Joint Seminar-Depts of Theoretical & Experimental Physics

Prof. Sile Nic Chormaic, Seminar Speaker
Tuesday, October 4, 2022 - 16:30 to 18:30
Room 240, Technology, Society and Innovation Building (TSI), 2nd Floor, West Wing

The Departments of Theoretical and Experimental Physics have the pleasure in welcoming 

Prof. Sile Nic Chormaic, OIST Graduate University, Japan

to give a Joint Seminar on 4 October 2022.  We look forward to seeing you there.


From cold atoms to microbeads - manipulation using ultrathin optical fibres 

This talk will be concerned with some of the many applications of ultrathin optical fibres made from commercial optical fibres. Such fibres are very thin glass wires with a diameter typically less than the wavelength of propagating light and they are fabricated using a heat-and-pull technique. They can have very low propagation losses and are readily integrated with other fibre devices. One significant feature of optical nanofibres is the very intense evanescent light field around them even for low propagation powers, making them very useful for numerous applications. For example, optical nanofibres can be used for micro and nanoparticle manipulation, as optical couplers for whispering gallery resonators, and for atom trapping and control.

I will discuss some of these applications with an emphasis on the versatility of optical nanofibres as an experimental platform in:

(i)  probing, manipulating, and trapping cold ground state and Rydberg neutral atoms for quantum technology applications and
(ii) in microparticle manipulation for the exploration of fundamental phenomena of non-paraxial light fields.