Robert K. Thalhammer

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The space- and time-resolved distributions of charge carriers and temperature in the interior of microstructured semiconductor devices have become accessible to measurement as a variety of internal laser probing techniques has been become available. For a comprehensive theoretical analysis of these novel characterization methods, a physically rigorous model(More)
In recent years, internal laser probing techniques that exploit the electro-optical and the thermo-optical effects have been introduced. Space-resolved and time-resolved measurements of charge-carrier and temperature distributions in the interior of semiconductor samples have thus become possible. For a profound analysis and the optimization of these(More)
• The reference in the fourth line of the last paragraph on p. 65 should be Fig. 6. • On p. 63, the subsections of Section II-C2 “Boundary Conditions in Propagation Direction,” should be: a) Boundary condition in the kx–z-space; b) Matrix representation of the boundary conditions in real space. • In the Appendix, the correct plot for Fig. 12 is missing.(More)
Exploiting the dependence of the refractive index on carrier concentration and temperature, various infrared laser probing techniques enable the experimental analysis of the carrier and heat flow distributions in the interior of semiconductor devices. In this work we present a complete numerical simulation sequence for the whole measurement process. It(More)
The carrier distribution in the interior of power devices can be determined from free carrier absorption measurements. In this work, a physically rigorous simulation of the entire measurement process is performed to investigate the effects which arise from the wave propagation of the probing beam and the sample preparation. Quantitative results for the(More)
In Part I of this study [J. Opt. Soc. Am. A 20, 698 (2003)], we presented a physically rigorous model for simulating optical probing techniques. We now introduce the concept of virtual experiments as the fundamental strategy for analyzing the measurement techniques and for supporting the design of the experiments. Thus a theoretical study of parasitic(More)
In this paper, the principles of finite-element modeling for the electroacoustic simulation of bulk-acoustic-wave devices will be summarized. We will outline the model setup including governing equations and boundary conditions, as well as its efficient computer implementation. Particular emphasis will be given to tailoring the model dimension to the(More)
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