We review the current status of single-photon-source and single-photon-detector technologies operating at wavelengths from the ultraviolet to the infrared. We discuss applications of these technologies to quantum communication, a field currently driving much of the development of single-photon sources and detectors.

Large format ultraviolet image sensors have been and are actively being developed for a variety of space borne astronomy missions The detector is historically one of the most problematic parts of any astronomical spacecraft and it plays a critical role in the overall capability of the instrument There are numerous detector systems with none being ideal for all applications This paper focuses on...

We report on the development of coatings for a charged-coupled device (CCD) detector optimized for use in a fixed dispersion UV spectrograph. Because of the rapidly changing index of refraction of Si, single layer broadband antireflection (AR) coatings are not suitable to increase quantum efficiency at all wavelengths of interest. Instead, we describe a creative solution that provides excellent...

the total vitamin c content in human plasma is widely accepted as an indicator of the tissue status of vitamin c. a liquid chromatography method with ultraviolet detector (264 nm) for measuring ascorbic acid in human plasma was developed. a c18 reversed-phase column and cetrimide as an ion-pairing agent was employed. ascorbic acid (aa) was measured after reducing l-dehydroascorbic acid to l-asc...

This paper describes the design and construction of automatic calibration unit (ACU) for JUNO experiment. The ACU is a fully automated mechanical system. It capable deploying multiple radioactive sources, an ultraviolet (UV) laser source, or auxiliary sensor such as temperature sensor, one at time, into central detector along axis. designed primary tool to precisely calibrate energy scale detec...

Results are reported on dual-band detectors based on a GaN/AlGaN structure operating in both the ultraviolet–midinfrared (UV– MIR) and ultraviolet–farinfrared (UV–FIR) regions. The UV detection is due to an interband process, while the MIR/FIR detection is from free carrier absorption in the emitter/contact followed by internal photoemission over the barrier at the GaN/AlGaN interface. The UV d...

In time-of-flight positron emission tomography (TOF-PET), the timing capabilities of scintillation-based detector play an important role. An approach for fast is using so-called metascintillators, which combine two materials leading to synergistic blending their favorable characteristics. added effect BGO-based metascintillators taking advantage better transportation Cherenkov photons through U...

Abstract We present the on-orbit performance of Colorado Ultraviolet Transit Experiment (CUTE). CUTE is a 6U CubeSat that launched on 2021 September 27 and obtaining near-ultraviolet (NUV; 2480 Å-3306 Å) transit spectroscopy short-period exoplanets. The instrument comprises 20 cm × 8 rectangular Cassegrain telescope, an NUV spectrograph with holographically ruled aberration-correcting diffracti...