The frequency resolution of an active waveguide ring resonator spectrometer is fundamentally limited by spontaneous emission noise produced by the gain medium. A closed-form expression for this resolution is derived, and the result is used to determine the minimum, rms, angular rotation rate, random walk error achievable by an active ring resonator gyroscope. An active waveguide ring resonator ...

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...

Using near-field microscopy, the performance of dielectric-loaded plasmonic waveguide-ring resonators (WRRs) operating at telecom wavelengths is investigated for various waveguide-ring separations. It is demonstrated that compact (footprint approximately 150 microm(2)) and efficient (extinction ratio approximately 13 dB) WRR-based filters can be realized using UV-lithography. The WRR wavelength...

Label-free optical biosensors are particularly interesting because of their ability to tightly confine light while avoiding complications often associated with label dependent detection. However, many traditional optical biosensors often store the majority of their optical energy in the waveguide core, leaving only the evanescent field to interact with biomolecules. In this work we develop nano...

Modal coupling between frequency-degenerate resonances of an optical ring resonator is a commonly observed phenomenon that results in adverse mode splitting. Traditionally, this coupling is attributed to Rayleigh scattering of a propagating electromagnetic wave into its associated degenerate counter-propagating mode from small perturbations to the dielectric material of the resonator. We have c...

We report that it is possible to obtain a cavity structure by the deformation of a unit cell of an split ring resonator (SRR) structure. We presented the Q-factor of the cavity resonance as 192 for an SRR-based single cavity. Subsequently, we brought two and three cavities together with an intercavity distance of two metamaterial unit cells and investigated the transmission spectrum of SRRbased...

Polina V. Kapitanova, Stanislav I. Maslovski, Ilya V. Shadrivov, Pavel M. Voroshilov, Dmitry S. Filonov, Pavel A. Belov, and Yuri S. Kivshar National Research University of Information Technologies, Mechanics and Optics, St. Petersburg 197101, Russia Instituto de Telecomunicações, Universidade de Coimbra, Pólo II, 3030-290 Coimbra, Portugal Nonlinear Physics Centre, Research School of Physics a...

The ultimate goal of metamaterial engineering is to have complete control over the electromagnetic constitutive parameters in three-dimensional space. This engineering can be done by considering either single meta-atoms or full meta-arrays. We follow the first route and perform numerical simulations of split-ring resonators, with different gap numbers and under varying illumination scenarios, t...

A-Chuan HSU , Yi-Kai CHENG, Kuan-Hung CHEN, Jyh-Long CHERN, Shich-Chuan WU, Ching-Fu CHEN, Hao CHANG, Yu-Hung LIEN and Jow-Tsong SHY Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 300, Taiwan, R.O.C. Microelectronics and Information System Research Center, National Chiao Tung University, Hsinchu 300, Taiwan, R.O.C. National Nano Device Laboratories, Hsinchu 30...

Filters based on complementary split-ring resonators present a large notch attenuation at the resonant frequency. An application of these very low cost filters to an audio system interfered by a mobile phone is presented in this paper.