Response to 'On the orthogonality of the phase velocity and its feasibility for plane waves'

Tom G. Mackay, Akhlesh Lakhtakia

Research output: Contribution to journalArticlepeer-review


A recent theoretical study of plane waves with orthogonal phase velocity is premised on incorrect assumptions. The conclusion reached therein - namely, that "a plane wave with orthogonal phase velocity cannot possess linear momentum" and therefore "cannot propagate at all" - is incorrect in general. (C) 2011 Elsevier GmbH. All rights reserved.

Original languageEnglish
Pages (from-to)280-281
Number of pages2
Issue number3
Publication statusPublished - 2012

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