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A microfluidic refractive index sensor based on an integrated three-dimensional photonic crystal
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10.1063/1.2840700
/content/aip/journal/apl/92/7/10.1063/1.2840700
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/7/10.1063/1.2840700
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) A schematic diagram of the integrated 3D photonic crystal microfluidic sensor. (b) A SEM image of etched femtosecond laser etched microchannel above the photonic crystal and (c) an illustration of the unit cell for the woodpile photonic crystal structure, where and are the layer spacing and in-plane spacing, respectively.

Image of FIG. 2.
FIG. 2.

(a) FTIR spectrum of the integrated 24 layer photonic crystal sensor with and . The photonic band gap in the stacking direction produces an 85% suppression of the infrared transmission at and (b) an illustration of the 24 layer photonic crystal structure. (c) Photonic band structure calculation for the photonic crystal showing the photonic band gap at the normalized frequency of 0.2981. (d) FTIR spectrum of the integrated 24 layer photonic crystal sensor with , , and . The planar defect results in a FP resonance peak at and (e) an illustration of the photonic crystal with a planar defect between the 12th and 13th layers. (f) The photonic band structure calculation showing the band gap and defect resonance located at the normalized frequency of 0.315.

Image of FIG. 3.
FIG. 3.

The shift in the position of the photonic band gap (a) and defect resonance (b) as the index of refraction of the liquid in the microchannel is increased. The averaged refractive index of the photonic crystal sensor according to Eq. (1) is displayed on the secondary axis.

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/content/aip/journal/apl/92/7/10.1063/1.2840700
2008-02-20
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A microfluidic refractive index sensor based on an integrated three-dimensional photonic crystal
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/7/10.1063/1.2840700
10.1063/1.2840700
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