Impurity-Induced Far-Infrared Absorption in KBr and KCl

Far-Infrared Blocked Impurity Band Detector Development

DRS Sensors & Targeting Systems, supported by detector materials supplier Lawrence Semiconductor Research Laboratory, is developing far-infrared detectors jointly with NASA Langley under the Far-IR Detector Technology Advancement Partnership (FIDTAP). The detectors are intended for spectral characterization of the Earth’s energy budget from space. During the first year of this effort we have de...

IMPURITY [NDUCED FAR INFRARED ABSORPTION OF CsI CRYSTALS L.GENZEL, W. PRETTL and E.SIEP

In perfect alkali halide crystals only the transverse optic phonons of zero wave vector absorb far infrared radiation in first order. The introduction of impurities in the lattice removes the translational invariance and almost all phonons become optically active. In addition to the absorption at the reststrahlen frequency, impurity induced absorption appears in the phonon band region and somet...

Far-infrared Absorption by Small Particles

Detailed far-infrared (FIR) and mid-infrared (MIR) studies of aluminum small particles have been carried out. MIR absorption studies of clustered and non-clustered samples suggest that the anomalous FIR absorption does not arise from the clustering together of the individual metallic particles. The MIR absorption, which is too small to be the continuation of the anomalous FIR absorption, could ...

Infrared collision-induced and far-line absorption in dense CO2 atmospheres

0019-1035/$ see front matter 2010 Elsevier Inc. A doi:10.1016/j.icarus.2010.06.010 ⇑ Corresponding author. E-mail address: [email protected] (R. Wordsw Collision-induced absorption is of great importance to the overall radiative budget in dense CO2-rich atmospheres, but its representation in climate models remains uncertain, mainly due to a lack of accurate experimental and theoretical data....

FAR-INFRARED ABSORPTION DUE TO IMPURITIES IN CsBr CRYSTALS