Title :
Pulsed laser triggered high speed microfluidic switch
Author :
Wu, Ting-Hsiang ; Gao, Lanyu ; Wei, Kenneth ; Chiou, Eric Pei-Yu
Author_Institution :
Dept. of Electr. Eng., Univ. of California, Los Angeles, Los Angeles, CA
Abstract :
We report a high speed microfluidic switch capable of achieving a switching time of 70 musec. The switching mechanism is realized by exciting dynamic vapor bubbles with focused laser pulses in a microfluidic PDMS channel. A time-resolved imaging system has been constructed to capture the nanosecond transient channel wall deformation and the particle flow pattern. A switching of polystyrene microspheres in a Y channel has also been demonstrated. This ultrafast laser triggered switching mechanism has the potential to advance the sorting speed of the state-of-the-art microscale fluorescent activated cell sorting devices for two orders of magnitude.
Keywords :
bubbles; high-speed optical techniques; micro-optics; microchannel flow; microswitches; optical switches; polymers; Y channel; dynamic vapor bubble excitation; fluorescence-activated cell sorters; focused laser pulses; microfluidic PDMS channel; microfluidic switch; nanosecond transient channel wall deformation; particle flow pattern; polydimethylsiloxane; polystyrene microspheres; switching time; time 70 mus; time-resolved imaging system; ultrafast laser triggered switching mechanism; Aerodynamics; Biomedical optical imaging; High speed optical techniques; Microchannel; Microfluidics; Optical mixing; Optical pulses; Sorting; Switches; Ultrafast optics;
Conference_Titel :
Optical MEMs and Nanophotonics, 2008 IEEE/LEOS Internationall Conference on
Conference_Location :
Freiburg
Print_ISBN :
978-1-4244-1917-3
Electronic_ISBN :
978-1-4244-1918-0
DOI :
10.1109/OMEMS.2008.4607807
