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Proceedings Paper

Ultralow background radiation far infrared spectroscopy based on the magnetically tunable selective sources, filters and detectors
Author(s): W. Knap
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Paper Abstract

The way how to make spectroscopy in the far infrared by replacing mechanical spectral elements(moving mirrors or gratings) by superconducting solenoids is shown. The magnetic field changes the FIRproperties of the semiconductors through the cyclotron resonance or the Zeeman effect allowing to makespectroscopy in the range 35cm-1 - 160cm-1 with the resolution up to 0.3cm-1. We present the possibilities andlimits of the spectroscopy which uses a magnetic field to scan (tune) the characteristic energies of the narrowband spectral elements: sources, filters and detectors. All described below devices work immersed in theliquid helium bath. Therefore spectroscopy based on magnetically tunable narrow band elements provides alsoultralow background radiation conditions for measurements.

Paper Details

Date Published: 30 August 1993
PDF: 2 pages
Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21042P (30 August 1993); doi: 10.1117/12.2298529
Show Author Affiliations
W. Knap, Univ. Montpellier II (France)

Published in SPIE Proceedings Vol. 2104:
18th International Conference on Infrared and Millimeter Waves
James R. Birch; Terence J. Parker, Editor(s)

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