Abstract

We report an experimental demonstration of an integrated biochemical sensor based on a slot-waveguide microring resonator. The microresonator is fabricated on a Si3N4SiO2 platform and operates at a wavelength of 1.3μm. The transmission spectrum of the sensor is measured with different ambient refractive indices ranging from n=1.33 to 1.42. A linear shift of the resonant wavelength with increasing ambient refractive index of 212nm/refractive index units (RIU) is observed. The sensor detects a minimal refractive index variation of 2×104RIU.

© 2007 Optical Society of America

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