Results 141 to 150 of about 3,826 (299)
High Sensitivity Terahertz Bolometers as Room Temperature Detectors
, 2014 High sensitivity room temperature THz direct detectors made of YBa2Cu3O7-x nano-bridges, with a broadband optical coupling (0.1-2THz) are presented. An optical responsivity (RV) up to 45 V/W was measured at 400 GHz.
Bevilacqua, Stella +5 more
core +1 more source
Iterative Synthesis of Pyrene–Coronene Molecular Graphene Nanoribbons
Angewandte Chemie, EarlyView.An iterative approach delivers a new family of undoped, cove‐edged graphene nanoribbons with lengths up to 9.1 nm that exhibit both molar absorptivity and fluorescence brightness values on the order of 105 M−1 cm−1 and an intrinsic charge‐carrier mobility of 475 ± 32 cm2 V−1 s−1.
Miguel A. Medel +6 more
wiley +2 more sources
Parasitic mixing in photomixers as continuous wave terahertz sources
Scientific ReportsWe present observations of parasitic frequency components in the emission spectrum of typical photomixer sources for continuous wave (CW) terahertz generation. Broadband tunable photomixer systems are often used in combination with direct power detectors,
Michael Kocybik +2 more
doaj +1 more source
Polarisation-sensitive terahertz detectors
, 2016 We have developed a detector of coherent terahertz (THz) radiation that can recover the full polarisation state of a THz transient. The device is a three-contact photoconductive receiver, which is capable of recording two time-varying electric field components of a THz pulse simultaneously.
Johnston, M +6 more
openaire +1 more source
Recent Advances in Programmable Metasurfaces and Meta‐Devices
Advanced Electronic Materials, EarlyView.Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao +4 more
wiley +1 more source
We present continuous-wave terahertz (cw THz) detectors with record high dynamic range of up to 125 dB at 0.12 THz, for the first time. These outstanding detectors are based on rhodium-doped InGaAs.
Deumer, Milan +8 more
core +1 more source
Ultrastable Self‐Cross‐linkable Electro‐Optic Materials Based on a Bisanthracene Scaffold
Advanced Electronic Materials, EarlyView.A novel bisanthracene‐based self‐cross‐linkable electro‐optic chromophore (TD2) is developed. TD2 exhibits a high r33 of 141 pm/V and a cross‐linked Tg up to 195 °C, retaining 99.75% of its initial EO response after 500 h at 85 °C, showing record‐high thermal stability for single‐molecule self‐cross‐linking EO materials.
Xingtao Wang +6 more
wiley +1 more source
Diffractive Optics for GaN Terahertz Detectors Arrays
, 2017 Fabrication and experimental tests of materials and optics for Terahertz range used in field effect transistor detectors arrays are described. The method using diffractive optics, fabricated in 3D printing technology, was used for tests with GaN/AIGaN ...
Suszek, J. +11 more
core
Few-shot concealed object detection in sub-THz security images using improved pseudo-annotations
Scientific ReportsIn this research, we explore the few-shot object detection application for identifying concealed objects in sub-terahertz security images, using fine-tuning based frameworks.
Ran Cheng, Stepan Lucyszyn
doaj +1 more source