This work presents measured results demonstrating an uncooled infrared (IR) detector based on gallium nitride (GaN) micromechanical resonators. GaN-based photonic detectors are typically designed to operate in the ultraviolet (UV) regime as the absorption spectrum of wide-band gap GaN peaks at a wavelength of ~360 nm. In contrast, the transduction mechanism of the device presented in this work ...

Large format ultraviolet image sensors have been and are actively being developed for a variety of space borne astronomy missions The detector which historically is one of the most problematic parts of any astronomical spacecraft 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 presents an...

Single-photon imaging spectrometers of high quantum efficiency in the infrared to ultraviolet wavelength range, with good timing resolution and with a vanishing dark count rate are on top of the wish list in earth-bound astronomy, material and medical sciences, or quantum information technologies. We review and present improved operation of a cryogenic detector system potentially offering all t...

Analytical methods to check the purity of active pharmaceuticals have been described in pharmacopeias. HPLC-UV detection is the most common analytical liquid chromatography technique for impurity profiling in QC laboratories because of its ease-of-use, robustness, and reliability. However, there are many occasions where ultraviolet (UV) detection has limitations, including cases where analytes ...

I present science goals and mission concepts that require ultraviolet-optical detector development for space-based applications during the next two decades. A broad range of science objectives in NASA’s Astronomical Search for Origins and Structure and Evolution of the Universe themes can be addressed by imaging and spectroscopic studies at UV-optical wavelengths, from detecting and characteriz...

A procedure was selected for the simultaneous extraction and purification of abscisic acid (ABA) and indoleacetic acid (IAA). Unnecessary steps were eliminated and an accumulation of aqueous phase was avoided. The superior performance of diethyl ether (compared to ethyl acetate) for bulk purification and the superior resolution provided by 250 millimeter columns packed with 5-micrometer spheric...

An improved tomographic algorithm in the scheme of Tikhonov-Phillips regularisation method, has been employed for multi-pixel bolometric measurements in order to get as much information as possible while keeping the assumptions to a minimum. The effects of finite detector size have been taken into account with a full three dimensional treatment of the detector geometry. The application of tomog...

Abstract Laser-driven light sources in the extreme ultraviolet range (EUV) enable nanoscopic imaging with unique label-free elemental contrast. However, to fully exploit properties of these new sources, novel detection schemes need be developed. Here, we show a proof-of-concept experiment that superconducting nanowire single-photon detectors (SNSPD) can utilized photon counting laser-driven EUV...