Usability of Tilted Plasmon Antenna with Structured Light

Photonics

Rafael Quintero-Torres¹  Jorge Luis Domínguez-Juárez¹  Mariia Shutova²  Alexei V. Sokolov² 

[1] Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Juriquilla, Querétaro 76230, Mexico;Institute for Quantum Science and Engineering, Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843-4242, USA;

关键词: plasmonic nanoantenna;    electric field norm;    tilted light incidence;   

DOI  :  10.3390/photonics8110504

来源: DOAJ

【 摘 要 】

We study the effect of oblique illumination on the functioning of a plasmonic nanoantenna for chiral light. The antenna is designed to receive a structured beam of light and produce a nanosized near-field distribution that possesses nonzero orbital angular momentum. The design consists of metal (gold) microrods laid on a dielectric surface and is compatible with well-developed nanofabrication techniques. Experimental arrangements often require such an antenna to operate in a tilted geometry, where input light is incident on the antenna at an oblique angle. We analyze the limitations that the angled illumination imposes and discuss approaches to mitigate these limitations. Through our numerical simulations, we find that tilt angles require modifications to the antenna design. Our analysis can guide current and future experimental configurations to push the limits of resolution and sensitivity.

【 授权许可】

Unknown