Improved mid infrared detector for high spectral or spatial resolution and synchrotron radiation use

Journal Article · Wed Jun 15 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4954405· OSTI ID:22597909

Faye, Mbaye; Bordessoule, Michel; Kanouté, Brahim; Brubach, Jean-Blaise; Roy, Pascale ^[1]; Manceron, Laurent ^[1]

---

1. Synchrotron SOLEIL, L’Orme des Merisiers, F-91192 Gif-sur-Yvette (France)

When using bright, small effective size sources, such as synchrotron radiation light beam, for broadband spectroscopy at spectral or spatial high resolution for mid-IR FTIR measurements, a marked detectivity improvement can be achieved by setting up a device matching the detector optical étendue to that of the source. Further improvement can be achieved by reducing the background unmodulated flux and other intrinsic noise sources using a lower temperature cryogen, such as liquid helium. By the combined use of cooled apertures, cold reimaging optics, filters and adapted detector polarization, and preamplification electronics, the sensitivity of a HgCdTe photoconductive IR detector can be improved by a significant factor with respect to standard commercial devices (more than one order of magnitude on average over 6–20 μm region) and the usable spectral range extended to longer wavelengths. The performances of such an optimized detector developed on the AILES Beamline at SOLEIL are presented here.

• OSTI ID: 22597909
• Journal Information: Review of Scientific Instruments, Vol. 87, Issue 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
APERTURES
BEAMS
CRYOGENIC FLUIDS
EQUIPMENT
FILTERS
FOURIER TRANSFORM SPECTROMETERS
HELIUM
INFRARED SPECTRA
LIQUIDS
NOISE
OPTICS
PERFORMANCE
POLARIZATION
SENSITIVITY
SPATIAL RESOLUTION
SPECTROSCOPY
SYNCHROTRON RADIATION
SYNCHROTRONS
WAVELENGTHS