Nano-plasmonic Bundt Optenna for broadband polarization-insensitive and enhanced infrared detection.

ABSTRACT: Infrared detection devices are becoming miniature with micro or nano-scale size. The advantages of downsizing come on the expense of insufficient collection of infrared radiation. Therefore, utilizing nano-plasmonic optical antennas becomes mandatory. However, it is desirable to develop antennas with broad bandwidth, polarization insensitivity, wide field-of-view, and reasonable plasmonic losses in order to collect most of incident infrared radiation and enhance power absorption efficiency. Here, an innovative optical antenna (optenna) is proposed and demonstrated for the first time. It has a novel shape of Bundt baking-pan. The gold Bundt is arranged in a periodic array that can be placed on top of a thin-film infrared absorbing layer. The developed optenna can squeeze infrared electric a

SUBMITTER: Awad E 

PROVIDER: S-EPMC6704059 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature