On chip glucose sensing using guided waves at terahertz frequencies.

ABSTRACT: This paper demonstrates an on-chip anhydrous D-glucose sensor using a coplanar stripline (CPS) on a thin (1 [Formula: see text]m) silicon nitride membrane at terahertz (THz) frequencies. A thin layer (≈ 10 [Formula: see text]m) of D-glucose was placed in close proximity to the CPS and the transmission response was measured using a modified THz-TDS setup. The D-glucose introduces frequency-dependent changes to the effective permittivity of the CPS resulting in a modified spectral response at the receiver. Measurement results show absorption signatures at 1.42 THz and 2.07 THz corresponding to the first two significant resonances beyond 1 THz for D-glucose allowing for label-free detection. The frequency-dependent attenuation coefficient was estimated by simulation for several D-glucose laye

SUBMITTER: Haghighat M 

PROVIDER: S-EPMC11618766 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature