Terahertz path-length lens composed of oblique metal slit array

Autor:	Mamoru Mita, Takahisa Togashi, John C. Young, Takehito Suzuki, Keisuke Takano, Hideaki Kitahara, Masanori Hangyo
Rok vydání:	2014
Předmět:	Materials science Analytical expressions business.industry Terahertz radiation Oblique case General Chemistry Slit Optics Wave band Path length Robustness (computer science) Optoelectronics General Materials Science Effective refractive index business
Zdroj:	Applied Physics A. 118:397-402
ISSN:	1432-0630 0947-8396
Popis:	Need for high-performance and sophisticated optical devices in the terahertz wave band is growing rapidly with terahertz technological progress. This paper presents a lens in the terahertz wave band based on phase control using an oblique metal slit array. A convex oblique slit array can produce a focusing effect. This focusing effect is confirmed by full-wave analysis for the designed terahertz path-length lens. The effective refractive index computed from the full-wave analysis is consistent with analytical expressions and changes from 1.00 to 1.56 with the angle of the metal slit array. Full-wave analysis also confirms that the lamination errors of the path-length lens have limited influence on the focusing effects. The robustness of the lens design is essential for its industrial applications to terahertz optical devices.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::536531d5ca51a8a79fa65b025b44672c https://doi.org/10.1007/s00339-014-8918-x Zobrazit plný text záznamu Full text from SpringerLink