[Todos] Coloquios DF - Mark Siemens (DU), Jueves 20/4, 14hs, Aula Seminario, 2do piso, Pab. I

[Augusto Roncaglia]

COLOQUIOS DEL DEPARTAMENTO DE F�SICA FCEYN - UBA


              En el Aula Seminario, 2do piso, Pab. I,

              Jueves 20/4, 14hs:

              MARK SIEMENS

              University of Denver



*Light with a twist: an introduction to twisted light with orbital angular
momentum*
We normally think of light as traveling straight between points in space,
but beams of light can rotate as they travel. In the simplest rotating
beams, individual light particles (photons) spin as they travel and this
“spin angular momentum� has been well understood for about 100 years. But
less than 20 years ago, the “orbital angular momentum� form of rotation was
discovered that leads to a “vortex� beam with a helical phase. These
quantized vortex beams have many exciting applications, including
controlling tiny micromachines, measuring star rotation, enabling
super-high-resolution imaging, and allowing communication with
theoretically-unlimited bandwidth.

Conventional methods for generating and measuring twisted light involved
either expensive and fixed-wavelength optics or computer-controlled
electro-optics such as a spatial light modulator. In this talk, I will 1.)
provide a tutorial explaining the basic concepts of twisted light, 2.)
discuss very simple methods for generating and measuring the orbital
angular momentum of light, and 3.) highlight some exciting potential
technical and scientific uses of twisted light.
------------ próxima parte ------------
Se ha borrado un adjunto en formato HTML...
URL: http://mailman.df.uba.ar/pipermail/todos/attachments/20170417/3f65e822/attachment.html