University of California

Filippo Capolino

Franco De Flaviis

Alexander Figotin

William Thrift

S Ali Hosseini

Regina Ragan

Hamidreza Kazemi Varnamkhasti

Disclosed are example embodiments of a circuit comprising a first inductor-capacitor (LC) loop, a second LC loop having at least one of a series connection or parallel connection to the first LC loop, and a gyrator coupled between the first LC loop and the second LC loop. In an example, the first LC and the second LC loop each include an inductive element (L) and a capacitive (C) element coupled to each other in series. In another example, the first LC and the second LC loop each include an inductive element (L) and a capacitive (C) element coupled to each other in parallel.

Sensing circuit

Disclosed herein is an exceptional points of degeneracy (EPD) system with a resonator by introducing a linear time-periodic variation. In contrast, prior art systems with EPD require two coupled resonators with precise values of gain and loss and a precise symmetry of inductances and capacitances. The disclosed EPD system only requires the tuning of the modulation frequency or modulation depth, which can be easily achieved in electronic systems. The EPD is a point in a system parameters' space at which two or more eigenstates coalesce, and this leads to unique properties not occurring at other non-degenerate operating points. Also disclosed are experimental data showing the existence of a second order EPD in a time-varying single resonator and the expected sensitivity of its resonances to circuit perturbations. The disclosed EPD system exhibits structural degenerate and non-degenerate resonances whose dynamics dramatically boosts its sensitivity performance to very small perturbations. The unique sensitivity induced by an EPD can be employed to create exceptionally-sensitive sensors based on a resonator by simply applying time modulation.

Exceptional points of degeneracy in linear time periodic systems and exceptional sensitivity

Nanoarchitectures comprised of subwavelength metal nanosphere oligomers with uniform narrow gap spacings for plasmonic and metamaterial devices are described, as well as methods of fabrication thereof, a biosensor system based thereon, and methods of detection of pathogenic or other organisms (e.g., bacteria) using the same.

Metasurfaces comprised of nanosphere oligomers with uniform narrow gap spacings, their method of fabrication and applications in sensing

An apparatus, system, and/or method for a single planar feeding structure or antenna that may be integrated with one or more other system blocks is provided. The antenna may provide high radiation gain due to a large number of the radiating elements, which may be represented by one or more periodic openings or slots in a partially reflective surface (PRS). A feed network for the antenna may be provided by a wave bouncing between a ground plane and the PRS. The feed may be substantially in air, thereby suffering little to no loss. The fabrication process and/or method for the antenna is simple and low-cost. In one embodiment, the antenna may be formed at least in part by micromachining. The antenna may be designed at least in part using the Fabry-P&#xe9;rot Cavity (FPC) method.

Growing community of inventors

Irvine, CA, United States of America

Filippo Capolino