Manipulation of Surface Plasmon Polaritons by Phase Modulation of Source Field with Inverse Problem Algorithm

Autor:	Zhenhua Li, Chuanfu Cheng, Guotao Liang, Meina Zhang, Chunxiang Liu
Rok vydání:	2014
Předmět:	Lens (geometry) Physics Field (physics) business.industry Phase (waves) Physics::Optics General Physics and Astronomy Source field Surface plasmon polariton Optics Plasmonic lens business Phase modulation Algorithm Plasmon
Zdroj:	Chinese Physics Letters. 31:057306
ISSN:	1741-3540 0256-307X
Popis:	The predetermined field distributions can be achieved by phase modulation of the source field to manipulate the propagation of surface plasmon polaritons (SPPs). The modulations of the radius of the circular slit are according to the phase distributions on the slit, which are calculated by using the Gerchberg—Saxton algorithm with the known field. We design the surface geometric shape of the radius-varied circular slit for exciting the SPP field with the linear, triangular, square and circular distribution characteristics, respectively. The slit structure designed for the circular field distribution is a plasmonic vortex lens that can be used to generate the vortex with the specified size of the primary ring, which shows that this heuristic method has the potential to devise plasmonic devices.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d46f89dcf5747a84fa590f63b96f19db https://doi.org/10.1088/0256-307x/31/5/057306 Zobrazit plný text záznamu