arxiv: 2605.10283 · v1 · submitted 2026-05-11 · ⚛️ physics.optics

Recognition: no theorem link

Dynamically Reconfigurable Optical Skyrmions Enabled by a Silicon Microring Optical Phased Array for Robust Free-Space Communication

Jian Dai, Kun Xu, Qi Chen, Tian Zhang, Zheng Wang, Zili Cai

Pith reviewed 2026-05-12 05:00 UTC · model grok-4.3

classification ⚛️ physics.optics

keywords optical skyrmionssilicon photonicsoptical phased arrayfree-space communicationtopological opticsKolmogorov turbulencemicroring resonatorspolarization control

0 comments

The pith

A silicon microring phased array generates dynamically reconfigurable optical skyrmions that maintain lower error rates than OAM beams under Kolmogorov turbulence.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

This paper presents a compact silicon platform that creates and switches optical skyrmions on demand for free-space data links. The device uses integrated microring emitters to control polarization and phase, allowing transitions between Néel-type and Bloch-type skyrmions and adjustment of their topological numbers. In a 4-symbol communication test, the skyrmion signals keep lower symbol error rates across a wider turbulence range than standard Laguerre-Gaussian orbital angular momentum encoding. The work shows that vectorial topological features can serve as more stable information carriers in atmospheric channels.

Core claim

The silicon microring-resonator optical phased array integrates spin-selective emission and programmable phase control on a single chip. Optimized inner- and outer-grating microring emitters provide decoupled LCP and RCP radiation bases with polarization fractions of 90.27% and 91.40%, enabling active switching between Néel-type and Bloch-type skyrmions while dynamically tuning the skyrmion number across Nsk = -1.914 to 1.918. Using these programmable topological states, a 4-symbol free-space communication link is constructed and compared with ideal LG-OAM encoding under Kolmogorov turbulence. The skyrmion-encoded link maintains a lower symbol error rate over a broader turbulence range, and

What carries the argument

Silicon microring optical phased array with inner- and outer-grating emitters that decouple left- and right-circularly polarized radiation bases to allow independent phase programming and active skyrmion reconfiguration.

Load-bearing premise

The polarization purity and phase control values obtained in simulation will hold in a fabricated device operating under real atmospheric turbulence.

What would settle it

Fabrication of the microring array followed by direct measurement of skyrmion number and polarization purity under controlled turbulence, or a communication test in which skyrmion symbol error rate exceeds that of OAM at some turbulence strength.

read the original abstract

Optical skyrmions offer a robust vectorial information degree of freedom for free-space communication, but practical deployment requires a compact platform capable of active topological reconfiguration. Here, we propose a silicon microring-resonator optical phased array that integrates spin-selective emission and programmable phase control on a single chip. Optimized inner- and outer-grating microring emitters provide decoupled LCP and RCP radiation bases with polarization fractions of 90.27% and 91.40%, enabling active switching between N\'eel-type and Bloch-type skyrmions, while dynamically tuning the skyrmion number across Nsk =-1.914 to 1.918. Using these programmable topological states, a 4-symbol free-space communication link is constructed and compared with ideal LG-OAM encoding under Kolmogorov turbulence. The skyrmion-encoded link maintains a lower symbol error rate over a broader turbulence range, demonstrating that topological observables are more robust than scalar OAM modes. These results establish actively reconfigurable optical skyrmions as compact, programmable, and turbulence-tolerant information carriers for next-generation free-space optical communication.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Desk Editor's Note private letter to a colleague

This is a simulation study of a silicon microring OPA for switching skyrmion types and numbers, with modeled turbulence robustness over OAM, but no fabricated device or measurements.

read the letter

The main point is a proposed silicon photonic chip that uses microring resonators with inner and outer gratings to emit high-purity circular polarizations, then applies phase control across the array to switch between Néel and Bloch skyrmions and tune the skyrmion number from roughly -1.9 to 1.9. They run a simple 4-symbol free-space link through Kolmogorov turbulence screens and report lower symbol error rates than ideal Laguerre-Gaussian OAM modes. The polarization fractions hit about 90% in the simulations, which is respectable for the model. The device layout and the way they decouple the spin bases look like a practical step toward on-chip control of these vectorial states. The turbulence comparison itself is straightforward and uses a standard independent model, so the relative advantage shows up cleanly in the numbers they present. What is actually new is the specific integration of those spin-selective emitters with a programmable phased array for dynamic topological reconfiguration, which does not appear in the prior work they cite. The paper does a decent job laying out the emitter design, the field calculations, and the propagation results without obvious internal contradictions. The soft spots are clear and central: everything stays in simulation. There is no fabricated device, no measured far-field data, no tolerance study for silicon fabrication variations, and no check on how real phase noise or polarization leakage would affect the skyrmion stability. The robustness claim therefore rests on idealized emitter fields and perfect control; modest drops in those parameters could erase the reported advantage. This is aimed at the integrated photonics and free-space optical communications groups. A reader working on new encoding schemes or topological light for links would get a concrete architecture and sim evidence to consider. It shows enough honest engagement with the literature and a clear comparison to deserve serious referee time, even though experimental validation is missing. I would send it for peer review and expect the referees to focus on the simulation assumptions and fabrication realism.

Referee Report

1 major / 2 minor

Summary. The paper proposes a silicon microring-resonator optical phased array that integrates spin-selective emission and programmable phase control to generate dynamically reconfigurable optical skyrmions. Optimized grating emitters achieve LCP and RCP polarization fractions of 90.27% and 91.40%, enabling switching between Néel- and Bloch-type skyrmions with skyrmion number tunable from Nsk = -1.914 to 1.918. A 4-symbol free-space communication link is constructed using these states and compared via numerical propagation to ideal LG-OAM encoding under Kolmogorov turbulence, showing lower symbol error rates over a broader turbulence range and claiming greater robustness for topological observables.

Significance. If the simulation results hold under realistic conditions, the work would provide a compact, silicon-compatible platform for actively reconfigurable skyrmion sources, advancing free-space optical communication by exploiting topological robustness to turbulence. The specific polarization fractions and Nsk tuning range represent concrete engineering progress toward integrable topological photonics devices.

major comments (1)

[Abstract] Abstract (and the section describing the 4-symbol communication link): The central claim that skyrmion encoding maintains lower SER over a broader turbulence range than LG-OAM rests on idealized emitter fields with the stated 90.27%/91.40% polarization fractions and perfect phase control; no sensitivity analysis or tolerance study is provided for how modest reductions in polarization purity or phase accuracy (expected in fabricated silicon devices) would erode this advantage.

minor comments (2)

The distinction between Néel-type and Bloch-type skyrmions and the precise definition of Nsk should be briefly recalled or referenced in the main text for readers outside the subfield.
All parameters of the Kolmogorov phase-screen model and the far-field propagation simulation should be explicitly tabulated to support reproducibility of the SER comparison.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for the detailed and constructive review. The single major comment identifies a valid gap in our presentation of the communication-link results. We will incorporate a sensitivity analysis in the revised manuscript to quantify how the reported advantage holds under realistic deviations from the idealized emitter fields.

read point-by-point responses

Referee: [Abstract] Abstract (and the section describing the 4-symbol communication link): The central claim that skyrmion encoding maintains lower SER over a broader turbulence range than LG-OAM rests on idealized emitter fields with the stated 90.27%/91.40% polarization fractions and perfect phase control; no sensitivity analysis or tolerance study is provided for how modest reductions in polarization purity or phase accuracy (expected in fabricated silicon devices) would erode this advantage.

Authors: We agree that the central claim relies on the optimized polarization fractions and ideal phase control obtained from our grating-emitter design. To address this, the revised manuscript will add a dedicated subsection (and corresponding figures) that performs a parametric tolerance study. Specifically, we will (i) vary the LCP/RCP polarization purity independently from 80 % to 95 % while keeping the total radiated power fixed, (ii) introduce random phase errors uniformly distributed between ±5° and ±15° across the 8-element phased array, and (iii) recompute the propagated fields and symbol-error-rate curves under the same Kolmogorov turbulence ensemble. The results will be presented as families of SER-versus-Cn² curves, allowing direct comparison with the ideal case and with LG-OAM. This analysis will clarify the fabrication tolerances required to retain the reported robustness advantage. Because the study is purely numerical and uses the same propagation model already validated in the manuscript, it can be completed without new experimental data. revision: yes

Circularity Check

0 steps flagged

No significant circularity; turbulence comparison uses independent Kolmogorov model on simulated fields

full rationale

The derivation proceeds from device design (microring OPA with optimized gratings) to reported polarization fractions (90.27%/91.40%) and Nsk tuning (-1.914 to 1.918) obtained via simulation, then to numerical propagation of those states through an external Kolmogorov phase-screen model for SER comparison against ideal LG-OAM. No equation or result reduces by construction to a fitted parameter, self-definition, or self-citation chain; the Kolmogorov turbulence is a standard external benchmark independent of the skyrmion generation method. The central claim is therefore a genuine numerical prediction rather than a tautology.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

The central claim rests on standard electromagnetic and turbulence modeling assumptions plus the unverified performance of the proposed microring design; no free parameters or new entities are explicitly introduced in the abstract.

axioms (1)

domain assumption Kolmogorov turbulence spectrum accurately models atmospheric distortions for the simulated link
Invoked when comparing skyrmion and OAM symbol error rates.

pith-pipeline@v0.9.0 · 5506 in / 1291 out tokens · 67164 ms · 2026-05-12T05:00:39.114612+00:00 · methodology

discussion (0)

Reference graph

Works this paper leans on

32 extracted references · 32 canonical work pages

[1]

Industry insight: photonics to scale AI data centers,

L. Torrijos -Morá n and D. Pé rez-Ló pez, "Industry insight: photonics to scale AI data centers," npj Nanophotonics, vol. 3, no. 1, pp. 8, 2026

work page 2026
[2]

Optical microcombs for ultrahigh-bandwidth communications,

B. Corcoran, A. Mitchell, R. Morandotti, L. K. Oxenlø we, and D. J. Moss, "Optical microcombs for ultrahigh-bandwidth communications," Nature Photonics, vol. 19, no. 5, pp. 451-462, 2025

work page 2025
[3]

Silicon photonics for high -speed communications and photonic signal processing,

X. Zhou, D. Yi, D. W. U. Chan, and H. K. Tsang, "Silicon photonics for high -speed communications and photonic signal processing," npj Nanophotonics, vol. 1, no. 1, pp. 27, 2024

work page 2024
[4]

Compensation -free high -dimensional free-space optical communication using turbulence - resilient vector beams,

Z. Zhu et al. , "Compensation -free high -dimensional free-space optical communication using turbulence - resilient vector beams," Nature Communications, vol. 12, no. 1, pp. 1666, 2021

work page 2021
[5]

High -performance 100 Gbps free - space optical communication via optical pin beam receiver,

M. Guan et al. , "High -performance 100 Gbps free - space optical communication via optical pin beam receiver," Communications Engineering, vol. 4, no. 1, pp. 203, 2025

work page 2025
[6]

Orbital angular momentum and beyond in free-space optical communications,

J. Wang, J. Liu, S. Li, Y. Zhao, J. Du, and L. Zhu, "Orbital angular momentum and beyond in free-space optical communications," Nanophotonics, vol. 11, no. 4, pp. 645-680, 2022

work page 2022
[7]

Orbital angular momentum of light for communications,

A. E. Willner, K. Pang, H. Song, K. Zou, and H. Zhou, "Orbital angular momentum of light for communications," Applied Physics Reviews, vol. 8, no. 4, pp. 041312, 2021

work page 2021
[8]

High -capacity free -space optical communications using wavelength - and mode - division-multiplexing in the mid -infrared region,

K. Zou et al. , "High -capacity free -space optical communications using wavelength - and mode - division-multiplexing in the mid -infrared region," Nature Communications, vol. 13, no. 1, pp. 7662, 2022

work page 2022
[9]

Atmospheric Turbulence Effects on the Performance of Orbital Angular Momentum Multiplexed Free -Space Optical Links Using Coherent Beam Combining,

P. Ju et al., "Atmospheric Turbulence Effects on the Performance of Orbital Angular Momentum Multiplexed Free -Space Optical Links Using Coherent Beam Combining," Photonics, vol. 10, no. 6, pp. 634, 2023

work page 2023
[10]

Optical skyrmions and other topological quasiparticles of light,

Y. Shen, Q. Zhang, P. Shi, L. Du, X. Yuan, and A. V. Zayats, "Optical skyrmions and other topological quasiparticles of light," Nature Photonics, vol. 18, no. 1, pp. 15-25, 2024

work page 2024
[11]

Topological protection of optical skyrmions through complex media,

A. A. Wang et al., "Topological protection of optical skyrmions through complex media," Light: Science & Applications, vol. 13, no. 1, pp. 314, 2024

work page 2024
[12]

Optical skyrmion lattice in evanescent electromagnetic fields,

S. Tsesses, E. Ostrovsky, K. Cohen, B. Gjonaj, N. H. Lindner, and G. Bartal, "Optical skyrmion lattice in evanescent electromagnetic fields," Science, vol. 361, no. 6406, pp. 993-996, 2018

work page 2018
[13]

Deep - subwavelength features of photonic skyrmions in a confined electromagnetic field with orbital angular momentum,

L. Du, A. Yang, A. V. Zayats, and X. Yuan, "Deep - subwavelength features of photonic skyrmions in a confined electromagnetic field with orbital angular momentum," Nature Physics, vol. 15, no. 7, pp. 650 - 654, 2019

work page 2019
[14]

Theory of paraxial optical skyrmions,

Z. Ye et al., "Theory of paraxial optical skyrmions," Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol. 480, no. 2297, 2024

work page 2024
[15]

Microcavity-based generation of full Poincaré beams with arbitrary skyrmion numbers,

W. Lin, Y. Ota, Y. Arakawa, and S. Iwamoto, "Microcavity-based generation of full Poincaré beams with arbitrary skyrmion numbers," Physical Review Research, vol. 3, no. 2, pp. 023055, 2021

work page 2021
[16]

Topological Approach of Characterizing Optical Skyrmions and Multi - Skyrmions,

A. McWilliam et al. , "Topological Approach of Characterizing Optical Skyrmions and Multi - Skyrmions," Laser & Photonics Reviews, vol. 17, no. 9, pp. 2300155, 2023

work page 2023
[17]

Optical skyrmions from metafibers with subwavelength features,

T. He et al., "Optical skyrmions from metafibers with subwavelength features," Nature Communications, vol. 15, no. 1, pp. 10141, 2024

work page 2024
[18]

Topological state and number transitions of optical skyrmions upon free -space beam propagation,

X. Fan et al. , "Topological state and number transitions of optical skyrmions upon free -space beam propagation," Communications Physics, vol. 8, no. 1, pp. 500, 2025

work page 2025
[19]

Spin -Manipulated Photonic Skyrmion-Pair for Pico -Metric Displacement Sensing,

A. Yang et al. , "Spin -Manipulated Photonic Skyrmion-Pair for Pico -Metric Displacement Sensing," Advanced Science, vol. 10, no. 12, pp. 2205249, 2023

work page 2023
[20]

Generation of Optical Skyrmions with Tunable Topological Textures,

Y. Shen, E. C. Martí nez, and C. Rosales -Guzmá n, "Generation of Optical Skyrmions with Tunable Topological Textures," ACS Photonics, vol. 9, no. 1, pp. 296-303, 2022. > REPLACE THIS LINE WITH YOUR MANUSCRIPT ID NUMBER (DOUBLE -CLICK HERE TO EDIT) <

work page 2022
[21]

Selective formation of generalized optical skyrmions,

H. Zhang, C. Gao, and S. Fu, "Selective formation of generalized optical skyrmions," Optics Letters, vol. 50, no. 9, pp. 2840-2843, 2025

work page 2025
[22]

Reconfiguring optical skyrmion topology in free space,

W. Zhen et al. , "Reconfiguring optical skyrmion topology in free space," Optica, vol. 13, no. 2, pp. 188-194, 2026

work page 2026
[23]

Q -Plates: From Optical Vortices to Optical Skyrmions,

V. Hakobyan and E. Brasselet, "Q -Plates: From Optical Vortices to Optical Skyrmions," Physical Review Letters, vol. 134, no. 8, pp. 083802, 2025

work page 2025
[24]

Generation of Optical Quasiparticles with Spin – Orbit Conversion in a Single Q -Plate,

J. Geng, S. R. Allam, Q. Sheng, and T. Omatsu, "Generation of Optical Quasiparticles with Spin – Orbit Conversion in a Single Q -Plate," Laser & Photonics Reviews, vol. n/a, no. n/a, pp. e02439, 2025

work page 2025
[25]

Tailoring propagation - invariant topology of optical skyrmions with dielectric metasurfaces,

N. Mata -Cervera et al. , "Tailoring propagation - invariant topology of optical skyrmions with dielectric metasurfaces," Nanophotonics, vol. 14, no. 23, pp. 4069-4077, 2025

work page 2025
[26]

The longitudinal dynamics evolution of optical skyrmions via meta-optics,

T. He et al. , "The longitudinal dynamics evolution of optical skyrmions via meta-optics," Nanophotonics, vol. 14, no. 24, pp. 4365-4376, 2025

work page 2025
[27]

Nanophotonic chip -space interfaces for multidimensional nonlinear optics,

D. Wei et al. , "Nanophotonic chip -space interfaces for multidimensional nonlinear optics," Nature Materials, 2026

work page 2026
[28]

Programmable skyrmions for communication and sensing,

L. Chen et al. , "Programmable skyrmions for communication and sensing," Nature Electronics, 2026

work page 2026
[29]

On - chip optical skyrmionic beam generators,

W. Lin, Y. Ota, Y. Arakawa, and S. Iwamoto, "On - chip optical skyrmionic beam generators," Optica, vol. 11, no. 11, pp. 1588-1594, 2024

work page 2024
[30]

Photonic Spin Lattices: Symmetry Constraints for Skyrmion and Meron Topologies,

X. Lei et al. , "Photonic Spin Lattices: Symmetry Constraints for Skyrmion and Meron Topologies," Physical Review Letters, vol. 127, no. 23, pp. 237403, 2021

work page 2021
[31]

Integrated Compact Optical Vortex Beam Emitters,

X. Cai et al. , "Integrated Compact Optical Vortex Beam Emitters," Science, vol. 338, pp. 363, 2012

work page 2012
[32]

Pure circularly polarized light emission from waveguide microring resonators,

L. Massai, T. Schatteburg, J. P. Home, and K. K. Mehta, "Pure circularly polarized light emission from waveguide microring resonators," Applied Physics Letters, vol. 121, no. 12, pp. 121101, 2022

work page 2022