• home
• current students
• graduate
• events

Presenter: Jamal M. Ehtaiba
Supervisor:

Date: Tue, July 24, 2018
Time: 13:30:00 - 14:30:00
Place: EOW 430

ABSTRACT

Abstract: The Integration of an optical fiber with a metallic nano-aperture can improve the optical trapping performance of nanoscale objects. It can also enhance light emission from luminescent nano-particles (trapped within the nano-aperture) and couple the radiation into the low-loss optical fiber channel. In the first part of this seminar, I will talk about various approaches that have been proposed to generate single photons from different sources, e.g. atoms, molecules, and quantum dots. In the second part of the seminar, I will discuss a template-stripping approach for transferring a nano-aperture milled in a gold film to the tip of a single-mode fiber. The main objective of creating an integrated nano-aperture fiber tweezer is to study and test light emission from upconverting nanoparticles (UCNPs) as a potential source of single photons. UCNPs have been shown to be photostable light emitters in the visible range of the optical spectrum and have emission peaks at 545 nm, 660 nm, and 1550 nm. Polystyrene nanospheres and UCNPs of size 30nm were trapped in order to show the optical trapping ability of the integrated nanoaperture fiber tweezer, and the results were very promising.