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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Zhao Xu Kyungjun Song Mazumder, P. |
| Copyright Year | 2013 |
| Description | Author affiliation: Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan, Ann Arbor, MI, USA (Zhao Xu; Mazumder, P.) || Dept. of Nature-inspired Nano-converge Syst., Korea Inst. of Machinery & Mater., Daejeon, South Korea (Kyungjun Song) |
| Abstract | We demonstrate enhanced sensitivity to refractive index (n) change in THz sensing by using the spoofed surface plasmon polariton (SSPP) architecture modified with gap blocks. The transmission peak as a function of n is significantly sharpened through the introduction of the additional cavity resonance, and such phenomenon is strongly dependent on the geometric dimensions of the block structure as well as the choice of probe frequencies. Non-invasive THz bio-sensing is a promising alternative to conventional tagging-based sensing schemes. In response to the growing demand for lower detection limit, our SSPP gap structure can effectively reduce the sample usage by enabling localized sample deposition within the gap cavity. The differentiation of DNA molecules with distinct binding states is demonstrated, where the conformational change of a thin layer (1μm) of immobilized DNA can lead to significant switching of the waveguide transmittance. |
| Sponsorship | IEEE Nanotechnol. Counc. |
| Starting Page | 311 |
| Ending Page | 314 |
| File Size | 727663 |
| Page Count | 4 |
| File Format | |
| ISSN | 19449399 |
| e-ISBN | 9781479906765 |
| DOI | 10.1109/NANO.2013.6720829 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-08-05 |
| Publisher Place | China |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | DNA Refractive index Cavity resonators Sensors Probes Sensitivity Resonant frequency |
| Content Type | Text |
| Resource Type | Article |
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