On-chip Terahertz Spectroscopy of Liquid Mixtures
- Swithenbank, M
- Russell, C
- Burnett, AD
- Li, L
- Davies, AG
- Cunningham, J
- Linfield, E
- Wood, CD
Publication date
August 2015
DOI Publisher
Institute of Electrical and Electronics Engineers (IEEE)Abstract
We demonstrate 'through-substrate' sensing of fluids for application in the terahertz spectroscopy of biological materials. This technique employs planar Goubau lines with integrated photoconductive material, formed on a flexible, thin polyimide substrate, and bonded to a microfluidic channel. Few-picosecond pulses are used to probe liquid samples confined within the channel, over a total interaction length of 4 mm, overcoming water-absorption limitations of free-space terahertz transmission measurements
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