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Pure and Applied Optics: Journal of The European Optical Society Part A最新文献

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THIN-FILM CHEMICAL SENSORS WITH WAVEGUIDE ZEEMAN INTERFEROMETRY 波导塞曼干涉测量的薄膜化学传感器
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-11-01 DOI: 10.1088/0963-9659/7/6/006
P. Ayras, S. Honkanen, K. M. Grace, K. C. Shrouf, P. Katila, M. Leppihalme, A. Tervonen, Xiaoguang Yang, B. Swanson, N. Peyghambarian
{"title":"THIN-FILM CHEMICAL SENSORS WITH WAVEGUIDE ZEEMAN INTERFEROMETRY","authors":"P. Ayras, S. Honkanen, K. M. Grace, K. C. Shrouf, P. Katila, M. Leppihalme, A. Tervonen, Xiaoguang Yang, B. Swanson, N. Peyghambarian","doi":"10.1088/0963-9659/7/6/006","DOIUrl":"https://doi.org/10.1088/0963-9659/7/6/006","url":null,"abstract":"We describe a highly sensitive chemical sensor scheme using a channel waveguide with a selective surface coating based on polarimetric Zeeman interferometry. The sensing is based on measurement of the phase difference between TE and TM modes propagating in the anisotropic waveguide structure under exposure to toluene vapour. A real-time and reversible response at low ppm level is observed. Modelling results of the sensor structure to further increase its sensitivity are presented.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79494918","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: 9
Random fields of broken clouds and their associated direct solar radiation, scattered transmission and albedo 破碎云的随机场及其相关的太阳直接辐射、散射透射和反照率
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-11-01 DOI: 10.1088/0963-9659/7/6/017
S. Prigarin, B. A. Kargin, U. Oppel
{"title":"Random fields of broken clouds and their associated direct solar radiation, scattered transmission and albedo","authors":"S. Prigarin, B. A. Kargin, U. Oppel","doi":"10.1088/0963-9659/7/6/017","DOIUrl":"https://doi.org/10.1088/0963-9659/7/6/017","url":null,"abstract":"To model fields of broken clouds, we consider two methods based on Gaussian random fields and one method based on truncated random paraboloids. These models are determined by a few parameters only: the amount of cloud, the mean cloud base diameter and the mean cloud height. A field of broken clouds is a realization of such a random field, it is obtained by stochastic simulation and special spectral methods for Gaussian fields. The direct solar radiation S, the scattered transmission T and the albedo A of such a field of broken clouds are obtained by solving the stationary radiation transfer equation. Numerically we do this by variance reduction Monte Carlo methods. Varying the cloud parameters, the angle of incidence of the solar radiation we get interesting new functional relations between S, T and A for visible and infrared wavelengths.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73487470","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: 20
Coherent versus incoherent resonant emission: an experimental method for easy discrimination and measurement 相干与非相干共振发射:一种易于辨别和测量的实验方法
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-11-01 DOI: 10.1088/0963-9659/7/6/008
S. Ceccherini, M. Colocci, M. Gurioli, F. Bogani
{"title":"Coherent versus incoherent resonant emission: an experimental method for easy discrimination and measurement","authors":"S. Ceccherini, M. Colocci, M. Gurioli, F. Bogani","doi":"10.1088/0963-9659/7/6/008","DOIUrl":"https://doi.org/10.1088/0963-9659/7/6/008","url":null,"abstract":"The distinction between the coherent and the incoherent component of the radiation emitted from resonantly excited material systems is difficult experimentally, particularly when ultra-short optical pulses are used for excitation. We propose an experimental procedure allowing an easy measurement of the two components. The method is completely general and applicable to any kind of physical system; its feasibility is demonstrated on the resonant emission from excitons in a semiconductor quantum well.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73786633","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
A Fourier-transform-based interferometric technique for measuring the elastic anisotropy of a nematic liquid crystal 一种测量向列液晶弹性各向异性的傅立叶变换干涉技术
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-11-01 DOI: 10.1088/0963-9659/7/6/009
D. D. Feo, S. Nicola, P. Ferraro, P. Maddalena, G. Pierattini
{"title":"A Fourier-transform-based interferometric technique for measuring the elastic anisotropy of a nematic liquid crystal","authors":"D. D. Feo, S. Nicola, P. Ferraro, P. Maddalena, G. Pierattini","doi":"10.1088/0963-9659/7/6/009","DOIUrl":"https://doi.org/10.1088/0963-9659/7/6/009","url":null,"abstract":"We propose a method based on an interferometric technique to measure the molecular distortion induced by an incident light beam on a nematic liquid crystal film. An analysis of the fringe pattern generated by means of a Fourier transform method allows comparison of the measurements with the theoretical molecular distribution. From this analysis an estimation of the elastic anisotropy of the liquid crystal is derived which is in good agreement with previous results.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84921774","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: 4
LETTER TO THE EDITOR: On image quality of microlens arrays in diurnal superposition eyes 致编辑:关于微透镜阵列在昼夜叠加眼中的图像质量
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-11-01 DOI: 10.1088/0963-9659/7/6/004
R. Navarro, N. Franceschini
{"title":"LETTER TO THE EDITOR: On image quality of microlens arrays in diurnal superposition eyes","authors":"R. Navarro, N. Franceschini","doi":"10.1088/0963-9659/7/6/004","DOIUrl":"https://doi.org/10.1088/0963-9659/7/6/004","url":null,"abstract":"High-resolution compound eyes of the superposition type have been found in some diurnal insects, suggesting high-quality optics. Here we study whether a superposition eye could potentially achieve a higher resolution than that of a single, diffraction-limited facet, like in modern optical instruments made of a number of facets. We have developed a schematic diffractional model of the particularly acute superposition eye of the diurnal lepidopteran agaristid moth Phalaenoides Tristifica, and estimated the amount of aberrations required to fit the experimental data. Our results show that if the ommatidia were perfect (aberration-free) and perfectly aligned towards a common centre O, the resolution of the superposition image would be about 10 times higher than that provided by a single facet, and this in spite of the large phase lags between the pencils of light stemming from neighbouring ommatidia, due to the spherical geometry of the eye. In the insect species taken as a model system here, however, retinal sampling is too coarse to take full advantage of the high spatial frequency content of the superposition image. We show that the experimental data can be fitted if aberrations such as misalignment are introduced. A corollary of these results is that a superposition compound eye which was better constructed and avoided misalignment would provide its host with a better resolution than its `apposition eye counterpart'. This might explain why some diurnal compound eyes such as that of the fast-flying lepidopteran Macroglossum can afford sampling the focal image with a number of rhabdom exceeding the number of ommatidia (Warrant et al 1998 J. Exp. Biol. at press).","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87485762","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: 13
LETTER TO THE EDITOR: On the limit to the resolution of photoreflectance techniques for sensing analyte concentration at surfaces 致编辑的信:关于光反射技术在表面检测分析物浓度的分辨率限制
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-11-01 DOI: 10.1088/0963-9659/7/6/003
A. García-Valenzuela, J. Saniger
{"title":"LETTER TO THE EDITOR: On the limit to the resolution of photoreflectance techniques for sensing analyte concentration at surfaces","authors":"A. García-Valenzuela, J. Saniger","doi":"10.1088/0963-9659/7/6/003","DOIUrl":"https://doi.org/10.1088/0963-9659/7/6/003","url":null,"abstract":"We discuss the possibility of approaching a shot-noise-limited measurement of the difference reflectance due to analyte absorption or adsorption on the surface of a thin film, and estimate the resolution for a variety of cases. When using a 1 mW optical beam, the limit of resolution will commonly correspond to a small or very small fraction of a monolayer of the analyte.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86648738","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: 1
Time-varying coherency matrices and spectral coherency matrices 时变相干矩阵和谱相干矩阵
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-11-01 DOI: 10.1088/0963-9659/7/6/021
T. Tudor, I. Vinkler
{"title":"Time-varying coherency matrices and spectral coherency matrices","authors":"T. Tudor, I. Vinkler","doi":"10.1088/0963-9659/7/6/021","DOIUrl":"https://doi.org/10.1088/0963-9659/7/6/021","url":null,"abstract":"The problem of spectral analyses, in terms of optical observables, of the time-varying spinorial fields encountered in optics is presented. Time-varying coherency matrices and spectral coherency matrices are introduced. The spectral analyses of the output of a KDP electro-optical modulator is presented as an example. The paper is conceived as a contribution to the development of the language of the optics of observables.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85735396","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: 3
Multiple scattering and lidar returns 多重散射和激光雷达回波
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-11-01 DOI: 10.1088/0963-9659/7/6/007
P. Bruscaglioni, C. Flesia, A. Ismaelli, P. Sansoni
{"title":"Multiple scattering and lidar returns","authors":"P. Bruscaglioni, C. Flesia, A. Ismaelli, P. Sansoni","doi":"10.1088/0963-9659/7/6/007","DOIUrl":"https://doi.org/10.1088/0963-9659/7/6/007","url":null,"abstract":"Experimental evidence of multiple-scattering effects on lidar returns from clouds, as well as the calculated significance of second and higher orders of scattering, as can be found in the literature, are summarized, together with results of intercomparisons of theoretical and experimental results obtained by different researchers. New comparisons between analytic results and Monte Carlo data are reported, indicating the level of accuracy of predictions relevant to multiple scattering and lidar","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81343492","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: 13
A generalized source method for wave propagation 波传播的广义源方法
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-11-01 DOI: 10.1088/0963-9659/7/6/020
A. Tishchenko
{"title":"A generalized source method for wave propagation","authors":"A. Tishchenko","doi":"10.1088/0963-9659/7/6/020","DOIUrl":"https://doi.org/10.1088/0963-9659/7/6/020","url":null,"abstract":"A generalized source method is presented for the resolution of the problem of monochromatic wave propagation in non-homogeneous, isotropic structures. When implemented in the form of an iterative technique, it is demonstrated to give the exact analytical solution of the known problem of propagation in a two half-space structure. When implemented in the form of an integral expression, it is shown to give an exact solution under a normalized numerical convergence criterion. It thus represents a new powerful method for electromagnetic wave propagation in arbitrary structures, and also for the assessment of other resolution techniques proposed so far in optical wave propagation, diffraction and scattering.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80582354","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: 20
Increase of mean radiation intensity and decrease of albedo caused by water clouds: simulation results 水云引起的平均辐射强度增加和反照率降低:模拟结果
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-11-01 DOI: 10.1088/0963-9659/7/6/005
S. Prigarin, U. Oppel
{"title":"Increase of mean radiation intensity and decrease of albedo caused by water clouds: simulation results","authors":"S. Prigarin, U. Oppel","doi":"10.1088/0963-9659/7/6/005","DOIUrl":"https://doi.org/10.1088/0963-9659/7/6/005","url":null,"abstract":"By Monte Carlo simulation we investigate the two effects as a result of the specific radiation regime of the cloudy atmosphere caused by multiple light reflection between the clouds and the surface: the increase of solar radiation intensity near the Earth's surface and the decrease of the atmosphere - surface system albedo.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73503213","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: 1
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