Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 9: Photonics II
Q 9.2: Vortrag
Montag, 29. Februar 2016, 14:45–15:00, f342
All-polymer optical WGM sensor approach — •Ann Britt Petermann1, Uwe Morgner2, and Merve Meinhardt-Wollweber1 — 1Hannover Centre for Optical Technologies (HOT), Leibniz University Hannover, Nienburger Strasse 17, D-30167 Hannover, Germany — 2Institute of Quantum Optics, Leibniz University Hannover, Welfengarten 1, D-30167 Hannover, Germany
Microcavities, which support whispering gallery modes (WGMs) are resonant optical sensors providing high quality factors. In recent years WGM sensors are continuously enhanced with respect to sensitivity and detection limit which is a highly promising feature in molecular analytics. One of the next steps is the implementation of WGM sensors for real-world applications, such as measurement of force and temperature or sensing of biomolecules. To this end, an all polymer WGM-sensor is being realized. For this purpose various polymer specific issues need to be addressed. Among others, the investigation of a suitable geometry of the resonator and a possible supporting structure is important. In an all-polymer device the commonly used excitation of the sensor with a tapered fiber is not possible. One aim is the design of a new coupling structure with high coupling efficiency. The performance of the polymer sensor compared to silica devices is crucial to determine the sensitivity range and the possible applications. Due to the fabrication, the Q-factor of polymer sensors will be smaller than that of silica sensors, which in turn leads to a smaller sensitivity. However, polymer based systems are attractive because of their diversity in refractive index and hydrophobicity and prospective mass fabrication.