ArticleLight, science & applications2026
Generalized Doppler effect for high-accuracy frequency shift measurement.
Article in Light, science & applications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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4 authors.
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Abstract
Laser Doppler effect enables a wide range of precision measurements. However, its traditional implementations, including linear, rotational, and vectorial forms, have historically been treated as isolated phenomena, and meanwhile, their accuracy is fundamentally limited by the achievable frequency shift magnitude due to single controllable parameter. Here, we report a generalized Doppler effect that overcomes these limitations and enhances metrological accuracy. Such effect arises when tailored vectorially polarized dual-vortex fields derived from spin-orbit coupling interact with moving scatterers. In doing so, we observe four simultaneous spectral signatures in a single measurement, including conventional Doppler signal (DS), Doppler polarization signal (DPS), and two novel Doppler polarization-vortex signals (DPVSs). Crucially, the advanced DPVSs with coupled polarization (m) and orbital angular momentum (ℓ), produce amplified frequency shifts that enhance relative measurement accuracy by factors scaling as κ
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