A complete noise analysis of a two-beam photopyroelectric ~thermal-wave! destructive interferometric sensor instrument is presented and compared to its single-beam, noninterferometric counterpart. The noise analysis is performed using a Green-function formalism applied to experimental observations. The instrumental background noise contribution from the detector and the amplifier is separated f...

We are presenting our recent results in development of a direct detector of submillimeter waves (bolometer) based on a microscopic power sensor coupled to an integrated antenna. An electrical NEP of 5×10 W/Hz at 0.1 K has been demonstrated in a dc measurement. A detailed description of design of a cryogenic system for optical evaluation of this detector is presented. Introduction In this report...

We have measured and characterized the thermal crosstalk in two different arrays of transition-edge sensor (TES) X-ray micro-calorimeters with frequency-domain multiplexing (FDM) readout. The TES are fabricated at SRON a 8$\times$8 32$\times$32 "kilo-pixel" uniform array. amount is evaluated as ratio between averaged signal pulse amplitudes. ratios (CR) for our detectors compliant requirements ...

2014 The first measurements on the Dayem bridge showed that the behaviour in an applied microwave field was quite different from that of the Josephson tunnel junction. Measurements on bridges one magnitude smaller later showed this difference to result from the bridge size. A very simple equivalent circuit was furthermore shown to characterize these small bridges. Analog computer calculations o...

The responsivity to long wavelength ~513 and 1253 mm! far-infrared ~FIR! radiation and the root mean square noise voltage has been measured for one bulk GaAs and two GaAs/AlGaAs multiquantum-well ~MQW! hot-electron photodetectors as a function of temperature from 4.49 to 77 K. From these data the noise-equivalent power ~NEP! was determined for each device over the same temperature range. The MQ...

A miniature (250 μm outer diameter) photoacoustic probe for endoscopic applications has been developed. It comprises a single delivery optical fibre with a transparent Fabry Perot (FP) ultrasound sensor at its distal end. The fabrication of the sensor was achieved by depositing a thin film multilayer structure comprising a polymer spacer sandwiched between a pair of dichroic dielectric mirrors ...

Noise performance is one of the most crucial aspects of any detector. Superconducting Microwave Kinetic Inductance Detectors (MKIDs) have an “excess” frequency noise that shows up as a small time dependent jitter of the resonance frequency characterized by the frequency noise power spectrum measured in units of Hz/Hz. Recent studies have shown that this noise almost certainly originates from a ...

The layered semiconductor material molybdenum disulfide (MoS2) has led to an upsurge in research for applications optoelectric devices that benefit from its excellent optical and electrical properties. application of the plasmonic structure enhance light–matter interaction intensity light field via localized surface plasmon resonance provides a promising method MoS2-based improving performance....

Neutral endopeptidase-24.11 (neprilysin; NEP/CD10) is a cell surface metallopeptidase expressed by prostatic epithelial cells that degrades various bioactive peptides including endothelin. Endothelin-converting enzyme (ECE), the key enzyme of endothelin biosynthesis, catalyses the final processing step in the pathway. Neuropeptide substrates of NEP, including endothelin, have been implicated in...

Short wave infrared (SWIR) imaging systems have several advantages due to the spectral content of the nightglow and better discrimination against camouflage. Achieving single photon detection sensitivity can significantly improve the image quality of these systems. However, the internal noise of the detector and readout circuits are significant barriers to achieve this goal. One can prove that ...