University of Pennsylvania

Alessandro Salandrino

Nader Engheta

Andrea Alu

Brian Edwards

Circuits and circuit elements adapted to function at optical or infrared frequencies are made from plasmonic and/or nonplasmonic particles disposed on a substrate, where the plasmonic and nonplasmonic particles have respective dimensions substantially smaller than a wavelength of an applied optical or infrared signal. Such particles are deposited on a substrate in a variety of shapes and sizes from a variety of plasmonic and/or nonplasmonic materials so as to form resistors, capacitors, inductors and circuits made from combinations of these elements.

Optical circuits and circuit elements

A frequency-modulated coding and data recording and storage device that uses plasmonic-dielectric nanostructures of concentric two-layer core-shell design to store data includes a flat transparent substrate having a top surface divided into cells with side dimension d on the order of tens of nanometers and a core-shell plasmonic-dielectric nanostructure disposed in each cell. Each plasmonic nanostructure of concentric core-shell has a predetermined ratio of radii and a predetermined aspect ratio such that when an infrared or visible wavelength signal is applied to each said core-shell plasmonic-dielectric nanostructure a peak scattering amplitude of the applied signal is at different plasmonic resonance frequencies for core-shell plasmonic-dielectric nanostructures with different ratio of radii and different aspect ratios. The sampled values of a signal to be recorded are assigned to each cell and the ratio of radii and/or aspect ratios of the core-shell plasmonic-dielectric nanostructures in the assigned cells are selected to provide a corresponding plasmonic resonant frequency.

Frequency-modulated coding and data recording and storage using plasmonic nanostructures

Far-field sub-diffraction optical lenses 'FaSDOLs' comprise an anisotropic crystal having special dispersion characteristics such that it supports diffraction free propagation. An image with subwavelength features on the input surface is transferred through a propagation function to the output surface with effectively no, or minimal, loss in information. These special properties may be exploited in several ways, including but not limited to, magnification of an image at the input surface through the use an oblique cut at the output surface, magnification of an image at the input surface through use of a curved crystalline structure, and more generally near-field optical processing.

Growing community of inventors

Philadelphia, PA, United States of America

Alessandro Salandrino