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5 March 2021 Fiber-based planar antennas for spectroscopy and sensing
Navid Soltani, Nemanja Markesevic, Elham Rabbany Esfahany, Gregor Schulte, Sergey Druzhinin, Julian Müller, Florian Sledz, Holger Schönherr, Benjamin Butz, Mario Agio
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Proceedings Volume 11658, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XVIII; 1165809 (2021) https://doi.org/10.1117/12.2578494
Event: SPIE BiOS, 2021, Online Only
Abstract
Fluorescence detection is a well-established method for spectroscopy and sensing. However, since dye molecules are dipolar light sources, a large fraction of the emitted photons can be lost. An effective approach to overcome this problem relies on a planar antenna configuration, which beams the radiation pattern of the dye into a narrow cone. A planar antenna works like a Yagi-Uda antenna, but reflector and director elements are made of thin metal films. Here, by introducing a scanning optical fiber, which incorporates the reflector or the director, we demonstrate a tunable planar antenna for spectroscopic and sensing applications. Our results show that the radiation pattern narrows down to 26 degrees (FWHM), which implies a high collection efficiency by low-NA optics.
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Navid Soltani, Nemanja Markesevic, Elham Rabbany Esfahany, Gregor Schulte, Sergey Druzhinin, Julian Müller, Florian Sledz, Holger Schönherr, Benjamin Butz, and Mario Agio "Fiber-based planar antennas for spectroscopy and sensing", Proc. SPIE 11658, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XVIII, 1165809 (5 March 2021); https://doi.org/10.1117/12.2578494
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KEYWORDS
Antennas
Signal detection
Spectroscopy
Gold
Luminescence
Optical fibers
Reflectors
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