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Optical Trapping

Non-contact optical probing and manipulation of nano/micro objects by laser irradiation presents many significant advantages over many conventional micro-manipulation techniques. This project envelops novel optical trapping probes for optical imaging, sensing and manipulation, particularly in the near-field region.


Project Overview:

Group:
Aim:
The aims of this project are to develop novel optical trapping probes for optical imaging, sensing and manipulation, particularly in the near-field region.
Members:

Research Overview:

The aims of this project are to develop novel optical trapping probes for optical imaging, sensing and manipulation, particularly in the near-field region, and to achieve technological advances in the following aspects:
  • Engineering of optical momentum and angular momentum including the development of FDTD simulation model for near-field scattering and trapping.
  • Optical nanometry system for measuring ultra-weak force and torque.
  • Optical trapping with ultrashort pulsed lasers and morphology dependent resonance.
  • Dynamic control of focal spots for near-field imaging, sensing and manipulation.

Achievements for 2008
  • Quang Tran graduated as first class honour student. His thesis title is "The use of FDTD to study soft materials under various laser trapping regimes".
  • Development of FDTD simulation models for non-linear optical media, anisotropic media, and nano-plasmonic structures.

Aims for 2009
  • Development of plasmonic trapping techniques for nanoparticle trapping and manipulation.
  • Development of near-field super-resolution techniques
  • Develop surface plasma enhanced evanescent fields for optical manipulation and sensing.
  • Laser trapping applications in micro-fluidic systems.


Optical stress (force per unit area) on a biconcave red blood cell under nearfield optical tweezers.

Group Leader:
Associate Professor
Xiaosong Gan

ph: +61 3 9214 8675
xgan@swin.edu.au

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