Title :
Performance Analysis of Resonance-Based Transducers in Terahertz Bio-Chips Using Equivalent Surface Impedance Model
Author :
Neshat, Mohammad ; Safavi-Naeini, Safieddin
Author_Institution :
Electr. & Comput. Eng. Dept., Univ. of Waterloo, Waterloo, ON, Canada
Abstract :
The concept of equivalent surface impedance is applied for electromagnetic modeling of thin-film samples, e.g., nano-layers of deoxyribonucleic acid, placed on a metallic surface. For the first time, it is shown that by using such a concept, the performance of resonance-based terahertz bio-chips can be easily evaluated in terms of analytic sensitivity and selectivity. Numerical results are presented for the performance of a planar resonator as an example when used as a transducer in a bio-chip sensor. The proposed model is general and can be applied to any resonant transducer with metallic surface for receiving thin-film samples.
Keywords :
DNA; biosensors; lab-on-a-chip; metallic thin films; molecular biophysics; nanobiotechnology; surface impedance; terahertz wave devices; transducers; deoxyribonucleic acid; electromagnetic modeling; equivalent surface impedance model; resonance-based transducers; terahertz bio-chips; Biosensors; DNA; Electromagnetic modeling; Frequency measurement; Gold; Impedance; Performance analysis; Resonance; Resonant frequency; Sensitivity; Sensor arrays; Surface impedance; Transducers; Transistors; Bio-chip; deoxyribonucleic acid (DNA); resonance; surface impedance; terahertz; transducer;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2065799