Optofluidic Devices for Light Manipulation and

Optofluidic Devices for Light Manipulation and Bio-sensing, Fig. 1 Optofluidic circuit for hydrodynamic tunable... 

Optofluidic Devices for Light Manipulation and Bio-sensing, Fig. 4 Optical experimental pictures of partial refraction when the refractive indexes of the upper cladding are tuned at (a) 1.40 and (b) 1.43... 

Free-space optical manipulation techniques in microfluidic systems have recently generated a significant amount of interest. Classically the advantage of these optical approaches lies in their ability to provide remote operation and handle individual particles directly as opposed to indirect manipulation of the surrounding flow field. The precision with which particles can be transported and separated with these optical techniques makes them particularly useful for bio-medical analysis devices. While extremely flexible and relatively easy to implement (see the section on optofluidics - applications and optofluidics - techniques for fabrication and integration), these systems are ultimately limited by the fundamentals of the free-space optics. Specifically, the light-particle interaction length is... 

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