Experimental observation of spin Hall effect of light using compact weak measurements

Author:

Choi Jeonghoon1,Shim Sangmin2,Kim Yeseul3,Tang Peng4ORCID,Li Guoqiang4,Rho Junsuk3567,Lee Dasol2,Kim Minkyung1ORCID

Affiliation:

1. School of Mechanical Engineering , 65419 Gwangju Institute of Science and Technology (GIST) , Gwangju 61005 , Republic of Korea

2. Department of Biomedical Engineering , Yonsei University , Wonju 26493 , Republic of Korea

3. Department of Mechanical Engineering , Pohang University of Science and Technology (POSTECH) , Pohang 37673 , Republic of Korea

4. International Joint Research Laboratory of New Energy Materials and Devices of Henan Province, School of Physics and Electronics , Henan University , Kaifeng 475004 , P.R. China

5. Department of Chemical Engineering , Pohang University of Science and Technology (POSTECH) , Pohang 37673 , Republic of Korea

6. Department of Electrical Engineering , Pohang University of Science and Technology (POSTECH) , Pohang 37673 , Republic of Korea

7. POSCO-POSTECH-RIST Convergence Research Center for Flat Optics and Metaphotonics , Pohang 37673 , Republic of Korea

Abstract

Abstract The spin Hall effect of light, a phenomenon characterized by the transverse and spin dependent splitting of light at an optical interface, is highly promising for collecting precise quantitative data from interfaces and stands as an appealing option for improving precision metrology. This high level of precision is attributed to the principles of weak measurement. Since its conceptual introduction, the spin Hall effect of light has been empirically observed through weak measurement techniques, adhering closely to the initially proposed experimental configuration. Recently, it has been suggested that the setup can be downsized without compromising precision. Here, the first experimental demonstration of “compact weak measurement” is achieved by observing the spin Hall effect of both reflected and refracted light. Compared to the conventional weak measurement, this compact setup performs the same measurements but requires less free space by replacing the two convex lenses with a set of concave and convex lenses. The compact weak measurement demonstrates excellent agreement with theoretical predictions and experimental findings from traditional setups across both isotropic–isotropic and isotropic–anisotropic interfaces. The experimental validation of the compact configuration paves the way for the practical application of the spin Hall effect of light in devices with a smaller form factor.

Funder

National Research Foundation of Korea

Publisher

Walter de Gruyter GmbH

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