Manipulation of micro-particles through optical interference patterns generated by integrated photonic devices.
Micro-particle transport and switch governed by guided-wave optical interference are presented. The optical interference, occurring in a directional coupler and a multi-mode interferometer made by inverted rib waveguides, results in a specific evanescent field dependent on wavelength. Through a detailed theoretical analysis, the field of induced optical force shows a correlative pattern associated with the evanescent field. Experimental results demonstrate that 10 μm polystyrene beads are propelled with a trajectory subject to the interference pattern accordingly. By launching different wavelengths, the polystyrene beads can be delivered to different output waveguide ports. Massive micro-particle manipulation is applicable.
National Tsing Hua University, Institute of Photonics Technologies, No. 101, Section 2, Kuang-Fu Road, HsinChu, Taiwan.
Li-Chung
LC
Hsu
Te-Chang
TC
Chen
Yao-Tsu
YT
Yang
Chieh-Yang
CY
Huang
Da-Wei
DW
Shen
Ya-Tzu
YT
Chen
Ming-Chang M
MC
Lee
D007368:Interferometry / Q000295:instrumentation / Q000379:methods*; D008027:Light; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation / Q000379:methods; D010316:Particle Size; D017785:Photons; D011137:Polystyrenes / Q000737:chemistry*
D011137:Polystyrenes