What is it about?
To date, direct observation of the PSHE in the wavelength domain remains unexplored. In this work, we demonstrate both theoretically and experimentally the enhanced PSHE in the wavelength domain via a helical long-period fiber grating (HLPG). The proposed method provides an additional degree of freedom to observe the PSHE, which paves the way for exploiting all fiber-based HLPGs in chiral photonics, chiral sensors, and fine precise measurements.
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Why is it important?
In conclusion, we show both theoretically and experimentally that the PSHE can be equivalently demonstrated in the wavelength domain by using an HLPG, where the OAM-like higher-order radial modes are resonantly excited by selecting a suitable period for the utilized HLPG. The spin-dependent dual-splitting spectra of the HLPGs are observed. This is unlike the PSHEs reported thus far, where a mono-splitting of the light is observed in the spatial or momentum domains. The proposed method provides an additional degree of freedom to study and observe the PSHE, which could find potential applications in precision metrology, chiral sensors, chiral photonics, structure lights, and optical computing as well.
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This page is a summary of: Observation of the enhanced dual-split photonic spin Hall effect in wavelength domain via a helical fiber grating, Frontiers in Human Neuroscience, September 2024, American Institute of Physics,
DOI: 10.1063/5.0225601.
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