University of Nebraska

J.a. Woollam Co.

The University of North Carolina at Charlotte

Harris Corporation Gcs

Tino Hofmann

Mathias M Schubert

Craig M Herzinger

John A Woollam

Martin M Liphardt

Stefan Schoeche

Daniel Schmidt

Rebecca Y Lai

Thomas E Tiwald

Patrick H Dussault

Andrea Holmes

Sean R Knight

Eva Schubert

Blaine D Johs

Susanne Madeline Lee

David S Hage

Gregory K Pribil

Erin Kathleen Sharma

Greg K Pribil

Tadas Kasputis

Angela K Pannier

Daniel Fullager

Erika Pfaunmiller

Venkata Rao Voora

Matias M Schubert

Philipp Kuehne

Materials comprising metamaterials exhibiting form-induced birefringence and anisotropic optical properties are provided. The disclosed articles comprise structures with critical dimensions which are on the order of or smaller than the wavelength for the gigahertz and terahertz spectral range. Methods of preparing same using stereolithography are disclosed. In a further aspect, the disclosed methods pertain to spectroscopic ellipsometry methods comprising a biaxial (orthorhombic) layer homogenization approach is to analyze the terahertz ellipsometric data obtained at three different sample azimuth orientations. The disclosed articles and methods demonstrate provide an avenue to fabricate metamaterials for the terahertz spectral range and allows tailoring of the polarizability and anisotropy of the host material. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

Methods and materials for metamaterials exhibiting form-induced birefringence

A sensor having a substrate is provided in which structures are disposed on a surface of the substrate. The structures can be, e.g., nanostructures. Polarized light is directed toward the sensor, and birefringence of the structures with respect to the light is measured. Target particles that interact with the structures are detected based on changes in the measured birefringence.

Optical sensing and separation based on ordered 3D nanostructured surfaces

Ellipsometers and polarimeters or the like to investigate analyte containing fluids applied to a substrate-stage having a multiplicity of nano-structures that project non-normal to a surface thereof, including dynamics of interaction therewith, to the end of evaluating and presenting at least partial Jones or Mueller Matricies corresponding to a multiplicity of locations over an imaged area.

Birefringence imaging chromatography based on highly ordered 3D nanostructures

Optical Hall Effect (OHE) method for evaluating such as free charge carrier effective mass, concentration, mobility and free charge carrier type in a sample utilizing a permanent magnet at room temperature.

Integrated vacuum-ultraviolet, mid and near-ultraviolet, visible, near, mid and far infrared and terahertz optical hall effect (OHE) instrument, and method of use

Disclosed are systems and methods that enable determination of uncorrelated thickness of a working electrode and surface region optical constants in settings involving electrochemical processing at a working electrodes in a Piezoelectric Balance system, by simultaneous application of an Ellipsometer system, the working electrode optionally having a multiplicity of nanofibers that are oriented non-normally to a surface of said working electrode. Further disclosed is, simultaneous with said determinations, the monitoring of electrochemical processes at a piezoelectric balance working electrode driven by electrical energy applied between said working electrode and counter electrode.

Combined use of oscillating means and ellipsometry to determine uncorrelated effective thickness and optical constants of material deposited at or etched from a working electrode that preferrably comprises non-normal oriented nanofibers

Anisotropic contrast methodology in combination with use of sample investigating polarized electromagnetic radiation to provide Jones or Mueller Matrix imaging data corresponding to areas on samples.

Method of obtaining micrographs of transparent or semi-transparent specimens using anisotropic contrast

System Stage, and Optical Hall Effect (OHE) system method for evaluating such as free charge carrier effective mass, concentration, mobility and free charge carrier type in a sample utilizing a permanent magnet at room temperature.

Integrated mid-infrared, far infrared and terahertz optical Hall effect (OHE) instrument, and method of use

Optical sensing and separation based on ordered three-dimensional nanostructured surfaces

A dual scanning and FTIR system for application in the Terahertz and broadband blackbody frequency range including sources for providing Thz and broadband blackbody range and electromagnetic radiation, at least one detector of electromagnetic radiation in the THZ and broadband blackbody ranges, and at least one rotating element between the source and detector.

Terahertz-infrared ellipsometer system, and method of use

The present invention relates to ellipsometer and polarimeter systems, and more particularly is an ellipsometer or polarimeter or the like system which operates in a frequency range between 300 GHz or lower and extending to higher than at least 1 Tera-hertz (THz), and preferably through the Infra-red (IR) range up to, and higher than 100 THz, including:

A memory device is provided. The memory device includes a plurality of memory cells and a controller to write data to and read data from the memory cells. Each memory cell includes a first semiconductor material having a spontaneous polarization, a resistive ferroelectric material having a switchable spontaneous polarization, and a second semiconductor material having a spontaneous polarization, the resistive ferroelectric material being positioned between and in contact with the first and second semiconductor materials. The memory device can be configured to store energy that can be released by applying a voltage pulse to the memory device.

Polarization-coupled ferroelectric unipolar junction memory and energy storage device

A tunable terahertz resonator includes a semiconductor substrate and a metal layer contacting a surface of the semiconductor substrate. A depletion layer is formed in the semiconductor substrate near an interface between the metal layer and the semiconductor substrate. A chiral nanostructure is coupled to the substrate or the metal layer, the chiral nanostructure including a conducting or semiconducting material and having an inductance. A bias circuit applies a bias voltage across the metal layer and the semiconductor substrate to control a capacitance of a tunable capacitor that includes the depletion layer. The chiral nanostructure and the tunable capacitor form a tunable resonant circuit. The tunable terahertz resonator can be used in a terahertz radiation emitter or receiver.

Terahertz resonator

A method of applying an ellipsometer or polarimeter system which operates in a frequency range between 300 GHz or lower and extending to higher than at least 1 Tera-hertz (THz), and preferably through the Infra-red (IR) range up to, and higher than 100 THz; wherein the ellipsometer or polarimeter system includes a source such as a backward wave oscillator, a Smith-Purcell cell, a free electron laser, an FTIR source or a solid state device; and a detector such as a Golay cell a bolometer or a solid state detector; and preferably includes at least one odd-bounce polarization state image rotating system and a polarizer, and at least one compensator and/or modulator, in addition to an analyzer.

A mass sensor is provided for determining the mass of small objects. The mass sensor has a plurality of nanostructures attached to a substrate. The nanostructures and the substrate are irradiated with an electromagnetic wave to determine a first mechanical-electromagnetic resonant frequency of the mass sensor. After a particle is attached to the nanostructures, the substrate and the nanostructures to which the particle is attached are irradiated with an electromagnetic wave to determine a second mechanical-electromagnetic resonant frequency of the mass sensor. A mass of the particle is determined based on a difference between the first and second mechanical-electromagnetic resonant frequencies.

Growing community of inventors

Lincoln, NE, United States of America

Tino Hofmann