We propose a theoretically lossless pancake optics solution that incorporates a nonreciprocal polarization rotator sandwiched between two reflective polarizers. A proof‐of‐concept experiment using a commercially available Faraday rotator (FR) is implemented. The theoretically predicted 100% efficiency can indeed be achieved approximately by using two high extinction ratio reflective polarizers.
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Ding et al. (2024) studied this question.
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