Optofluidic router based on tunable liquid-liquid mirrors


AU: 
Muller, P; Kopp, D; Llobera, A; Zappe, H
SO: 
LAB ON A CHIP
GTQ Authors: 
Research Lines: 
Photonic Lab-On-a-Chip
VL: 
14
IS: 
4
BP: 
737
EP: 
743
PY: 
2014
SN: 
1473-0197
IF: 
5.70
Year IF: 
2012
Abstract: 

We present an electrically tunable 1 x 5 optofluidic router for on-chip light routing. The device can redirect light from an optical input channel into five output channels by exploiting total internal reflection (TIR) at a liquid-liquid interface. The liquid-liquid mirrors, demonstrated for the first time, are tuned using integrated electrowetting-on-dielectrics (EWOD) actuators. The router is assembled from two chips fabricated by standard MEMS techniques. Through a combination of microfluidic with micro-optical components on chip, reliable light routing is achieved with switching times of [1.5-3.3] s, efficiencies of coupling into channels of up to 12%, optical cross-talk as low as -24 dB, a required drive voltage of 50 V, and a low power consumption of <5 mW, using a device 12 x 13 x 2 mm(3) in size. The optofluidic approach enables addressing of multiple channels over a broad wavelength range. Such optical routing capabilities are important for lab-on-chip devices focusing on optical spectroscopy, optical detection, or even optical manipulation. When integrated with external light sources and a low-cost disposable photonic lab-on-a-chip, the router could thus lead to novel laboratory measurement systems.

DT: 
Article en revistes indexades
Percentil: 
HIGH
Percentil Year: 
2012
Category: 
CHEMISTRY, MULTIDISCIPLINARY