Three-dimensional frequency-domain modeling of airborne electromagnetic responses

1998 ◽  
Vol 29 (1-2) ◽  
pp. 111-119 ◽  
Author(s):  
Dmitry B. Avdeev ◽  
Alexei V. Kuvshinov ◽  
Oleg V. Pankratov ◽  
Gregory A. Newman
Keyword(s):  
Frequency Domain ◽  
Three Dimensional ◽  
Domain Modeling ◽  
Electromagnetic Responses ◽  
Airborne Electromagnetic

3D finite-difference frequency-domain modeling of controlled-source electromagnetic data: Direct solution and optimization for high accuracy

Geophysics ◽  
2009 ◽  
Vol 74 (5) ◽  
pp. F95-F105 ◽  
Author(s):  
Rita Streich
Keyword(s):  
Finite Difference ◽  
Frequency Domain ◽  
Electric Fields ◽  
Three Dimensional ◽  
Simulated Data ◽  
3D Models ◽  
Small Computer ◽  
Domain Modeling ◽  
Controlled Source ◽  
Em Field

Three-dimensional modeling of marine controlled-source electromagnetic (CSEM) data is vital to improve the understanding of electromagnetic (EM) responses collected in increasingly complex geologic settings. A modeling tool for simulating 3D marine CSEM surveys, based on a finite-difference discretization of the Helmholtz equation for the electric fields, has been developed. Optimizations for CSEM simulations include the use of a frequency-domain technique, a staggering scheme that reduces inaccuracies especially for horizontal electric-dipole sources located near the seafloor, and a new interpolation technique that provides highly accurate EM field values for receivers located in the immediate vicinity of the seafloor. Source singularities are eliminated through a secondary-field approach, in which the primary fields are computed analytically for a homogeneous or a 1D layered background; the secondary fields are computed using the finite-difference technique. Exploiting recent advances in computer technology and algorithmic developments, the system of finite-difference equations is solved using the MUMPS direct-matrix solver. In combination with the other optimizations, this allows accurate EM field computations for moderately sized models on small computer clusters. The explicit availability of matrix factorizations is advantageous for multisource modeling and makes the algorithm well suited for future use within an inversion scheme. Comparisons of simulated data for (1) 1D models to data generated using a 1D reflectivity technique and (2) 3D models to published 3D data demonstrate the accuracy and benefits of the approach.

Quasi-three-dimensional frequency-domain modeling to study size limitations of quantum-dot microdisk lasers

2010 ◽  
Vol 283 (20) ◽  
pp. 4046-4053
Author(s):  
K. Solis-Trapala ◽  
R.W. Smink ◽  
J. Molina-Vazquez ◽  
B.P. de Hon ◽  
A.G. Tijhuis ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Frequency Domain ◽  
Three Dimensional ◽  
Domain Modeling ◽  
Microdisk Lasers
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