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, 15 April 2001, Pages 145–151Proceedings of the 5th European Conference on Optical Chemical Sensors and Biosensors
Long-range surface plasmons for high-resolution surface plasmon resonance sensors, , , , , , a Department of Electrical Engineering, University of Washington, P.O. Box 352500, Seattle, WA 98195, USAb Institute of Radio Engineering and Electronics, Chabersk& 57, 18251 Prague, Czech RepublicWe present the application of long-range surface plasmons to a wavelength-modulated surface plasmon resonance sensor. Theoretical design parameters and experimental data are presented for two sensor designs, using either magnesium fluoride or Teflon AF-1600 as a dielectric buffer layer. The demonstrated sensitivity of the long-range surface plasmon resonance sensor in refractometric experiments is up to seven times higher than that of an equivalent conventional surface plasmon resonance (SPR) sensor, while the measured resolution is comparable. According to theoretical design calculations presented, further optimization of materials and layer thickness could reduce the resonance width while achieving even higher sensitivities, thereby creating a sensor with significantly better resolution than conventional SPR sensors.KeywordsLong-range surface plasmon; Teflon AF; Surface plasmon resonance; Optical sensorsGaret G. Nenninger received a B.S. degree in electrical engineering from the Massachusetts Institute of Technology, Cambridge, USA in 1991 and an M.S. degree in electrical engineering from the University of Washington, Seattle, USA in 1998. From , he worked as an instrumentation and control engineer for the Naval Sea Systems Command in Washington, DC. He is currently a Ph.D. degree candidate in the Department of Electrical Engineering at the University of Washington. His research interests include optical sensors, instrumentation, and sensor systems.Petr Tobi&ka received his M.Sc. degree in physics from Charles University, Prague, Czech Republic in 1996. He is currently a graduate student at Charles University, Prague and works at the Institute of Radio Engineering and Electronics, Prague. His research interest is in surface plasmons and their application in (bio)chemical sensing.Jirı́ Homola received his diploma in physical electronics from the Czech Technical University, Prague, Czech Republic in 1988, and a Ph.D. degree in the field of guided-wave optics from the Academy of Sciences of the Czech Republic in 1993. Since 1993, he has been with the Institute of Radio Engineering and Electronics of the Academy of Sciences of the Czech Republic, Prague, working on fiber optic sensors and surface plasmon resonance-based sensing devices. Currently, he is a research assistant professor at the University of Washington, Seattle. His research interests are in guided-wave optics, and optical sensors and biosensors.Sinclair S. Yee received B.S., M.S., and Ph.D. degrees in electrical engineering from the University of California, Berkeley, in , and 1965, respectively. In 1964, he joined the Lawrence Livermore Laboratory as a research engineer working on semiconductor devices. Since 1966, he has been on the faculty of the Department of Electrical Engineering at the University of Washington, where in 1974, he became a full professor. In , he was a NIH special research fellow, and since 1979, he has been an IEEE fellow. His main research interests are concerned with silicon-based and GaAs quantum well optical modulator devices, surface plasmon resonance, and microsensor arrays.
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