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

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The polarizers used in the famous Aspect experiment of 1982 were identified as polarizing cubes with dielectric layers, which transmit one polarization while reflecting the orthogonal one. Although there is ambiguity regarding the exact type, it is suggested that calcite polarizers were likely used, as Nicol prisms are also made of calcite but were not the type employed in the experiment. The discussion references Wollaston's prisms in a theoretical context, but the experimental setup indicates a preference for cubical polarizers. Further investigation into the original research is recommended for definitive identification.

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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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