Development of optical WGM resonators for biosensors

I. Brice; A. Pirktina; A. Ubele; K. Grundsteins; A. Atvars; R. Viter; J. Alnis

doi:10.1117/12.2297551

7 December 2017 Development of optical WGM resonators for biosensors

I. Brice, A. Pirktina, A. Ubele, K. Grundsteins, A. Atvars, R. Viter, J. Alnis

Proceedings Volume 10592, Biophotonics—Riga 2017; 105920B (2017) https://doi.org/10.1117/12.2297551
Event: The Second International Conference "Biophotonics-Riga 2017", 2017, Riga, Latvia

Abstract

Whispering Gallery Mode (WGM) resonators are very sensitive to nanoparticles attaching to the surface. We simulate this process using COMSOL Wave Optics module. Our spherical WGM resonators are produced by melting a tip of an optical fiber and we measure optical Q factors in the 105 range. Molecular oxygen lines of the air in the 760 nm region are used as reference markers when looking for the shifts of the WGM resonance lines. We demonstrate WGM microresonator surface coating with a layer of ZnO nanorods as well as with polystyrene microspheres. Coatings produce increased contact surface. Additional layer of antigens/antibodies will be coated to make high-specificity biosensors.

Citation Download Citation

I. Brice, A. Pirktina, A. Ubele, K. Grundsteins, A. Atvars, R. Viter, and J. Alnis "Development of optical WGM resonators for biosensors", Proc. SPIE 10592, Biophotonics—Riga 2017, 105920B (7 December 2017); https://doi.org/10.1117/12.2297551

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