Recent developments in low temperature infrared detectors

Abstract

this paper indicates the state of progress of advanced infrared detection arrays in the world. This presentation is focused on high-performance cooled detectors i.e. CdHgTe photovoltaic arrays (which are more particularly emphasized), InSb detectors, PtSi Schottky barrier diode arrays, extrinsic silicon photoconductors and 111-V multi-quantum well detectors. It is shown that interest may be focused on parameters other than the intrinsic detector performance alone. Future trends concerning the technologies are briefly presented. A more detailed description of the CEA-LETI-Laboratoire Infrarouge (LIR) and SOFRADIR technology is given.

New Technologies in Electron Spin Resonance

“…Similarly low values were obtained by Lebedev (85) at 150 GHz using microwave technology. We found that in homodyne operation, hot electron bolometers perform significantly better as detectors than Schottky diode detectors (94,95), especially when the background power can be suppressed, as in the shunt resonator discussed below, but their responses are too slow for pulse experiments.…”

Ternary Nanoclusters of CuHgS, CuHgSe, and CuInS

“…A general molecular synthetic route to access ternary nanoclusters is desirable since ternary materials find widespread applications in optical and electronic devices. For example Hg 1-x Cd x Te (x ) 0-1) has been used in IR detection 7 and CuInS 2 (E g ) 1.5 eV) semiconducting thin films display desirable properties for use in solar cells applications. 8 We communicated recently 9 that tris(tripropylphosphine)copper (trimethylsilyl thiolate), (Pr 3 P) 3 Cu-SSiMe 3 , may be used as a soluble source of "copper thiolate", "CuS -", in the formation of a mercury-copper-sulfide cluster.…”

“…A general molecular synthetic route to access ternary nanoclusters is desirable since ternary materials find widespread applications in optical and electronic devices. For example Hg 1 - x Cd x Te ( x = 0−1) has been used in IR detection and CuInS 2 ( E g = 1.5 eV) semiconducting thin films display desirable properties for use in solar cells applications …”