Centre for Micro-Photonics

Optical nanostructure scattering microscopy and spectroscopy

Metallic and semiconductor nanoparticles are the functional building blocks of future nanophotonic devices. New optical properties of these particles are continually being discovered and rediscovered.

Observation of luminescence from gold nanorods is a good example. The phenomenon is fascinating, given that metals do not possess an energy bandgap to concentrate electron-hole pairs in defined states. It's heavily used as a non-linear luminescent marker in non-cytotoxic imaging of targeted cancer cells and in high-density optical storage.

In this project, we study optical nanostructures by means of linear and non-linear luminescence/scattering spectroscopy. This will allow us to understand the radiative energy decay paths. It also means we can control their quantum efficiency using size, shape, hybridisation and surface functionalisation.

In particular, the radiative decay enhancement will be manipulated by geometry variations in nanoparticles and structures.

One of the project’s aims is to develop non-toxic, highly efficient linear and nonlinear markers that are stable and free of blinking or bleaching. We are also developing highly efficient linear and nonlinear radiative markers for future nanophotonic applications.

We are collaborating with the following partners on this project:

  • Professor Michel Orrit | MoNOS, University of Leiden, Netherlands
  • Professor Byungkwon Lim | Sungkyunkwan University, Korea
  • Professor Peter Zijlstra | Technical University of Eindhoven, Netherlands.

Research staff

Project leader: Associate Professor James Chon