Comment on 'Counterintuitive Dispersion Violating Kramers-Kronig Relations in Gain Slabs'

D. G. Baranov, A. A. Zyablovsky, A. V. Dorofeenko +2

In this Comment, we refute conclusions made in Phys. Rev. Lett. 112, 233601 (2014) by L.-G. Wang, L. Wang, M. Al-Amri, S.-Y. Zhu, and M. S. Zubairy. These conclusions stem from the…