Faculty Members

NG, Jack Tsz Fai - Assistant Professor
吳紫輝

 

B..Sc. and Ph.D., Hong Kong University of Science and Technology

 

 

 

Contact: Rm. T907
Tel: (852) 3411-7039
Email: jacktfng@hkbu.edu.hk
Website: Optical Micromanipulation Theory Group

    Optical Micromanipulation:

     

  1. The manipulation of micron-sized particle by light

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    I research on the theory of optical micromanipulation – how optical force (light) can move and confine small micron-sized particles. The significance of optical forces can be seen in a “back-of-envelope” calculation: by focusing a 0.1W laser to a micron-sized particle and assuming modest momentum absorption of ~10%, the resultant acceleration can reach . This “astronomical” acceleration implies a great potential. Indeed, this technique is having major impacts on many important fields (e.g. Physics, Chemistry, Biology, engineering etc.) that involve small particles.

     

  3. Metamaterials and Transformation Optics

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    Transformation optics is a powerful method to design novel electromagnetic devices. For example, people have applied transformation optics to demonstrate theoretically the possibility of achieving invisibility and optical illusion. However, in order to build these devices, one needs materials with very special electromagnetic properties, which may not be available in nature. This is the reason why one needs metamaterials, which are man made materials that are designed to give a wide range of optical properties.

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