Searched for: subject%3A%22Scattering%22
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Müller, M. (author), Schins, J.M. (author), Wurpel, G.W.H. (author)
In multiplex CARS microscopy the generated anti-Stokes signal is generated and detected simultaneously over a significant part of the vibrational spectrum. The signal-to-noise ratio of the thus detected spectra is limited only by shot-noise. This principle is demonstrated using a dilution series of 2-propanol in water. It is derived...
conference paper 2004
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Dietrich, H.R.C. (author), Young, I.T. (author), Garini, Y. (author)
The study of DNA-protein interactions is gaining increased attention due to their importance in cellular processes. Only a well-functioning interaction guaranties that such a process can take place without errors. So far, only a small percentage of these interactions have been unraveled, partially due to their complexity but also due to the fact...
conference paper 2006
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Ito, K. (author), Toivanen, J. (author)
The time-harmonic acoustic scattering in multi-layered media is modeled with an inhomogeneous Helmholtz equation for the pressure field. For example, such problems result from acoustic geological surveys. The exterior problem is truncated into a rectangle and an absorbing boundary condition is posed on its boundaries. A low-order finite...
conference paper 2006
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Turkel, E. (author), Erlangga, Y.A. (author)
We consider acoustic scattering about a general body. This is described by the Helmholtz equation exterior to the body. In order to truncate the infinite domain we use the BGT absorbing boundary condition. The resultant problem in a finite domain is solved by a finite element procedure. This yields a large sparse system of linear equations which...
conference paper 2006
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Goldani Moghaddam, H. (author), Enright, W.H. (author)
Using a Differential Equation Interpolant (DEI), one can accurately approximate the solution of a Partial Differential Equation (PDE) at off-mesh points. The idea is to allocate a multi-variate polynomial to each mesh element and consequently, the collection of such polynomials over all mesh elements will define a piecewise polynomial...
conference paper 2006
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Van der Heul, D.R. (author), Van der Ven, H. (author), Van der Burg, J.W. (author)
Radar cross section prediction techniques are used to determine the radar signature of a military platform when the radar signature can not be determined experimentally, because the platform is not available or for reasons of time and cost. For classic jet aircraft the radar cross section for forward observation angles is dominated by the...
conference paper 2006
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Pereira, S.F. (author), Spronck, J.F.P. (author), Kutchoukov, V.G. (author), Bachor, H.A. (author)
We present simulations and experimental results on encoding information both in the longitudinal and transverse directions of an optical beam reflected from an asymmetric pit. The method does not require interferometric detection but is based on intensity measurements using a simple quadrant detector. In addition, we also discuss the...
conference paper 2010
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Pereira, S.F. (author), Spronck, J.F.P. (author), Kutchoukov, V.G. (author), Bachor, H.A. (author)
We present simulations and experimental results on encoding information both in the longitudinal and transverse directions of an optical beam reflected from an asymmetric pit. The method does not require interferometric detection but is based on intensity measurements using a simple quadrant detector. In addition, we also discuss the...
conference paper 2010
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Jäger, K. (author), Schulte, K. (author), Bittkau, K. (author), Ermes, A.M. (author), Zeman, M. (author), Pieters, B.E. (author)
The scattering properties of transparent conductive oxide (TCO) layers are fundamentally related to the performance of thin film silicon solar cells. In this study we introduce an experimental technique to access light scattering properties at textured TCO-silicon interfaces. Therefore we prepared a sample with a polished microcrystalline...
conference paper 2011
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Van Dijk, N.H. (author), He, S. (author), Paladugu, M. (author), Schut, H. (author), Van der Zwaag, S. (author)
conference paper 2011
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Brás, A.R. (author), Hövelmann, C. (author), Antonius, W. (author), Krutyeva, M. (author), Radulescu, A. (author), Allgaier, J. (author), Pyckhout-Hintzen, W. (author), Wischnewski, A. (author), Richter, D. (author)
In the present work we report on a Random Phase Approximation (RPA) which can be applied to multiblock copolymers consisting of supramolecular building blocks and hydrogen-bonded compounds including interactions in solution. These systems are model for the self-healing process due to the hydrogen-bonding interaction between the end-groups. This...
conference paper 2013
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Singh, S. (author), Snieder, R. (author), Behura, J. (author), van der Neut, J.R. (author), Wapenaar, C.P.A. (author), Slob, E.C. (author)
Recent work on autofocusing with the Marchenko equation has shown how the Green's function for a virtual source in the subsurface can be obtained from reflection data. The response to the virtual source is the Green's function from the location of the virtual source to the surface. The Green's function is retrieved using only the reflection...
conference paper 2014
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Hartstra, I.E. (author), Wapenaar, C.P.A. (author)
We discuss a method to interferometrically retrieve the body wave reflection response from local high-frequency scattering coda wave fields with the purpose to obtain an input dataset suitable for the application of advanced exploration-type imaging methods
conference paper 2015
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Cavallo, D. (author), Syed, W.H. (author), Neto, A. (author)
We present an analytical method to model artificial dielectric layers (ADLs) of finite height. Starting from the closed-form solution for the scattering from a single layer under plane wave illumination, the formulation is extended to the multi-layer case, by including the higher-order interaction between parallel layers in analytical form. The...
conference paper 2015
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Minato, S. (author), Ghose, R. (author)
The spatial heterogeneity along a fracture is a key determinant for fracture-associated hydraulic properties. We propose a new method to estimate the heterogeneous compliance distribution of a fracture from the reflection response at the fracture surface. For this purpose, we formulate a data-driven approach for Green's function retrieval based...
conference paper 2015
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Denisenkov, V.S. (author), Kiyko, V.V. (author), Vdovin, G.V. (author)
Laser speckle analysis is a very powerful method with various existing applications, including biomedical diagnostics. The majority of the speckle applications are based on analysis of dependence of scattered light intensity distribution from sizes of the scattereres. We propose a numerical model of speckle formation in reflected light in one...
conference paper 2015
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Singh, S. (author), Wapenaar, C.P.A. (author), van der Neut, J.R. (author), Snieder, R (author)
By solving the Marchenko equations, the Green’s function can be retrieved between a virtual receiver in the subsurface to points at the surface (no physical receiver is required at the virtual location). We extend the idea of these equations to retrieve the Green’s function between any two points in the subsurface; i.e, between a virtual source...
conference paper 2016
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Deckers, S. (author), Van Steerteghem, Nick (author), Glorieux, Christ (author), Verbiest, Thierry (author), van der Veen, M.A. (author)
We studied the effects of two types of ultrasonic waves, shear waves and longitudinal waves, using two nonlinear optical techniques, second-harmonic generation and hyper-Rayleigh scattering. Since shear waves hardly propagate in liquids, their influence on molecules at the interface between a surface and a liquid was studied using second...
conference paper 2016
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Cavallo, Daniele (author), Cantika Felita, Cantika (author)
We present an analysis of artificial dielectric layers (ADLs), when a lateral shift between layers is present. The alternate lateral displacement of the layers is an important parameter to engineer the desired effective electromagnetic properties of the ADL material. More specifically, much higher equivalent dielectric constants can be...
conference paper 2017
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Alpeggiani, F. (author), Parappurath, N. (author), Verhagen, Ewold (author), Kuipers, L. (author)
The scattering matrix is a fundamental tool to quantitatively describe the properties of resonant systems. In particular, it enables the understanding of many photonic devices of current interest, such as photonic metasurfaces and nanostructured optical scatterers. In this contribution, we show that the scattering matrix of a photonic system...
conference paper 2017
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