This Letter theoretically proposes and investigates an integrated plasmonic sensor that is based on a grating-assisted coupling between a surface plasmon polariton (SPP) and a dielectric waveguide (DW) mode. It consists of a glass slide with a gold film for the propagation of an SPP and a separate DW with a long-period grating. For sensing, the two parts are temporarily combined. After sensing, the former is replaceable, and so the sensor has disposability. The design procedure and analysis method for the sensor are explained. The designed sensor is shown to be very compact. Its characteristics of sensing a change of the refractive index of liquid are analyzed and discussed.
© 2010 Optical Society of America
Original Manuscript: August 20, 2010
Revised Manuscript: October 8, 2010
Manuscript Accepted: October 16, 2010
Published: November 11, 2010
Vol. 6, Iss. 1 Virtual Journal for Biomedical Optics
Min-Suk Kwon, "Disposable and compact integrated plasmonic sensor using a long-period grating," Opt. Lett. 35, 3835-3837 (2010)