Figure | Conventional Doppler effect versus generalized Doppler effect. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure | Conventional Doppler effect versus generalized Doppler effect.

Caption

Figure | Conventional Doppler effect versus generalized Doppler effect. a, Rotational Doppler effect: phase-conjugated vortex field interacting with a rotational particle. The FFT spectrum shows a single DS peak at |ℓΩ/π|, while the phase spectrum fails to discriminate red/blue shifts. b, Vectorial Doppler effect: vectorially polarized field interacting with the same particle. The FFT spectrum shows a single DPS peak at |mΩ/π|, with red/blue shifts unambiguously resolved in the phase spectrum via linear polarization angle difference. (c), Generalized Doppler effect: VPDVF interaction yields multiple spectral signatures including DS, DPS, and DPVS1, DPVS2, with peaks at |ℓΩ/π|, |mΩ/π|, |(m-ℓ)Ω/π|, |(m+ℓ)Ω/π|, respectively. The red/blue shifts in the phase spectrum are unambiguously resolved via both linear polarization angle difference and initial polarization-angle offset for DPS, DPVS1, DPVS2, whereas the DS component remains directionally indistinguishable.

Credit

Yanxiang Zhang et al.

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