 \u0000 - and atomic iodine. Recent femtosecond pump-probe experiments have shown that the diiodide ion product is formed vibrating coherently. [1] Numerical simulations of the photodissociation event, both in the isolated molecule[2] and with solvent explicitly present, [3] are in qualitative agreement with the data, but rely on an empirical LEPS potential surface parameterized to reproduce the structureless absorption bands only. In order to explore the photodissociative potential surface more precisely, we have measured resonance Raman spectra, including absolute scattering cross sections, for \u0000 \u0000 \u0000 \u0000 I\u0000 \u0000 \u0000 3\u0000 –\u0000 \u0000 \u0000 \u0000 \u0000 \u0000 in ethanol, ethyl acetate, and acetonitrile at excitation wavelengths from 266 to 416 nm, as well as in the preresonant region at 488 nm.","PeriodicalId":266792,"journal":{"name":"Modern Spectroscopy of Solids, Liquids, and Gases","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129590151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Zeke Photoelectron Spectroscopy as a Probe of Dissociative States 齐克光电子能谱作为解离态的探针
Modern Spectroscopy of Solids, Liquids, and Gases Pub Date : 1900-01-01 DOI: 10.1364/msslg.1995.sfa1
Andreas Strobel, I. Fischer, K. Müller-Dethlefs, V. Bondybey
{"title":"Zeke Photoelectron Spectroscopy as a Probe of Dissociative States","authors":"Andreas Strobel, I. Fischer, K. Müller-Dethlefs, V. Bondybey","doi":"10.1364/msslg.1995.sfa1","DOIUrl":"https://doi.org/10.1364/msslg.1995.sfa1","url":null,"abstract":"During the past decade zero kinetic energy photoelectron spectroscopy (ZEKE-PES)1 has become one of the most important techniques for gas-phase studies of molecular ions and ionic complexes. Compared to conventional photoelectron techniques a resolution enhancement by 2 to 3 orders has been achieved and even the rotational structure of larger polyatomic ions can be resolved.2","PeriodicalId":266792,"journal":{"name":"Modern Spectroscopy of Solids, Liquids, and Gases","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126394333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Infrared Spectroscopy using Difference Frequency Generation in AgGaS2: Propargyl Radical 差频产生AgGaS2:丙炔自由基的红外光谱分析
Modern Spectroscopy of Solids, Liquids, and Gases Pub Date : 1900-01-01 DOI: 10.1364/msslg.1995.ssaa2
W. C. Eckhoff, L. Yuan, C. Billera, R. Curl, C. Miller
{"title":"Infrared Spectroscopy using Difference Frequency Generation in AgGaS2: Propargyl Radical","authors":"W. C. Eckhoff, L. Yuan, C. Billera, R. Curl, C. Miller","doi":"10.1364/msslg.1995.ssaa2","DOIUrl":"https://doi.org/10.1364/msslg.1995.ssaa2","url":null,"abstract":"The propargyl radical (HCCCH2) is of interest as a possible precursor in benzene and soot formation in flames and as one of the simplest conjugated organic free radicals. Because of its importance, several spectroscopic investigations of this species have recently been carried out.1-4 In order to learn more about its structure and potential surface, we have begun an investigation of the high resolution infrared spectra of the partially deuterated form, DCCCH2 in the region of the CD stretching fundamental. In this work an infrared kinetic spectroscopy apparatus5 based on difference frequency generation in the nonlinear material AgGaS2 was employed.","PeriodicalId":266792,"journal":{"name":"Modern Spectroscopy of Solids, Liquids, and Gases","volume":"333 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114128847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Coincident product distributions and vector correlations in the 193 nm photodissociation of NCCN NCCN在193nm光解过程中的重合积分布和矢量相关性
Modern Spectroscopy of Solids, Liquids, and Gases Pub Date : 1900-01-01 DOI: 10.1364/msslg.1995.sfa3
Ming T. Wu, G. Hall
{"title":"Coincident product distributions and vector correlations in the 193 nm photodissociation of NCCN","authors":"Ming T. Wu, G. Hall","doi":"10.1364/msslg.1995.sfa3","DOIUrl":"https://doi.org/10.1364/msslg.1995.sfa3","url":null,"abstract":"The theory of unimolecular decomposition has played a central role in the history of chemical kinetics and molecular dynamics. Energy-dependent rate constants, product final state distributions, and photofragment excitation spectra have provided experimental tests for simple and complex unimolecular theories. The use of Doppler spectroscopy to measure correlated velocity and angular momentum distributions can frequently provide a more complete picture of the dissociation process than other, more integrated measurements. The 193 nm dissociation of cyanogen (NCCN) has been considered a classic case of a barrierless dissociation, well described by simple phase space theory, where all asymptotic product states that conserve total energy and angular momentum are considered equally likely.","PeriodicalId":266792,"journal":{"name":"Modern Spectroscopy of Solids, Liquids, and Gases","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131556112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microcavities for Ultrasensitive Spectroscopy 超灵敏光谱学的微腔
Modern Spectroscopy of Solids, Liquids, and Gases Pub Date : 1900-01-01 DOI: 10.1364/msslg.1995.sthb11
B. L. Olmsted, Michieal L. Jones
{"title":"Microcavities for Ultrasensitive Spectroscopy","authors":"B. L. Olmsted, Michieal L. Jones","doi":"10.1364/msslg.1995.sthb11","DOIUrl":"https://doi.org/10.1364/msslg.1995.sthb11","url":null,"abstract":"Spectroscopy is often performed on emission or absorption centers that due to sample preparation are located within a thin film or located in proximity to a dielectric interface. However, locating emission or absorption centers near reflecting interfaces can strongly effect their interaction with the electromagnetic field. In recent years, there have been several reports of the observation of a change in the angular distribution of emission due to cavity confinement. In addition, changes in the radiative lifetime have also been reported. A review of spontaneous emission from planar microstructures has recently been presented by Deppe et. al.1 The perturbation of the radiative properties of centers can be predicted using quantum electrodynamics for the electromagnetic modes of the discontinuous media. In fact, it is possible to design a specific structure to enhance the mode amplitude, and therefore, the interaction at the position of a radiative center. This approach can be used for ultrasensitive spectroscopy. Furthermore, emission or excitation angle can be used to selectivity cause enhancement at a particular frequency or position within a planar structure.","PeriodicalId":266792,"journal":{"name":"Modern Spectroscopy of Solids, Liquids, and Gases","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134609658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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