We recently reported on a Transition Edge Sensor (TES) composite bolometer for Fourier Transform spectroscopy which was designed, built and characterized. The design is based on a superconducting thermistor with SQUID readout, SiN membrane technology and a thin film metal mesh absorber which is optimized for the spectral range from 0.1 THz to 3 THz. A noise equivalent power (NEP) of 3.8×10-13 W...

A novel concept of the two-dimensional (2D) array of cold-electron nanobolometers (CEB) with double polarised cross-dipole antennas is proposed for ultrasensitive multimode measurements. This concept provides a unique opportunity to simultaneously measure both components of an RF signal and to avoid complicated combinations of two schemes for each polarisation. The optimal concept of the CEB in...

Smooth sidewall silicon micro-ring molds have been fabricated using resist reflow and thermal oxidation method. High Q factor polymer micro-ring resonators have been fabricated using these molds. Quality factors as high as 10(5) have been measured at telecommunication wavelength range. By carefully examining the different loss mechanisms in polymer micro-ring, we find that the surface scatterin...

In this work we theoretically investigate the responsivity/noise equivalent power (NEP) trade-off in graphene/semiconductor Schottky photodetectors (PDs) operating near-infrared regime and working at room temperature. Our analysis shows that responsivity/NEP ratio is strongly dependent on barrier height (SBH) of junction, derive a closed analytical formula for maximizing it. addition, discuss h...

We present our quantum efficiency (QE) and noise equivalent power (NEP) measurements of the meandertype ultrathin NbN superconducting single-photon detector in the visible to infrared radiation range. The nanostructured devices with 3.5-nm film thickness demonstrate QE up to ~10% at 1.3 – 1.55 μm wavelength, and up to 20% in the entire visible range. The detectors are sensitive to infrared radi...

A complete system modeling and characterization of a wideband differential terahertz (THz) direct detector, integrated in commercial CMOS technology, is presented. The detector consists recently developed double leaky-slot lens antenna that operates from 200 to 600 GHz combination with Schottky barrier diode (SBD) detection circuit. proposed methodology, starting low-frequency measurements on s...

Universities often lack a detailed understanding of the environmental backgrounds of their students. One way to improve understanding is through segmentation, which breaks down a population into groups of people with similar characteristics. This study aims to use segmentation to determine groups within the student population, based on environmental attitudes, and compare these groups in terms ...

Three topics will be presented in this paper: 1) study of the clusters and groups of galaxies found serendipitously in the North Ecliptic Pole (NEP) region of the ROSAT all-sky survey; 2) the highest redshift clusters found in the EMSS and the cosmological implications of their very existence; 3) the gravitational lensing in the EMSS X-ray selected clusters of galaxies observed by the Hubble Sp...

The origin and the evolution of universe are concealed in evanescent diffuse extragalactic background radiation (DEBRA). To reveal these signals, development innovative ultra-sensitive bolometers operating gigahertz band is required. Here, we review design experimental realization two bias-current-tunable sensors based on one dimensional fully superconducting Josephson junctions: nanoscale tran...