Quantum Sensing of Photonic Spin Density Using a Single Spin Qubit

Kalhor, Farid; Yang, Lung‐Jieh; Bauer, Leif; Opondo, Noah; Mahmud, Shoaib; Bhave, Sunil A.; Jacob, Zubin

doi:10.1364/fio.2021.fw1e.1

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…Transverse spin was experimentally demonstrated in structured electromagnetic guided waves, such as surface Bessel beams and Airy beams ( 46 ). The spin was also found in the unpolarized paraxial light ( 47 ), in the evanescent waves ( 48 ), in surface acoustic waves ( 49 ), and using an atomic force microscope tip for the quantum sensing of photonic spin density ( 50 ). A summary of the transverse spin and potential force effects can be found in table S1.…”

Section: Introductionmentioning

confidence: 99%

Stable optical lateral forces from inhomogeneities of the spin angular momentum

et al. 2022

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Transverse spin momentum related to the spin angular momentum (SAM) of light has been theoretically studied recently and predicted to generate an intriguing optical lateral force (OLF). Despite extensive studies, there is no direct experimental evidence of a stable OLF resulting from the dominant SAM rather than the ubiquitous spin-orbit interaction in a single light beam. Here, we theoretically unveil the nontrivial physics of SAM-correlated OLF, showing that the SAM is a dominant factor for the OLF on a nonabsorbing particle, while an additional force from the canonical (orbital) momentum is exhibited on an absorbing particle due to the spin-orbit interaction. Experimental results demonstrate the bidirectional movement of 5-μm-diameter particles on both sides of the beam with opposite spin momenta. The amplitude and sign of this force strongly depend on the polarization. Our optofluidic platform advances the exploitation of exotic forces in systems with a dominant SAM, facilitating the exploration of fascinating light-matter interactions.

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Section: Introductionmentioning

confidence: 99%

Stable optical lateral forces from inhomogeneities of the spin angular momentum

et al. 2022

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Non-classical photonic spin texture of quantum structured light

Yang

Jacob

2021

Commun Phys

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Classical structured light with controlled polarization and orbital angular momentum (OAM) of electromagnetic waves has varied applications in optical trapping, bio-sensing, optical communications and quantum simulations. However, quantum noise and photon statistics of three-dimensional photonic angular momentum are relatively less explored. Here, we develop a quantum framework and put forth the concept of quantum structured light for space-time wavepackets at the single-photon level. Our work deals with three-dimensional angular momentum observables for twisted quantum pulses beyond scalar-field theory as well as the paraxial approximation. We show that the spin density generates modulated helical texture and exhibits distinct photon statistics for Fock-state vs. coherent-state twisted pulses. We introduce the quantum correlator of photon spin density to characterize nonlocal spin noise providing a rigorous parallel with electronic spin noise. Our work can lead to quantum spin-OAM physics in twisted single-photon pulses and opens explorations for phases of light with long-range spin order.

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Quantum Sensing of Photonic Spin Density Using a Single Spin Qubit

Abstract: We demonstrate that a nitrogen-vacancy (NV) center in diamond can be used as a nanoscale quantum sensor for detecting photonic spin density (PSD). This opens a new frontier for studying exotic phases of photons as well as future on-chip applications.

Cited by 2 publications

References 4 publications

Stable optical lateral forces from inhomogeneities of the spin angular momentum

Stable optical lateral forces from inhomogeneities of the spin angular momentum

Non-classical photonic spin texture of quantum structured light

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