Famous 'Aspect Experiment' -- Which Type of Polarizers Were Used?

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Discussion Overview

The discussion centers around the type of polarizers used in the famous Aspect experiment conducted in 1982, exploring the specifics of the polarizing materials and their configurations. Participants are seeking clarity on whether the polarizers were crystal types such as Calcite or Nicol, or other forms.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about the specific type of polarizers used in the Aspect experiment, suggesting they might be crystal polarizers.
  • Another participant mentions using two-channel polarizers in a related experiment, describing them as polarizing cubes with dielectric layers, and speculates that the polarizers in Aspect's experiment could also be calcite.
  • The same participant notes that Nicol prisms are made of calcite but points out that Aspect referred to Wollaston's prisms in his theoretical framework, which adds ambiguity to the discussion.
  • A later reply indicates an intention to contact researchers for further clarification on the polarizers used, referencing a thesis that contains details but lacks specific material information.

Areas of Agreement / Disagreement

Participants express uncertainty regarding the exact type of polarizers used in the Aspect experiment, with multiple competing views on whether they were Calcite, Nicol, or another type. The discussion remains unresolved.

Contextual Notes

There are limitations in the available information, including missing assumptions about the polarizers and the lack of definitive material specifications in referenced documents.

d_bar_x
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TL;DR
Which type of polarizers were used?
Does anyone know exactly which kind of polarizers were used in the famous Aspect experiment from 1982? I've read they were crystal polarizers. Does that mean Calcite, or Nicol, or something else?

[Reference link added by the Mentors:]

https://en.wikipedia.org/wiki/Aspect's_experiment
 
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With the use of two-channel polarizers, we have performed an experiment following much more closely the ideal scheme of Figure 1. Our polarizers were polarizing cubes with dielectric layers transmitting one polarization and reflecting the orthogonal one.††

††A similar experiment, using calcite two channel polarizers, had been considered at the University of Catania
from https://arxiv.org/abs/quant-ph/0402001 it is a bit ambiguous, but I would guess calcite too.

Edit: Note that Nicol prisms are made of calcite too, but in Aspect's habilitation, he refers to Wollaston's prisms (unfortunately only in theoretical framework and not the experimental one). In diagrams of the experiments the polarizers look very cubical, definitely not Nicol.
 
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Thanks. I'll try to contact one of those researchers to find out which polarizers.
d_bar_x
 
d_bar_x said:
Thanks. I'll try to contact one of those researchers to find out which polarizers.
d_bar_x
In the thesis (unfortunately in French) there are several details of the polarizers and optical commutators, however no mention of the material.
 

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