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Surface plasmon resonance waveguide biosensor by bipolarization wavelength interrogation

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41 Scopus citations

Abstract

A new surface-plasmon-resonance (SPR) waveguide biosensor with the capability of bipolarization wavelength interrogation is presented. In the conventional SPR biosensors, only the transverse magnetic (TM)-polarized lightwave can couple with the surface plasma wave. The proposed SPR biosensor can make both the TM- and the transverse electric (TE)-polarized lightwave to produce the SPR. Therefore, two kinds of biomaterials can be separately detected by the signals from the TM- and the TE-polarized modes, and the number of detectable materials in a single chip can be doubled. Human serum albumin is coated on the device to sense the concentration of beta-blocker. Experimental results show that the concentration of beta-blocker is related to the SPR wavelength shift at a rate of 0.08 and 0.027 nm/ppm for the TM- and the TE-polarized modes, respectively.

Original languageEnglish
Pages (from-to)1715-1717
Number of pages3
JournalIEEE Photonics Technology Letters
Volume16
Issue number7
DOIs
StatePublished - Jul 2004

Bibliographical note

Funding Information:
Manuscript received February 2, 2004; revised March 11, 2004. This work was supported by National Science Council, Taipei, Taiwan, R.O.C., under Contract NSC 92-2215-E-027-001. T.-J. Wang and C.-W. Tu are with the Institute of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10651, Taiwan, R.O.C. (e-mail: [email protected]). F.-K. Liu and H.-L. Chen are with the National Nano Device Laboratories, Hsinchu 30050, Taiwan, R.O.C. Digital Object Identifier 10.1109/LPT.2004.828376

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