25 October 2005 Terahertz biochip based on optoelectronic devices
Author Affiliations +
The accurate detection of minute amounts of chemical and biological substances has been a major goal in bioanalytical technology throughout the twentieth century. Fluorescence dye labeling detection remains the effective analysis method, but it modifies the surroundings of molecules and lowering the precision of detection. An alternative label free detecting tool with little disturbance of target molecules is highly desired. Theoretical calculations and experiments have demonstrated that many biomolecules have intrinsic resonance due to vibration or rotation level transitions, allowing terahertz (THz)-probing technique as a potential tool for the label-free and noninvasive detection of biomolecules. In this paper, we first ever combined the THz optoelectronic technique with biochip technology to realize THz biosensing. By transferring the edge-coupled photonic transmitter into a thin glass substrate and by integrating with a polyethylene based biochip channel, near field THz detection of the biomolecules is demonstrated. By directly acquiring the absorption micro-spectrum in the THz range, different boiomecules can then be identified according to their THz fingerprints. For preliminary studies, the capability to identity different illicit drug powders is successfully demonstrated. This novel biochip sensing system has the advantages including label-free detection, high selectivity, high sensitivity, ease for sample preparation, and ease to parallel integrate with other biochip functionality modules. Our demonstrated detection capability allows specifying various illicit drug powders with weight of nano-gram, which also enables rapid identification with minute amounts of other important molecules including DNA, biochemical agents in terrorism warfare, explosives, viruses, and toxics.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ja-Yu Lu, Ja-Yu Lu, Li-Jin Chen, Li-Jin Chen, Tzeng-Fu Kao, Tzeng-Fu Kao, Hsu-Hao Chang, Hsu-Hao Chang, An-Shyi Liu, An-Shyi Liu, Yi-Chun Yu, Yi-Chun Yu, Ruey-Beei Wu, Ruey-Beei Wu, Wei-Sheng Liu, Wei-Sheng Liu, Jen-Inn Chyi, Jen-Inn Chyi, Ci-Ling Pan, Ci-Ling Pan, Ming-Cheng Tsai, Ming-Cheng Tsai, Chi-Kuang Sun, Chi-Kuang Sun, } "Terahertz biochip based on optoelectronic devices", Proc. SPIE 6013, Optoelectronic Devices: Physics, Fabrication, and Application II, 60130I (25 October 2005); doi: 10.1117/12.630033; https://doi.org/10.1117/12.630033

Back to Top