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We investigate asymmetric split ring resonators (SRR) for the THz frequency range. These SRRs exhibit sharp resonances and strong field localization, which is of potential interest e.g. for biosensing of minute amount of sample material. Our near-field measurements show the local response of the SRRs on a scale much smaller than the resonance wavelength of 320 mum. Fig. 1 depicts the spatially resolved...
Equivalent surface impedance is proposed to model an ultra-thin DNA monolayer in numerical simulations of THz bio-chips. Surface impedance model not only improves the accuracy, but also saves a large amount of computational resources compared to thin film dielectric model. Applying the proposed model to an existing bio-chip device predicts that electromagnetic properties of an ultra-thin DNA monolayer...
Recent developments for the label-free analysis of genetic material using THz systems are presented. Following a proof-of-principle initial approach, high-sensitivity integrated THz sensing systems reaching femtomol detection sensitivity and single base mutation capabilities are reviewed.
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