INTEGRATED WAVEGUIDE STRUCTURE FOR HIGHLY SENSITIVE THZ SPECTROSCOPY OF NANO-LITER LIQUIDS IN CAPILLARY TUBES | Zendy

Vladimir Matvejev | Zendy; Cathleen De Tandt | Zendy; Willy Ranson | Zendy; Johan Stiens | Zendy; Roger Vounckx | Zendy; Debby Mangelings | Zendy

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INTEGRATED WAVEGUIDE STRUCTURE FOR HIGHLY SENSITIVE THZ SPECTROSCOPY OF NANO-LITER LIQUIDS IN CAPILLARY TUBES

Author(s) -

Vladimir Matvejev,

Cathleen De Tandt,

Willy Ranson,

Johan Stiens,

Roger Vounckx,

Debby Mangelings

Publication year - 2011

Publication title -

electromagnetic waves

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.437

H-Index - 89

eISSN - 1559-8985

pISSN - 1070-4698

DOI - 10.2528/pier11090102

Subject(s) - capillary action , nano , terahertz radiation , spectroscopy , materials science , waveguide , optoelectronics , optics , physics , composite material , quantum mechanics

Terahertz dielectric spectroscopy permits the study of biomolecular interactions. However, water induces high attenuation of electromagnetic waves in the THz frequency range, obscuring the response of biomolecules. The developed sensor overcomes this problem by concentrating the THz wave propagating in an integrated waveguide on a small liquid volume contained within a capillary tube. Detailed electromagnetic modeling shows efiective interaction between the THz waves and liquids. Transmission measurement results for capillary tubes fllled with water and methanol mixtures demonstrate a substantial increase in sensitivity to changes of liquid permittivity. The current integrated sensor facilitates THz spectroscopy of biological liquids: a case study on bufiered human serum albumin solution demonstrates a great potential to complement biochemical analytical tools.

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