Dr. Siddharth Ramachandran, Boston University
Light That Twists Inside Fibres
Tuesday, May 13, 2014
The City College of New York, Marshak Building, Room 418
Space is limited to the first 80 registrants, so please let your colleagues know.
In the last decade, one of the most extensively studied complex light beams are optical vortices, which possess phase or polarization singularities. These beams are interesting because they resemble the emission patterns of single molecule dipoles, or because they potentially represent an infinite set of eigenstates that can be constructed with light. Their use has been demonstrated in, or proposed for, several applications such as higher-dimensional quantum encryption, information capacity scaling, single-molecule spectroscopy and nano-scale imaging.
A recently developed fiber that has a ring-shaped core has enabled their stable generation and propagation in optical fibers for distances of up to kilometres. Since fibers are well known for their ability to offer nonlinear and dispersive tailoring of light, this additionally opens the door to studying and exploiting nonlinear phenomena with such beams. This talk will discuss recent results and intriguing possibilities enabled by fiber propagation of beams that have long been considered interesting, but hitherto unstable in nature.
You can find out more about Dr. Ramachandran's research HERE