#finite-difference time-domain

[egenriether]

These are animated Finite-Difference Time-Domain (FDTD) simulations I've created in MATLAB. The modeled structure is a rectangular resonating cavity with perfectly conducting (PEC) walls. 3 Gaussian electric field pulses are defined at variable points in the cavity and propagate as electromagnetic waves. This cavity is half filled with a lossy dielectric (relative permittivity 4.2, conductivity 1S/m). It can be seen that the waves die out as they travel to the back of the structure along the y-axis and enter the lossy dielectric. This results in x-traveling waves only in the front of the structure. In the code these parameters are all variable.

​The simulation presented here is an animations of the x-component of the electric field on a horizontal slice at about the midpoint of the x-axis, giving a sample of the y-z plane. Since the walls are PEC it is seen that the x-component of the E field is identically zero at the boundaries.

Download the MATLAB file here: http://www.egenriether.com/fdtd.html

[egenriether]

These are Finite-Difference Time-Domain (FDTD) simulations I've created in MATLAB. The modeled structure is a rectangular resonating cavity with perfectly conducting (PEC) walls. 3 Gaussian electric field pulses are defined at variable points in the cavity and propagate as electromagnetic waves. Two different discretizations of the computational domain are shown the two different pulse widths. In the code these are all variable along with all other parameters.

​The simulations presented here are animations of the z-component of the electric field on a horizontal slice at about the midpoint of the z-axis, giving a sample of the x-y plane. Since the walls are PEC it is seen that the z-component of the E field is identically zero at the boundaries.

Download the MATLAB file here: http://www.egenriether.com/fdtd.html

[h-bar-over-two]

Still operating

So I'm pretty behind on quantum homework. It'll be a furious couple of weeks ahead for me until exams are done. Here's my list of things to do:

Quantum Homework: 5 (half done), 7 (more than half done), 8 (technically more than half done), 9, and 10 (hadn't started). They're all due by the end of the semester--May 13-ish.

Poster: I'm presenting a poster on finite-difference time-domain methods of electromagnetism for a couple of thin films I've been working on all year. A crew of us are heading to Jefferson Lab next Thursday and presenting, hopefully for a cash prize. Since it will be after Easter, I might be wearing my seersucker suit. 

Final Exams: I have one for Quantum (an oral/interview exam) and one for Nanotechnology Fundamentals (possibly written, but I've heard of another interview exam). 

Paper: I'm going to write up and attempt to publish a paper on this year's research. This will lead me into working on my thesis due at the end of the second year (oh wait, do I anticipate another opportunity for the seersucker?!?)

And that about scores up the last few weeks of my first year at graduate school. Fifty percent done!