Bounds for the group velocity of electromagnetic signals in two phase materials

• Published in: Physica. B, Condensed matter Vol. 279; no. 1; pp. 9 - 12
• Main Authors: Sølna, K, Milton, G.W
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.04.2000
• Subjects: Effective parameters; Electromagnetic wave propagation; Group velocity; Homogenization; Homogenization; Group velocity; Electromagnetic wave propagation; Effective parameters

The energy associated with an electromagnetic signal travels in general with the group velocity. We consider the group velocity of a composite and ask the question whether the group velocity in the composite can be higher than in either of the constituent phases. Here we show that it can, and by a l...