Improved IRQC Performance of CdF2 :Er3+ by Generation of C3ν Local-Site Symmetry

15 April 1972

journal article
research article
Published by AIP Publishing in Applied Physics Letters

Vol. 20 (8) , 286-288
https://doi.org/10.1063/1.1654152

Abstract

Selective generation of trigonal (C_3ν) symmetry at Er³⁺ ions in CdF₂ by oxygen firing increases the green (⁴S_3/2→⁴I_15/2) radiative efficiency from 1.9 to 52% while causing qualitative changes in the optical absorption and emission associated with these ions. Measurements of the parameters involved in the operation of an infrared quantum counter suggest that this oxygen‐fired material could be used to construct an uncooled infrared detector having a minimum detectable power of 3.6×10⁻¹⁴ W at 1.53 μm, appreciably better than currently available detectors sensitive at this wavelength.

Keywords

INFRARED

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