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Weak value amplification of an optical Faraday differential refraction effect.

Authors
  • Parks, A D
  • Spence, S E
Type
Published Article
Journal
Applied Optics
Publisher
The Optical Society
Publication Date
Jun 01, 2012
Volume
51
Issue
16
Pages
3364–3369
Identifiers
DOI: 10.1364/AO.51.003364
PMID: 22695571
Source
Medline
License
Unknown

Abstract

In the presence of a longitudinal magnetic field B, a beam of linearly polarized light incident from a Faraday medium of Verdet constant V refracts at its interface with a medium of negligible Verdet constant and emerges as two opposite circularly polarized beams that are separated by a small divergence angle δ that is proportional to the product BV. Judicious postselection of the polarization state of the emergent light can be used to amplify the measured value of δ by several orders of magnitude. This technique makes it possible to optically measure either very small V values when B is known or small magnetic fields when V is known.

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