Bandwidth constraints for passive superluminal propagation through metamaterials

Summary, in English

Superluminal transmission of electromagnetic waves is usually observed in a narrow bandwidth range and the velocity outside this range is subluminal. In this paper, it is shown that the transmission coefficient for superluminal propagation through a periodic metamaterial structure satisfies a sum rule. The sum rule and its corresponding physical bound relate frequency regions with a phase velocity above an arbitrary threshold with the thickness of the slab. The theoretical results are illustrated with numerical examples.

• Författare: Mats Gustafsson
• Avdelning/ar: Institutionen för elektro- och informationsteknik
• Publiceringsår: 2012
• Språk: Engelska
• Sidor: 1015-1021
• Publikation/Tidskrift/Serie: Applied Physics A: Materials Science & Processing
• Volym: 109
• Issue: 4
• Länkar: http://dx.doi.org/10.1007/s00339-012-7407-3
• Dokumenttyp: Artikel i tidskrift
• Förlag: Springer
• Ämne: Electrical Engineering, Electronic Engineering, Information Engineering
• Status: Published
• Forskningsgrupp: Electromagnetic theory
• ISBN/ISSN/Övrigt: ISSN: 1432-0630