We design an ultra-compact active hybrid plasmonic ring resonator for lasing applications at deep sub-wavelength scale. The combined contributions of hybrid plasmonic mode, circular-shaped cross section of nanowire, and ring resonator structure with round-trip whispering-gallery cavity, benefit reduced metallic absorption loss, tight mode confinement, enhanced cavity feedback, achieving high qu...

We describe a number of multiplexing techniques which may be used for fibre-optic sensors in which the sensing element is a ring resonator . The basic optical unit comprises a sensing ring resonator connected to a second interrogating ring resonator of nearly equal length, and illuminated by a source of short coherence length. A number of such units may be combined to form an array, using coher...

Abstract A Möbius strip, fascinating for its unique topological property of being a one-side nonorientable surface, has inspired mathematicians, physicists, engineers, and artists many centuries. In coherent system, waves on the surfaces reveal rich dynamics due to interplay coherence topology. Here we experimentally observe resonances in ring resonator formed twisted optical fiber loop. The po...