Finesse of ring resonators

High finesse optical resonators for DOAS measurements

Using a high finesse optical resonator to provide a long light path for differential optical absorption spectroscopy: CE-DOAS J. Meinen, J. Thieser, U. Platt, and T. Leisner Institute for Meteorology and Climate Research, Aerosols and Heterogeneous Chemistry in the Atmosphere (IMK-AAF), Forschungszentrum Karlsruhe GmbH, Germany Institut for Environmental Physics (IUP), Atmosphere and Remote Sen...

Two-curve-shaped biosensor using photonic crystal nano-ring resonators

We design a novel nano-ring resonator using two-dimensional photonic crystal (2D-PhC), for bio-sensing applications. The structure of biosensor is created by two-curve-shaped ring resonator which sandwiched by two waveguides. These are configured by removing one row of air holes. The refractive index of sensing hole is changed by binding an analyte. Hence, intensity of the transmission spectrum...

Tunable Superconducting Split Ring Resonators

Spectral imaging of individual split-ring resonators.

We report on spectral imaging within individual silver split-ring resonators (SRRs) operating in the near infrared-visible range. We classified the optical eigenmodes from the measurement of their energies and nanometer scale spatial distributions. They are plasmonic standing waves that show great similarities with that of nanoantennas. We, however, evidenced marked differences in the near-fiel...

Nonlinear properties of split-ring resonators.

In this letter, the properties of split-ring resonators (SRRs) loaded with high-Q capacitors and nonlinear varactors are theoretically analyzed and experimentally measured. We demonstrate that the resonance frequency f(m) of the nonlinear SRRs can be tuned by increasing the incident power. f(m) moves to lower and higher frequencies for the SRR loaded with one varactor and two back-to-back varac...