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通过太赫兹压缩和时间标记提高超快电子衍射测量中的时间分辨率。

Improved temporal resolution in ultrafast electron diffraction measurements through THz compression and time-stamping.

作者信息

Othman Mohamed A K, Gabriel Annika E, Snively Emma C, Kozina Michael E, Shen Xiaozhe, Ji Fuhao, Lewis Samantha, Weathersby Stephen, Vasireddy Praful, Luo Duan, Wang Xijie, Hoffmann Matthias C, Nanni Emilio A

机构信息

SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, USA.

出版信息

Struct Dyn. 2024 Apr 22;11(2):024311. doi: 10.1063/4.0000230. eCollection 2024 Mar.

DOI:10.1063/4.0000230
PMID:38655563
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11037933/
Abstract

We present an experimental demonstration of ultrafast electron diffraction (UED) with THz-driven electron bunch compression and time-stamping that enables UED probes with improved temporal resolution. Through THz-driven longitudinal bunch compression, a compression factor of approximately four is achieved. Moreover, the time-of-arrival jitter between the compressed electron bunch and a pump laser pulse is suppressed by a factor of three. Simultaneously, the THz interaction imparts a transverse spatiotemporal correlation on the electron distribution, which we utilize to further enhance the precision of time-resolved UED measurements. We use this technique to probe single-crystal gold nanofilms and reveal transient oscillations in the THz near fields with a temporal resolution down to 50 fs. These oscillations were previously beyond reach in the absence of THz compression and time-stamping.

摘要

我们展示了一种利用太赫兹驱动电子束压缩和时间标记的超快电子衍射（UED）实验演示，该技术能够实现具有更高时间分辨率的UED探测。通过太赫兹驱动的纵向束团压缩，实现了约四倍的压缩因子。此外，压缩后的电子束与泵浦激光脉冲之间的到达时间抖动被抑制了三分之一。同时，太赫兹相互作用在电子分布上赋予了横向时空相关性，我们利用这一特性进一步提高了时间分辨UED测量的精度。我们使用该技术探测单晶金纳米薄膜，并揭示了太赫兹近场中的瞬态振荡，时间分辨率低至50飞秒。在没有太赫兹压缩和时间标记的情况下，这些振荡以前是无法实现的。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/dcaec05ef221/SDTYAE-000011-024311_1-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/3e4593ef15f0/SDTYAE-000011-024311_1-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/93ee10891dd7/SDTYAE-000011-024311_1-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/dfad68e0a275/SDTYAE-000011-024311_1-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/c4c509faf8d1/SDTYAE-000011-024311_1-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/d1bc94836f48/SDTYAE-000011-024311_1-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/e7880741c03a/SDTYAE-000011-024311_1-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/3970c7574f53/SDTYAE-000011-024311_1-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/8bde10152f63/SDTYAE-000011-024311_1-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/07995f86c2a0/SDTYAE-000011-024311_1-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/dcaec05ef221/SDTYAE-000011-024311_1-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/3e4593ef15f0/SDTYAE-000011-024311_1-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/93ee10891dd7/SDTYAE-000011-024311_1-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/dfad68e0a275/SDTYAE-000011-024311_1-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/c4c509faf8d1/SDTYAE-000011-024311_1-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/d1bc94836f48/SDTYAE-000011-024311_1-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/e7880741c03a/SDTYAE-000011-024311_1-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/3970c7574f53/SDTYAE-000011-024311_1-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/8bde10152f63/SDTYAE-000011-024311_1-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/07995f86c2a0/SDTYAE-000011-024311_1-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e0b7/11037933/dcaec05ef221/SDTYAE-000011-024311_1-g010.jpg

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