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Are photonic nanojets achromatic?
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Paper Abstract

In this work we study the evolution of the photonic nanojet (PNJ) phenomenon as the ratio of the sphere’s diameter over the illumination wavelength changes, for microspheres with diameters from 2μm to 100μm. We measure the focal point position by using 3D intensity scanning and identifying the maximum-intensity spot. We also measure the spot size at the focal plane using both intensity and phase data. Finally we use this information to compare the PNJ’s behavior to that of a ball lens and evaluate the importance of chromatic effect in the PNJ phenomenon.

Paper Details

Date Published: 4 March 2019
PDF: 9 pages
Proc. SPIE 10930, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XII, 109301C (4 March 2019); doi: 10.1117/12.2509654
Show Author Affiliations
Michail Symeonidis, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Myun-Sik Kim, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Toralf Scharf, Ecole Polytechnique Fédérale de Lausanne (Switzerland)


Published in SPIE Proceedings Vol. 10930:
Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XII
Georg von Freymann; Winston V. Schoenfeld; Raymond C. Rumpf, Editor(s)

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