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arxiv: 2606.19165 · v1 · pith:ADXEKLMS · submitted 2026-06-17 · physics.optics

High-speed electrically driven liquid-crystal compact optical skyrmion encoder

Yu-Ping Tang , Zhenyu Guo , Ze-Yu Wang , Le Yu , Long-Yang Wang , Nilo Mata-Cervera , Yu Wang , Ning Wang
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Yijie Shen Ling-Ling Ma Yan-Qing Lu
This is my paper

Reviewed by Pith T0 review T1 audit T2 compute T3 formal T4 kernel 2026-06-26 19:56 UTCgrok-4.3pith:ADXEKLMSrecord.jsonopen to challenge →

classification physics.optics
keywords optical skyrmionsliquid crystal devicesPancharatnam-Berry phasetopological opticshigh-speed switchingoptical encodingspin-orbit devices
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The pith

A liquid-crystal device switches optical skyrmions electrically in milliseconds.

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

The paper presents a patterned liquid-crystal device that imprints a fixed Pancharatnam-Berry phase through in-plane orientation while using applied voltage to tune retardance. This combination allows reversible switching between skyrmion and non-skyrmion polarization textures. The measured bidirectional response times reach 1.76 ms and 0.72 ms, supporting an ideal cycling rate near 403 Hz. The work demonstrates image encoding and decoding to show utility for high-speed topological optical information transmission that resists disturbances.

Core claim

The device employs the in-plane orientation of liquid crystals to imprint a fixed Pancharatnam-Berry geometric phase, while an applied voltage rapidly tunes the liquid-crystal retardance, enabling reversible switching between skyrmion and non-skyrmion states with millisecond response times.

What carries the argument

Voltage-tunable retardance in a spin-orbit liquid-crystal device that carries a fixed Pancharatnam-Berry phase imprint from the in-plane orientation pattern.

If this is right

  • The device achieves bidirectional electrical response times of 1.76 ms and 0.72 ms, corresponding to an ideal cycling rate of approximately 403 Hz.
  • The rapid topological refreshing enables demonstrated image encoding and decoding.
  • The platform supports high-speed, refreshable, and disturbance-resistant topological optical information transmission.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • Similar voltage control of retardance could be tested on other fixed phase patterns to generate different topological textures at comparable speeds.
  • Integration with standard liquid-crystal fabrication processes might allow compact arrays of such encoders for parallel optical channels.
  • The asymmetric rise and fall times suggest that driving waveforms could be optimized to approach the 403 Hz rate in practical encoding sequences.

Load-bearing premise

Rapid voltage tuning of liquid-crystal retardance produces reversible, topologically distinct skyrmion versus non-skyrmion states while preserving the fixed Pancharatnam-Berry phase imprint from the in-plane orientation pattern.

What would settle it

An observation that the polarization texture loses its skyrmion topology or fails to return to the prior state after repeated voltage cycles would falsify reversible high-speed switching.

read the original abstract

Optical skyrmions possess topological polarization textures that can maintain topological robustness under external perturbations, making them promising carriers for disturbance-resistant optical information transmission. However, existing optical skyrmion generation schemes mostly rely on static optical elements or fixed nanostructures, making high-speed dynamic switching of the topological state difficult. Here, we propose a high-speed switchable optical skyrmion generator based on a patterned liquid-crystal spin-orbit device. The device employs the in-plane orientation of liquid crystals to imprint a fixed Pancharatnam-Berry geometric phase, while an applied voltage rapidly tunes the liquid-crystal retardance, enabling reversible switching between skyrmion and non-skyrmion states. Experimental results show that the device exhibits millisecond electrical response, with bidirectional response times of 1.76 ms and 0.72 ms, corresponding to an ideal cycling rate of approximately 403 Hz, making it the fastest switchable optical skyrmion generator to date. Furthermore, by exploiting this rapid topological refreshing capability, we demonstrate image encoding and decoding, providing a new liquid-crystal device platform for high-speed, refreshable, and disturbance-resistant topological optical information transmission.

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.

Referee Report

2 major / 1 minor

Summary. The paper presents a liquid-crystal spin-orbit device that imprints a fixed Pancharatnam-Berry geometric phase via in-plane LC orientation while using applied voltage to tune retardance, enabling reversible electrical switching between optical skyrmion and non-skyrmion states. It reports bidirectional electrical response times of 1.76 ms and 0.72 ms (ideal cycling rate ~403 Hz), claims this as the fastest switchable optical skyrmion generator, and demonstrates an image encoding/decoding application for disturbance-resistant topological optical information transmission.

Significance. If the topological skyrmion state is shown to switch reversibly at the reported millisecond timescales, the result would provide a compact, electrically addressable platform for high-speed refreshable skyrmion-based optical encoding. The approach leverages standard LC technology for dynamic control without requiring mechanical or static nanostructure changes, which could impact fields needing robust topological carriers.

major comments (2)
  1. [Results/experimental characterization] Results/experimental characterization section: The bidirectional response times (1.76 ms and 0.72 ms) are characterized as electrical response of the LC device, but the manuscript provides no time-resolved polarization texture measurements (e.g., Stokes parameters or skyrmion number extraction) during the voltage transients. Without this, the central claim that the topological skyrmion state switches at these timescales remains unverified, as the fixed PB phase imprint could persist while the effective skyrmion texture fails to form or relax on the same schedule.
  2. [Abstract and results] Abstract and results: The claim of being 'the fastest switchable optical skyrmion generator to date' at ~403 Hz requires explicit comparison data against prior devices (including their measured switching times and methods), which is not provided; the ideal cycling rate also assumes perfect reversibility without demonstrated error bars or cycle-to-cycle statistics.
minor comments (1)
  1. The manuscript should include error bars on the reported response times and full device characterization (e.g., retardance vs. voltage curves) to support the switching claims.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for the constructive comments, which help clarify the presentation of our results. We address each major comment below.

read point-by-point responses

  1. Referee: [Results/experimental characterization] Results/experimental characterization section: The bidirectional response times (1.76 ms and 0.72 ms) are characterized as electrical response of the LC device, but the manuscript provides no time-resolved polarization texture measurements (e.g., Stokes parameters or skyrmion number extraction) during the voltage transients. Without this, the central claim that the topological skyrmion state switches at these timescales remains unverified, as the fixed PB phase imprint could persist while the effective skyrmion texture fails to form or relax on the same schedule.

    Authors: We agree that direct time-resolved verification of the polarization texture is necessary to confirm the skyrmion state switches on the reported electrical timescales. The response times were obtained from electrical retardance measurements of the LC layer. In the revised manuscript we will add time-resolved Stokes parameter maps and extracted skyrmion numbers acquired during the voltage transients to demonstrate that the topological texture forms and relaxes synchronously with the retardance change. revision: yes

  2. Referee: [Abstract and results] Abstract and results: The claim of being 'the fastest switchable optical skyrmion generator to date' at ~403 Hz requires explicit comparison data against prior devices (including their measured switching times and methods), which is not provided; the ideal cycling rate also assumes perfect reversibility without demonstrated error bars or cycle-to-cycle statistics.

    Authors: We will insert a comparison table in the revised manuscript that lists previously reported switchable optical skyrmion generators together with their measured switching times and driving methods. We will also add error bars on the response-time data and cycle-to-cycle statistics over multiple switching periods to substantiate the ideal cycling rate. revision: yes

Circularity Check

0 steps flagged

No circularity: experimental measurements of device response times

full rationale

This is an experimental device demonstration paper. The central claims consist of measured bidirectional response times (1.76 ms and 0.72 ms) obtained from electrical characterization of the LC device, with no mathematical derivation, first-principles prediction, or model that reduces the reported cycling rate or switching performance to a fitted parameter or self-citation by construction. The device description (fixed PB phase imprint plus voltage-tuned retardance) is presented as a physical mechanism, not as a self-referential definition. No load-bearing self-citation chain or ansatz smuggling is present in the reported results.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Only the abstract is available; no equations, parameter tables, or detailed methods are provided, so the ledger cannot be populated beyond noting the absence of information.

pith-pipeline@v0.9.1-grok · 5766 in / 1178 out tokens · 15043 ms · 2026-06-26T19:56:03.857966+00:00 · methodology

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Reference graph

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