Evidence map›Paper›PMID 41565618›Full record

ArticleLight, science & applications2026

Experimental demonstration of spatiotemporal analog computation in ultrafast optics.

Junyi Huang, Dong Zhao, Jixuan Shi, Hongliang Zhang, Hengyi Wang, Fang-Wen Sun, Qiwen Zhan, Shiyao Zhu, Kun Huang, Zhichao Ruan

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Light, science & applications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Junyi Huang *School of Physics, State Key Laboratory of Extreme Photonics and Instrumentation, and Zhejiang Province Key Laboratory of Quantum Technology and Device, Zhejiang University, Hangzhou, 310027, China.
Dong Zhao *Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, 230026, China.ORCID http://orcid.org/0000-0001-7173-0500
Jixuan Shi *Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, 230026, China.
Hongliang Zhang *School of Physics, State Key Laboratory of Extreme Photonics and Instrumentation, and Zhejiang Province Key Laboratory of Quantum Technology and Device, Zhejiang University, Hangzhou, 310027, China.
Hengyi WangDepartment of Optics and Optical Engineering, University of Science and Technology of China, Hefei, 230026, China.
Fang-Wen SunDepartment of Optics and Optical Engineering, University of Science and Technology of China, Hefei, 230026, China.ORCID http://orcid.org/0000-0002-9625-7390
Qiwen ZhanSchool of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China.ORCID http://orcid.org/0000-0001-8745-4213
Shiyao ZhuSchool of Physics, State Key Laboratory of Extreme Photonics and Instrumentation, and Zhejiang Province Key Laboratory of Quantum Technology and Device, Zhejiang University, Hangzhou, 310027, China.
Kun HuangDepartment of Optics and Optical Engineering, University of Science and Technology of China, Hefei, 230026, China. huangk17@ustc.edu.cn.ORCID http://orcid.org/0000-0002-9391-149X
Zhichao RuanSchool of Physics, State Key Laboratory of Extreme Photonics and Instrumentation, and Zhejiang Province Key Laboratory of Quantum Technology and Device, Zhejiang University, Hangzhou, 310027, China. zhichao@zju.edu.cn.ORCID http://orcid.org/0000-0001-8311-6970

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

It is intractable to perform information processing and computation on single ultrafast optical pulses, within picoseconds or even femtoseconds. Here, we experimentally demonstrate an optical spatiotemporal differentiator, a mirror-symmetry-breaking dielectric metagrating, which performs analog computations of both spatial and temporal differentiations on single ultrafast optical wavepackets. The spatiotemporal differentiator is designed with a transfer function with linear dependence on spatial wavevector and temporal frequency and fabricated by using a double-exposure E-beam lithography process. We achieve the first-order spatiotemporal differentiation with experimental resolutions of approximately 14 μm (in space) and 260 fs (in time). Furthermore, we report a parabolic relationship between the transverse velocity of a front-tilted photonic wavepacket and the normalized intensity of its first-order spatiotemporal-differentiation wavepacket. This relationship allows direct measurement of the transverse velocity using only the normalized intensity, fundamentally simplifying velocity detection. These capabilities of optical spatiotemporal computation endow emerging space-time optics with fundamental computation blocks.

Identifiers

PMID41565618
PMCPMC12824168

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.