Andrew Cook

I'm a graduate student studying optical physics at the University of Oregon. I study classical electromagnetism and quantum chaos with my advisor, Jens Noeckel . I'm interested in understanding the fundamental differences between classical and quantum physics. I'm also interested in finding traces of chaos in optical resonators. Currently, I'm analyzing paraxial mixing between light's angular momentum with its polarization in cavities. I'm also studying electromagnetic modes that owe their existence to a sensitive Goos Haenchen phase shift. Finally, we're extending the semiclassical Bogomolny transfer operator to describe spin-orbit coupling in vector electromagnetic fields.

Fractally Patterned Poincare SOS

This is a surface of section that gives a phase space portrait of the ray dynamics of a truncated dome cavity. The y-axis is the azimuthal ray coordinate from theta=0 to theta=pi/2. The x-axis represents the momentum of the ray in the theta direction. This SOS is generated by taking a look at rays with a large phi momentum component. This geometry is only near-integrable. It should exhibit chaotic behavior, but where the chaotic sea begins is not obvious. All dots analyzed thus far at lower resolution scans turn out to be exteremly tiny stable orbits represented by concentric circles at higher resolution scans. Link to more images



Some of these maps were recently displayed in an art exhibit in Bend:


Publications

David Foster, Andrew K. Cook, and Jens U. Noeckel, "Degenerate Perturbation theory describing the mixing of orbital angular momentum modes in Fabry-Perot cavity resonators", (submitted to PRL 7/08/) PDF

"Goos Haenchen induced vector eigenmodes in a dome cavity",
David H. Foster, Andrew Cook, and Jens Noeckel,
Optics Letters 32, 12 1764-1766, 2007

"Cavity QED with Diamond Nanocrystals and Silica Microspheres",
Young-Shing Park, Andrew Cook and Hailin Wang,
Nano Letters, 6, 2075-2079, 2006

"The effects of microgravity on nanoparticle size distributions generated by the ultrasonic reduction of an aqueous gold-chloride solution",
Justin Reed, Andrew Cook, Dave Halaas, Paul Parazzoli, Alex Robinson, Tom Matula and Franz Grieser,
Ultrasonics Sonochemistry, 10, 285–289, 2003



Current LIBOR interest rates . For those following the economic crisis, this is a good metric for to indicate how much banks are lending each other. In this climate, high rates indicate a breakdown of our monetary system.
great map of local biking and running trails and parks.

Ridgeline Trail mileages: