  One of the fascinating topological phenomena is the end state in one
dimensional system. In this work, the topological photonics in the dimer chains
composed by the split ring resonators are revealed based on the
Su-Schrieffer-Heeger model. The topologically protected photonic end state is
observed directly with the in situ measurements of the local density of states
in the topological nontrivial chain. Moreover, we experimentally demonstrate
that the end state localized at both ends is robust against a varied of
perturbations, such as loss and disorder. Our results not only provide a
versatile platform to study the topological physics in photonics but also may
have potential applications in the robust communication and power transfer.
