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  • Title: Slot-waveguide biochemical sensor.
    Author: Barrios CA, Gylfason KB, Sánchez B, Griol A, Sohlström H, Holgado M, Casquel R.
    Journal: Opt Lett; 2007 Nov 01; 32(21):3080-2. PubMed ID: 17975603.
    Abstract:
    We report an experimental demonstration of an integrated biochemical sensor based on a slot-waveguide microring resonator. The microresonator is fabricated on a Si3N4-SiO2 platform and operates at a wavelength of 1.3 microm. 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 212 nm/refractive index units (RIU) is observed. The sensor detects a minimal refractive index variation of 2x10(-4) RIU.
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