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| From the slope of flat blue band around 1565 nm, Altug and Vuckovic measure that the group velocity of this coupled dipole mode is below 0.008c (where c is the speed of light in air). The holes in their photonic crystal microcavity array (inset: bottom left) were 400 nm across with a period of 500 nm. (Image credit: J Vuckovich) |
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