Comment on ''Photonic Band Gaps: Noncommuting limit and the 'Acoustic Band'''

Abstract

This comment concerns the homogenization of 2D dielectric photonic crystals, and the fact that the limits $k\to 0$ ($k$ is the Bloch vector) and $\epsilon \to +\infty$ do not commute for $p$-polarized waves

4 pages, 1 figure, submitted to Phys. Rev. Lett