Highly absorbing nano-scale metal films for terahertz applications

The article of record as published may be found at https://doi.org/10.1117/1.OE.51.6.063801Our work aims to identify nano-scale metal films with enhanced absorption in the terahertz (THz) spectral range (1 to 10 THz) that can be incorporated in thermal imagers that operate in this spectral band. Absorption measurements of chromium and nickel films with different thicknesses (2.5 to 50 nm) revealed that absorption as high as 47% can be achieved by controlling the thickness of the film. The measured absorption agrees well with the predicted maximum absorption of 50% using thin metal films. The results indicate that nanometer scale metal films can provide high THz absorption for applications in thermal sensing

Stratospheric Envelopes for an Atmospheric Mode of Address

As a contribution to ongoing research into the affective experiences of atmospheres, this paper speculates about the modes of atmospheric address emerging from experiments within the stratosphere. In order to do so it draws upon archival material associated with Commander Malcolm D. Ross who, during the 1950s and early 1960s, spent more time than any other person in the stratosphere. Coupling accounts of Ross’s experimental ascents with his interest in creative writing and communication, this paper uses three unopened letters carried by Ross into the stratosphere as a point of departure for layering together three strands of thinking. The first is a consideration of the stratosphere as a zone of exchange, experiment and experience. The second is a reflection on the envelope as a spatiotemporal form, a limit, and a lure for thinking. And the third is a discussion of the modes of atmospheric sensing made possible by stratospheric flights. These three strands are worked together in order to develop a distinctive speculative mode of atmospheric address. Such modes of address can contribute to wider efforts across the Geohumanities to account for the differentiated materiality and movement of the earth’s atmosphere

Workstations and software for statistical analysis Some thoughts on environmental concerns

SIGLETIB Hannover: RO 2708(251) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman