A decision feedback equalization slicer for ultra-high-speed backplane SerializerDeserializer with improved latch sensitivity. The method comprises selecting a RB from a plurality of RBs comprising a plurality of available subcarriers, according to a configuration, wherein the RB comprises a plurality of subcarriers; and removing the DC subcarrier from the plurality of subcarriers of the RB according to the configuration, to construct the shortened RB without the DC subcarrier. The authenticity indicator comprises a polarized-light selectively reflecting layer 30 that reflects a specified polarized component of incident light, and a transmission volume hologram layer 20 disposed on the front side of the polarized-light selectively reflecting layer 30. The fixed core includes a pull-in coil of aluminum wire, a holding coil of copper wire, and a magnetic core.