Nano-antennas excitation with visible light and their response as observed with a confocal microscope

Daniel Luis; Fernando Mendoza Santoyo; Jorge Mauricio Flores Moreno; Francisco Javier González Contreras; Javier Méndez-Lozoya

doi:10.1117/12.2529726

3 September 2019 Nano-antennas excitation with visible light and their response as observed with a confocal microscope

Daniel Luis, Fernando Mendoza Santoyo, Jorge Mauricio Flores Moreno, Francisco Javier González Contreras, Javier Méndez-Lozoya

Author Affiliations +

Proceedings Volume 11102, Applied Optical Metrology III; 111021N (2019) https://doi.org/10.1117/12.2529726
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

A century has gone by since antennas were used for the first time to control emission and reception of many types of electromagnetic radiation. The reescalation of antennas to smaller sizes and the need of on a chip devices motivated the manufacture of the so called nano-antennas that can focus farther than the diffraction limit. It is well known that metallic particles sustain resonance plasmonic modes in visible wavelengths, making them natural optic antennas. As happened with the conventional radiative antennas, nowadays it is important to characterize the radiation pattern emitted by these nano-antennas. In this research, we pretend to characterize at least qualitatively the dynamic behavior of super paramagnetic nanoparticles by exposing them to an electromagnetic field generated by excited nano-antennas of the bowtie type. We use a confocal microscope since it is a technique that increases the contrast of an image by using a pinhole that obstructs the light that is out of the focal plane. This results in a system that not only discriminates field of view over the focal plane, but it also permits depth selection inside of the specimen under observation.

Citation Download Citation

Daniel Luis, Fernando Mendoza Santoyo, Jorge Mauricio Flores Moreno, Francisco Javier González Contreras, and Javier Méndez-Lozoya "Nano-antennas excitation with visible light and their response as observed with a confocal microscope", Proc. SPIE 11102, Applied Optical Metrology III, 111021N (3 September 2019); https://doi.org/10.1117/12.2529726

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