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Optical physics

Optical physics

Spin in unpolarized light defies conventional picture

21 Dec 2020 Anna Demming
Diagram showing the relationship between spin, field and beam
A beam transformed: Optical transforms like tight focussing and total internal reflection, which gives rise to an evanescent field, can lead to out-of-plane polarization components and transverse spin, even for totally unpolarized input light. (Courtesy: Konstantin Bliokh/Diane Roth)
It’s been almost a century since Wolfgang Pauli mooted the idea of “hidden rotation”: a new qu

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Anna Demming is a science journalist based in Bristol, UK
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