Related Experiment Video
Updated: Jan 26, 2026

Fabrication of Zero Mode Waveguides for High Concentration Single Molecule Microscopy
Published on: May 12, 2020
Slot-waveguide biochemical sensor
Carlos A Barrios1, Kristinn B Gylfason, Benito Sánchez
1Instituto de Sistemas Optoelectrónicos y Microtecnología (ISOM), Universidad Politécnica de Madrid, Spain. cbarrios@die.upm.es
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.
Related Concept Videos
What is Photosynthesis?
Anatomy of Chloroplasts
Prokaryotic Transcriptional Activators and Repressors
Transcription of prokaryotic...
Protein Networks
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
Buffers
Key Elements for Plant Nutrition

