TL;DR
This paper reviews subwavelength aperture antennas in optics, focusing on their fundamental properties and diverse applications in biophotonics and nano-optics, highlighting recent advances and practical uses.
Contribution
It provides a comprehensive overview of aperture antenna types, their light-matter interaction enhancement, and their applications in sensing and nano-optical devices.
Findings
Enhanced light-matter interaction with aperture antennas
Applications in molecular sensing and biophotonics
Development of nano-optical sources, detectors, and filters
Abstract
This contribution reviews the studies on subwavelength aperture antennas in the optical regime, paying attention to both the fundamental investigations and the applications. Section 2 reports on the enhancement of light-matter interaction using three main types of aperture antennas: single subwavelength aperture, single aperture surrounded by shallow surface corrugations, and subwavelength aperture arrays. A large fraction of nanoaperture applications is devoted to the field of biophotonics to improve molecular sensing, which are reviewed in Section 3. Lastly, the applications towards nano-optics (sources, detectors and filters) are discussed in Section 4.
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