I will discuss recent development in scaling down photonics.First I will present theoretical and experimental investigation of passive low loss waveguide using hybrid plasmon design.We propose a new optical cavity design approach using indefinite medium that has a drastically different scaling law than conventional microcavities, and discuss its experimental demonstrations.Finally we will show an active plasmonic laser circuit that integrated with 5 tiny cavities that multiplexed into a single waveguide-an effort towards integrated photonics at nano-scale.