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Photoacoustic Spectroscopy of Metals and Metglasses+) 金属与玻璃的光声光谱
Second International Meeting on Photoacoustic Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/pas.1981.tub13
K. Heihoff, J. Pelzl, N. Croitoru, P. Cornaz
{"title":"Photoacoustic Spectroscopy of Metals and Metglasses+)","authors":"K. Heihoff, J. Pelzl, N. Croitoru, P. Cornaz","doi":"10.1364/pas.1981.tub13","DOIUrl":"https://doi.org/10.1364/pas.1981.tub13","url":null,"abstract":"Metallic compounds are optically opaque in the infrared and visible wavelength region. Due to their high reflectivity R, only a small part (1-R) of the incident light intensity Io is absorbed in the material. With regard to the optical detection, the experimental conditions are very similar to those of transparent materials, where PAS has become a promising technique. The present work is concerned with PA studies of the optical reflectivity of amorphous metallic compounds. Here we report on first results obtained at 10K and at room temperature from some metglasses and noble metals; the latter have been used as reference materials.","PeriodicalId":202661,"journal":{"name":"Second International Meeting on Photoacoustic Spectroscopy","volume":"28 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":"134224415","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
Electron-Acoustic Microscopy: Questions and Prospects 电子声显微镜:问题与展望
Second International Meeting on Photoacoustic Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/pas.1981.tha4
G. Cargill
{"title":"Electron-Acoustic Microscopy: Questions and Prospects","authors":"G. Cargill","doi":"10.1364/pas.1981.tha4","DOIUrl":"https://doi.org/10.1364/pas.1981.tha4","url":null,"abstract":"The first electron-acoustic micrographs were published less than a year ago.1,2 This paper points out several important technical questions about this new technique and discusses a few of its possible applications.","PeriodicalId":202661,"journal":{"name":"Second International Meeting on Photoacoustic Spectroscopy","volume":"14 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":"125609714","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
Nonlinear Photoacoustic Spectroscopy 非线性光声光谱学
Second International Meeting on Photoacoustic Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/pas.1981.wa6
E. V. Van Stryland, M. Woodall, M. Soileau, W. Williams
{"title":"Nonlinear Photoacoustic Spectroscopy","authors":"E. V. Van Stryland, M. Woodall, M. Soileau, W. Williams","doi":"10.1364/pas.1981.wa6","DOIUrl":"https://doi.org/10.1364/pas.1981.wa6","url":null,"abstract":"The capabilities of the photoacoustic technique to measure small absorptivities is now well documented. This capability is now being exploited to measure nonlinear absorption in a variety of materials. The potentials of this new non-linear spectroscopic techniques are just beginning to be realized. Preliminary experiments have shown the ability to separate linear and nonlinear absorption in solids,1 several nonlinear processes in gases have been observed,2 and Raman and two-photon spectra of liquids have been obtained.3,4 All indications are that nonlinear photoacoustic spectroscopy, NLPAS, will be as fruitful a field as linear photoacoustic spectroscopy has been in the past.","PeriodicalId":202661,"journal":{"name":"Second International Meeting on Photoacoustic Spectroscopy","volume":"342 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":"133922966","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
Photoacoustic and Photorefractive Laser Detection and Spectroscopy 光声和光折变激光探测与光谱学
Second International Meeting on Photoacoustic Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/pas.1981.ma5
A. Rosencwaig
{"title":"Photoacoustic and Photorefractive Laser Detection and Spectroscopy","authors":"A. Rosencwaig","doi":"10.1364/pas.1981.ma5","DOIUrl":"https://doi.org/10.1364/pas.1981.ma5","url":null,"abstract":"The measurement of low-level optical absorptions of highly transparent and highly reflective solids is of considerable importance in several fields. In addition, the ability to measure very low-level linear absorptions also permits the study of several weak nonlinear optical phenomena, such as two-photon absorption.","PeriodicalId":202661,"journal":{"name":"Second International Meeting on Photoacoustic Spectroscopy","volume":"173 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":"121034060","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
Collisional Relaxation Times for Nitric Acid Vapor 硝酸蒸气的碰撞松弛时间
Second International Meeting on Photoacoustic Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/pas.1981.mb2
L. Farrow, R. Richton
{"title":"Collisional Relaxation Times for Nitric Acid Vapor","authors":"L. Farrow, R. Richton","doi":"10.1364/pas.1981.mb2","DOIUrl":"https://doi.org/10.1364/pas.1981.mb2","url":null,"abstract":"It has been shown previously1 that it is possible to obtain information on gas phase collisional relaxation rates from the amplitude rather than the phase of the signal coming from the microphone of an optoacoustic cell. In that earlier work,1 we proposed a detailed theory, based on a numerical solution of the heat diffusion equation, to relate the microphone signal amplitude to collisional relaxation time. The theory was verified using mechanically chopped single frequency infrared laser radiation at moderate power levels and at suitable wavelengths for absorption by nitric oxide, a diatomic gas with known spectroscopic and thermochemical properties.1 In the present paper, we apply the theory to experiments on dry nitric acid vapor, a polyatomic gas with nine vibrational modes.2","PeriodicalId":202661,"journal":{"name":"Second International Meeting on Photoacoustic Spectroscopy","volume":"14 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":"117299223","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
Improvement of The Sensitivity of Optoacoustic Trace Gas Analysis by Condensation* 冷凝法提高光声痕量气体分析灵敏度*
Second International Meeting on Photoacoustic Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/pas.1981.tub10
M. Slatkine
{"title":"Improvement of The Sensitivity of Optoacoustic Trace Gas Analysis by Condensation*","authors":"M. Slatkine","doi":"10.1364/pas.1981.tub10","DOIUrl":"https://doi.org/10.1364/pas.1981.tub10","url":null,"abstract":"The optoacoustic effect has been used to detect atmospheric pollutants at concentration levels as low as ~ 10−10 volume/volume. Both nonresonant [1] and resonant [2] cells have been used to achieve these detectivity limits. The limiting acoustic noise was about an order of magnitude above the Brownian noise of the ideal membrane inserted in the optoacoustic cell. The optoacoustic effect has also been used in liquids to measure low concentration traces [3] as well as ultralow absorption of visible radiation by pure water [4]. The noise equivalent concentration in liquids approached the ~ 10−11 limit.","PeriodicalId":202661,"journal":{"name":"Second International Meeting on Photoacoustic Spectroscopy","volume":"10 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":"115423627","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
Photoacoustic Optical and Infrared Detector 光声光学和红外探测器
Second International Meeting on Photoacoustic Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/pas.1981.tub8
S. I. Yun
{"title":"Photoacoustic Optical and Infrared Detector","authors":"S. I. Yun","doi":"10.1364/pas.1981.tub8","DOIUrl":"https://doi.org/10.1364/pas.1981.tub8","url":null,"abstract":"In recent years there has been a rapid rise of interest in the photoacoustic (PA) effect and its applications in the investigation of gases, liquids, and solids1-17). The basic principles and the theory of the PA effect are now well established18–21). The primary source of the acoustic signal is the periodic heat flow from the sample to the surrounding gas, as the sample enclosed within a gas cell is cyclically heated by the absorption of chopped light. The periodic flow of this heat into the gas cell produces pressure fluctuations which are detected by a sensitive condenser microphone as an acoustic signal. The present research applies the technique of PA spectroscopy to the detection of the optical and infrared(IR) radiation itself. In PA energy conversion process, the thermal properties of the sample play an important role. Therefore this PA optical and IR detector can be classified as the thermal detector. The operation principle of this detector is different from those of presently available optical and IR detectors22-24). The sketch of PA optical and IR detector is shown in Fig. 1.","PeriodicalId":202661,"journal":{"name":"Second International Meeting on Photoacoustic Spectroscopy","volume":"21 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":"125943627","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
Non-Radiative Quenching in Iodine Vapor at 514.5 and 488 nm 碘蒸气在514.5和488nm处的非辐射猝灭
Second International Meeting on Photoacoustic Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/pas.1981.tub3
D. H. Leslie
{"title":"Non-Radiative Quenching in Iodine Vapor at 514.5 and 488 nm","authors":"D. H. Leslie","doi":"10.1364/pas.1981.tub3","DOIUrl":"https://doi.org/10.1364/pas.1981.tub3","url":null,"abstract":"The previous paper discussed the optoacoustic characteristics of a simple spectrophone cell containing Iodine vapor, in a room air background. Here we discuss the unique effects of oxygen in the background gas as revealed in the spectrophone data, and we relate some results concerning the use of the spectrophone in analyzing non-radiative phenomena in the excited states of molecular Iodine.","PeriodicalId":202661,"journal":{"name":"Second International Meeting on Photoacoustic Spectroscopy","volume":"37 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":"124266352","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
Quantitative Fourier Transform Infrared Photoacoustic Spectroscopy of Condensed Phases 凝聚相的定量傅里叶变换红外光声光谱
Second International Meeting on Photoacoustic Spectroscopy Pub Date : 1900-01-01 DOI: 10.1364/pas.1981.tua2
Y. Teng, B. Royce
{"title":"Quantitative Fourier Transform Infrared Photoacoustic Spectroscopy of Condensed Phases","authors":"Y. Teng, B. Royce","doi":"10.1364/pas.1981.tua2","DOIUrl":"https://doi.org/10.1364/pas.1981.tua2","url":null,"abstract":"The application of Fourier transform techniques to photoacoustic spectroscopy has enabled this method to be extended into the important infrared spectral region between 4000 and 400 cm−1 [1-6]. In making experimental measurements the photoacoustic cell contains the material to be studied and replaces the instrument’s detector. After suitable filtration to remove signal frequencies outside those inherent to the spectral range being studied, the cell output is processed by the standard electronics of the FTIR spectrometer. Because of the selective absorption of the sample in the photoacoustic cell the interferogram has an appearance normally associated with an emission spectrum. The spectral information is therefore distributed over a wide range of path length differences in the interferometer rather than being largely in the \"central burst\" feature of the interferogram. The selective absorption also means that not all the energy incident on the sample is absorbed and so the central burst is smaller in amplitude than the corresponding feature for a black body absorber. When the data contained in the interferogram is transformed to obtain an absorption spectrum the resulting peak heights are not in the ratios expected due to a number of artifacts introduced by the technique. This paper is concerned with a discussion of these artifacts and procedures that may be employed to remove them so as to obtain a quantitatively correct sample spectrum. Experimental results are presented on some polymeric systems.","PeriodicalId":202661,"journal":{"name":"Second International Meeting on Photoacoustic Spectroscopy","volume":"61 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":"131809947","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
Acoustic Detection of Magnetic Resonance 磁共振声学检测
Second International Meeting on Photoacoustic Spectroscopy Pub Date : 1900-01-01 DOI: 10.1007/978-3-663-06820-4_28
H. Coufal
{"title":"Acoustic Detection of Magnetic Resonance","authors":"H. Coufal","doi":"10.1007/978-3-663-06820-4_28","DOIUrl":"https://doi.org/10.1007/978-3-663-06820-4_28","url":null,"abstract":"","PeriodicalId":202661,"journal":{"name":"Second International Meeting on Photoacoustic Spectroscopy","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":"128675766","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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