dispersion (IMAGE) Kazan Federal University Caption Dispersion relations for TM Bloch modes in one-dimensional PC for different values of the refractive index (a) nh?=?2, (b) nh?=?3, (c) nh?=?5, (d) nh?=?7. The number of bands n in dispersion relations linearly increases with the refractive index of PC material host. Credit Kazan Federal University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.