Compact purge system for fiber coupled THz-TDS systems

Compact purge system for fiber coupled THz-TDS system

A Compact, 3D printable Purge System for Terahertz Spectroscopy

We present the design of a compact purge system designed for the TeraSmart terahertz spectrometer offered by Menlo Systems, but compatible with other spectrometers based on fiber coupled photoconductive antennas. While connected to the nitrogen (or dry air) source, the system effectively deals with water vapor absorption that is a well-known issue in terahertz spectroscopy limiting a signal-to-noise ratio. The system was designed for the lens-based version of the TeraSmart spectrometer arranged in a linear configuration for transmission measurements. However, the underlying idea can also be adapted to a reflection configuration or a mirror-based spectrometer with off-axis parabolic mirrors mounted in a cage system

Database of frequency-domain terahertz reflection spectra for the DETRIS projec

Database med frekvens-domæne terahertz spektre fra DETRIS projekte

Méthodes innovantes de détection dans un liquide avec un bio-capteur à ondes de Lamb

BESANCON-BU Sciences Staps (250562103) / SudocSudocFranceF

Experimental data set for Effect of Variable Amplitude Block Loading on Intralaminar Crack Initiation and Propagation in Multidirectional GFRP Laminate

This data repository includes the necessary data to reproduce the results presented in the paper: "Effect of Variable Amplitude Block Loading on Intralaminar Crack Initiation and Propagation in Multidirectional GFRP Laminate" by the same authors. In this work, the initiation and propagation of intralaminar matrix cracks is investigated under Variabel Ampltide fatigue loading. The data acquisition is performed through a white light camera. For further details on the methodology the reader is refered to the paper. The data in this repository is not the raw image files due to size limitations. Instead, the presented data is the coordinates of the crack endpoints for every crack in each frame. With this data the reader can post-process the data in any way they see fit, and reproduce the results from the paper. The data set consists of data for 3 Constant Amplitude low load cases, 3 Constant Amplitude hig load cases, and 5 Variable Amplitude load cases. The data is stored in MATLAB .MAT files. However, the data can easily be imported into python using the "loadmat" function from scipy.io

Adiabatic bends in surface plasmon polariton band gap structures

Propagation and interaction of surface plasmon polaritons (SPPs) excited in the wavelength range 700–860 nm with periodic triangular arrays of gold bumps placed on gold film surfaces are investigated using a collection near-field microscope. We observe the inhibition of SPP propagation into the arrays within a certain wavelength range, i.e., the band gap (BG) effect. We demonstrate also the SPP propagation along a 30° bent channel obtained by an adiabatic rotation of the periodic array of scatterers. Numerical simulations using the Lippmann-Schwinger integral equation method are presented and found in reasonable agreement with the experimental results

Adiabatic bends in surface plasmon polariton band gap structures

Propagation and interaction of surface plasmon polaritons (SPPs) excited in the wavelength range 700–860 nm with periodic triangular arrays of gold bumps placed on gold film surfaces are investigated using a collection near-field microscope. We observe the inhibition of SPP propagation into the arrays within a certain wavelength range, i.e., the band gap (BG) effect. We demonstrate also the SPP propagation along a 30° bent channel obtained by an adiabatic rotation of the periodic array of scatterers. Numerical simulations using the Lippmann-Schwinger integral equation method are presented and found in reasonable agreement with the experimental results

Modeling the magnetostriction effect in elastomers with magnetically soft and hard particles

We analyze theoretically the field-induced microstructural deformations in a hybrid elastomer, that consists of a polymer matrix filled with a mixture of magnetically soft and magnetically hard spherical microparticles. These composites were introduced recently in order to obtain a material that allows the tuning of its properties by both, magnetically active and passive control. Our theoretical analysis puts forward two complementary models: a continuum magnetomechanical model and a bead-spring computer simulation model. We use both approaches to describe qualitatively the microstructural response of such elastomers to applied external fields, showing that the combination of magnetically soft and hard particles may lead to an unusual magnetostriction effect: either an elongation or a shrinking in the direction of the applied field depending on its magnitude. This behavior is observed for conditions (moderate particle densities, fields and deformations) under which the approximations of our models (linear response regime, negligible mutual magnetization between magnetically soft particles) are physically valid