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Q: Fachverband Quantenoptik und Photonik
Q 39: Nano-Optics II
Q 39.7: Vortrag
Mittwoch, 2. März 2016, 16:00–16:15, f342
Fibre optic surface plasmon resonance sensor for smartphones — •Kort Bremer1, Johanna Walter2, and Bernhard Roth1 — 1Hanover Centre for Optical Technologies (HOT), Leibniz University Hannover, Nienburger Straße 17, 30167 Hannover, Germany — 2Institute of Technical Chemistry (TCI), Leibniz University Hannover, Callinstrasse 5, 30167 Hannover, Germany
We have demonstrated a low-cost fibre optic surface plasmon resonance sensor designed for smartphones [1] which might be applied for the monitoring of biologically relevant molecules, personalized health care or environmental sensing in the future. For the sensor, the LED and the camera at the back side of a smartphone are used as light source and detector, respectively, and no external electrical components are required for the operation. In a first application example the sensor was realized by using a plastic cladded silica glass fibre and an easy-to-implement silver coating technique. Light from the smartphone is coupled in and out of the optical fiber by using 45∘ fibre end-faces. A diffraction grating is applied in front of the camera to disperse the light into a line spectrum. In a proof of principle experiment the performance of the sensor was successfully evaluated by using different volume concentrations of glycerol solutions and a sensitivity of 5.96·10−4 refractive index units (RIU)/pixel for a RI values between 1.33 and 1.36 was obtained. In the talk we present our latest work towards higher sensitivity and functionalization of the sensor system.
[1] K. Bremer and B. Roth, Opt. Express 2015, 23 (13), 17179-17184