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Title: Micro-light distribution system via optofluidic cascading prisms
Authors: Seow, Y.C.
Lim, S.P. 
Lee, H.P. 
Keywords: Cascading prisms
Light distribution
Liquid photonics
Microfluidic chip
Issue Date: Oct-2011
Citation: Seow, Y.C., Lim, S.P., Lee, H.P. (2011-10). Micro-light distribution system via optofluidic cascading prisms. Microfluidics and Nanofluidics 11 (4) : 451-458. ScholarBank@NUS Repository.
Abstract: This article reports a micro-light distribution system realized by altering the reflective indices of two optofluidic cascading prisms. Different micron scale light distribution configurations can be tuned via the imposed flow rates of the microfluidic mixers. The variable optical interface's reflectivity of the cascading prisms is based on the tuning of refractive indices of micromixed fluids within the cascading prisms. The microscale light distribution is achieved via total internal reflection and partial refraction occurs at the fluid-solid optical interfaces. 1 9 3 light switching denotes one optical inlet while the light can be guided via any one of the three optical outlets. The 1 9 3 light switching capability is demonstrated. The light splitting capability to achieve different proportion of light power distribution is also demonstrated and characterized. The optofluidic cascading prisms are integrated with micromixer, prolonging the working life of the optical compartment considerably as the fluids are only consumed when optical tuning is required. The proposed technique eliminates the disadvantage of optofluidic compartments based on liquid-liquid interfaces as liquid-liquid interface possess weaker mechanical stability than solid-liquid interface. The proposed design also does not require continuous supply of fluids as in optofluidic compartments based on liquid-liquid interfaces. The optofluidic cascading prisms can be cascaded further to form a complex planar light distribution system for seamless light distribution in lab-on-a-chip excitation and sensing applications. © Springer-Verlag 2011.
Source Title: Microfluidics and Nanofluidics
ISSN: 16134982
DOI: 10.1007/s10404-011-0810-9
Appears in Collections:Staff Publications

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