Pure and Applied Optics: Journal of The European Optical Society Part A最新文献_第9页

Spontaneous emission in multilayer microcavities: modal theory extended with Fourier-Green analysis for dissipative structures 多层微腔中的自发发射:耗散结构的傅里叶-格林分析扩展的模态理论

Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-05-01 DOI: 10.1088/0963-9659/7/3/015

H. Rigneault, S. Maure, C. Amra

{"title":"Spontaneous emission in multilayer microcavities: modal theory extended with Fourier-Green analysis for dissipative structures","authors":"H. Rigneault, S. Maure, C. Amra","doi":"10.1088/0963-9659/7/3/015","DOIUrl":"https://doi.org/10.1088/0963-9659/7/3/015","url":null,"abstract":"Two rigorous theories are presented and compared to describe the interaction with the electromagnetic field of localized sources confined within microcavities. Both the light which can escape the structure and the embedded radiation are taken into account by these formalisms. The modal theory describes the field in terms of modal functions and is limited to lossless structures. On the other hand, the Green approach can naturally cope with lossy cavities and considers the coupling of the sources with a continuum of waves with spatial frequencies ranging from zero to infinity. The two theories are compared and the consequences of losses are investigated in the case of a current source located in the spacer of a resonant multilayer structure. It is shown that the modal theory gives correct predictions when the imaginary part of the refractive index is as large as , whereas the Green approach becomes necessary to describe the emission in lossy structures. In this last case, we show that the spontaneous emission factor is not strongly affected by losses, although the emitted power is decreased due to absorption.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76171716","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: 5

Focusing of two-dimensional electromagnetic waves through a plane interface 二维电磁波通过平面界面的聚焦

Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-05-01 DOI: 10.1088/0963-9659/7/3/018

J. Stamnes, D. Jiang

引用次数: 17

Aspherical wavefront measurements: Shack-Hartmann numerical and practical experiments 非球面波前测量:Shack-Hartmann数值与实际实验

Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-05-01 DOI: 10.1088/0963-9659/7/3/005

G. Artzner

{"title":"Aspherical wavefront measurements: Shack-Hartmann numerical and practical experiments","authors":"G. Artzner","doi":"10.1088/0963-9659/7/3/005","DOIUrl":"https://doi.org/10.1088/0963-9659/7/3/005","url":null,"abstract":"We consider an application of the original Hartmann method to bundles of rays generated by a Shack-Hartmann analyser. Absolute Shack-Hartmann measurements of converging wavefronts with the nominal method of collimating optics, used to locate the real image of a pupil on a microlens array, are not applicable when the wavefront asphericity is so strong that real subimages produced by individual lenslets of the array are no longer simultaneously focused at a common plane. As examples of strongly aspherical wavefronts we consider reflected beams obtained when testing large aspherical mirrors at their centre of curvature. Analytic formulae are applied to several instances and a ray-tracing program for a large-diameter strongly paraboloidal liquid mirror suggests that the Shack-Hartmann method could, however, be used by combining several cross sections of interlaced rays located downstream from the microlens array. In order to estimate how precisely subbundles of rays may be reconstructed from several cross sections we performed a small-scale experiment to measure an aspherical wavefront departing by more than from a best-fit sphere. A microlens array samples 2000 subareas per pupil. Eleven cross sections, corresponding to as many real and virtual subbundles of rays, are obtained upstream and downstream from an array using a relay optics to give enlarged real images on photographic film. We measured 57 subbundles and verified the straight line propagation of light to within a precision on negatives corresponding to a local 45 nm wavefront uncertainty. The uncertainty value for calibration using additional cross sections upstream and downstream from the microlens array amounts to 8 nm. We conclude from these numerical and practical experiments that the Shack-Hartmann method may be modified in order to measure strongly aspherical wavefronts, including reflected wavefronts obtained from centre-of-curvature testing for large aspheric mirrors.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77213159","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: 30

Some optical absorption critical points in layered ? crystals 层状介质的光学吸收临界点晶体

Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-05-01 DOI: 10.1088/0963-9659/7/3/009

V. Mushinski, M. Caraman, G. Lazăr, I. Lazar

引用次数: 0

Theoretical study of Talbot-like bands observed using a laser diode below threshold 用低于阈值的激光二极管观察塔尔博特带的理论研究

Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-05-01 DOI: 10.1088/0963-9659/7/3/013

A. Podoleanu, S. Taplin, D. Webb, D. Jackson

{"title":"Theoretical study of Talbot-like bands observed using a laser diode below threshold","authors":"A. Podoleanu, S. Taplin, D. Webb, D. Jackson","doi":"10.1088/0963-9659/7/3/013","DOIUrl":"https://doi.org/10.1088/0963-9659/7/3/013","url":null,"abstract":"We report on a theoretical study of an interferometric system in which half of a collimated beam from a broadband optical source is intercepted by a glass slide, the whole beam subsequently being incident on a diffraction grating and the resulting spectrum being viewed using a linear CCD array. Using Fourier theory, we derive the expression of the intensity distribution across the CCD array. This expression is then examined for non-cavity and cavity sources for different cases determined by the direction from which the slide is inserted into the beam and the source bandwidth. The theoretical model shows that the narrower the source linewidth, the higher the deviation of the Talbot bands' visibility (as it is dependent on the path imbalance) from the previously known triangular shape. When the source is a laser diode below threshold, the structure of the CCD signal spectrum is very complex. The number of components present simultaneously increases with the number of grating lines and decreases with the laser cavity length. The model also predicts the appearance of bands in situations not usually associated with Talbot bands.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79762072","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

Direct sampling for diffractive microlens encoding from a rigorous point of view 从严格的角度对衍射微透镜编码进行直接采样

Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-05-01 DOI: 10.1088/0963-9659/7/3/016

A. Schilling, P. Blattner, H. Herzig

引用次数: 1

UNIFORM ASYMPTOTIC DESCRIPTION OF THE BRILLOUIN PRECURSOR IN A SINGLE-RESONANCE LORENTZ MODEL DIELECTRIC 单共振洛伦兹模型电介质中布里渊前体的均匀渐近描述

Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-05-01 DOI: 10.1088/0963-9659/7/3/017

J. Solhaug, K. Oughstun, J. Stamnes, P. Smith

{"title":"UNIFORM ASYMPTOTIC DESCRIPTION OF THE BRILLOUIN PRECURSOR IN A SINGLE-RESONANCE LORENTZ MODEL DIELECTRIC","authors":"J. Solhaug, K. Oughstun, J. Stamnes, P. Smith","doi":"10.1088/0963-9659/7/3/017","DOIUrl":"https://doi.org/10.1088/0963-9659/7/3/017","url":null,"abstract":"It is well known that the dynamical evolution of the Brillouin precursor field in a single-resonance Lorentz model dielectric can be fully explained in terms of a pair of saddle points that evolve in a region of the complex -plane near the origin such that , where is the undamped resonance frequency of the dispersive medium. As time increases at a fixed propagation distance, these two near first-order saddle points first approach each other along the imaginary frequency axis, then coalesce into a second-order saddle point at the time , and finally separate from each other in the lower half-plane, one with an increasing real part and the other with a decreasing real part. The uniform asymptotic description of the Brillouin precursor provides an accurate description of the field evolution about the observation time , at which the saddle-point order changes discontinuously. However, previous approximate expressions for the phase behaviour in the region of the near saddle points have resulted in an inaccurate field evolution around . This inaccuracy is corrected in this paper. Numerical illustrations of the complete precursor evolution for the delta function pulse and the step function modulated signal are provided.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1998-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85556490","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: 12

Apodization of generalized axicons to produce uniform axial line images 普遍化的轴线，以产生均匀的轴线图像

Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-05-01 DOI: 10.1088/0963-9659/7/3/014

S. Popov, A. Friberg

引用次数: 36

Bactericidal effects of high-power Nd:YAG laser radiation on Staphylococcus aureus 高功率Nd:YAG激光辐射对金黄色葡萄球菌的杀菌作用

Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-05-01 DOI: 10.1088/0963-9659/7/3/020

C. Yeo, I. Watson, D. Stewart-Tull, A. Wardlaw, G. Armstrong

引用次数: 11

Interferometric studies on multi-mode step-index optical fibres 多模阶跃折射率光纤的干涉测量研究

Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-05-01 DOI: 10.1088/0963-9659/7/3/006

A. A. Hamza, A. Nasr

引用次数: 2