科研之友
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摘要
A new material applied in liquid-core waveguides made of polydimethysiloxane (PDMS) is reported. The microfluidic PDMS chips were moulded by a silicon wafer with a master pattern of photoresist SU-8. This new photopolymer material of Norland Optical Adhesive 89 (NOA 89) provides an optical index of refraction (n = 1.51) higher than those of PDMS (n = 1.41) and air (n = 1), thereby significantly generating a total internal reflection through the fluidic channels and solidified structures. With three distinct geometries, the optical propagation losses of infrared light with wavelengths ranging from 1500-1550 nm were found to be -3.5 dB/cm (straight-line shape), -8.4 dB/cm (circular-bend shape) and -13.2 dB/cm (rectangular-bend shape), respectively.
- 出版日期2012-11
