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Title: Non-invasive low charge electron beam time-of-arrival diagnostic using a plasmonics-enhanced photoconductive antenna

Abstract

The use of a plasmonics-enhanced photoconductive antenna (PCA) optically gated by a near infrared (NIR) pulse enables non-invasive time-of-arrival measurements of a low charge electron beam with respect to the NIR reference, achieving picosecond resolution. The measured signal values show the expected scaling with the beam charge and distance from PCA to the beam axis, as the PCA samples the electric field of the passing electron beam. We operate the device with an NIR spot size much larger than the PCA active-area, resulting in a very simple optical setup and alignment procedure, making the plasmonics-enhanced PCA a preferred alternative to more complex timing diagnostics for applications requiring non-invasive picosecond or sub-picosecond timestamping.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [2];  [1];  [4]
+ Show Author Affiliations
  1. Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy
  2. Univ. of California, Los Angeles, CA (United States). Dept. of Electrical and Computer Engineering
  3. RadiaBeam Technologies, Santa Monica, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. RadiaBeam Technologies, Santa Monica, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of California, Los Angeles, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
OSTI Identifier:
1490453
Grant/Contract Number:  
AC02-76SF00515; SC0009914; PHY-1734215
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 113; Journal Issue: 19; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; terahertz radiation; antennas; particle accelerators; semiconductors; plasmonics; photoconductive materials; electron beams

Citation Formats

Snively, E. C., Yardimci, N. T., Jacobson, B. T., Jarrahi, M., Musumeci, P., and Murokh, A. Non-invasive low charge electron beam time-of-arrival diagnostic using a plasmonics-enhanced photoconductive antenna. United States: N. p., 2018. Web. doi:10.1063/1.5052631.
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Snively, E. C., Yardimci, N. T., Jacobson, B. T., Jarrahi, M., Musumeci, P., & Murokh, A. Non-invasive low charge electron beam time-of-arrival diagnostic using a plasmonics-enhanced photoconductive antenna. United States. https://doi.org/10.1063/1.5052631
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Snively, E. C., Yardimci, N. T., Jacobson, B. T., Jarrahi, M., Musumeci, P., and Murokh, A. Mon . "Non-invasive low charge electron beam time-of-arrival diagnostic using a plasmonics-enhanced photoconductive antenna". United States. https://doi.org/10.1063/1.5052631. https://www.osti.gov/servlets/purl/1490453.
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@article{osti_1490453,
title = {Non-invasive low charge electron beam time-of-arrival diagnostic using a plasmonics-enhanced photoconductive antenna},
author = {Snively, E. C. and Yardimci, N. T. and Jacobson, B. T. and Jarrahi, M. and Musumeci, P. and Murokh, A.},
abstractNote = {The use of a plasmonics-enhanced photoconductive antenna (PCA) optically gated by a near infrared (NIR) pulse enables non-invasive time-of-arrival measurements of a low charge electron beam with respect to the NIR reference, achieving picosecond resolution. The measured signal values show the expected scaling with the beam charge and distance from PCA to the beam axis, as the PCA samples the electric field of the passing electron beam. We operate the device with an NIR spot size much larger than the PCA active-area, resulting in a very simple optical setup and alignment procedure, making the plasmonics-enhanced PCA a preferred alternative to more complex timing diagnostics for applications requiring non-invasive picosecond or sub-picosecond timestamping.},
doi = {10.1063/1.5052631},
journal = {Applied Physics Letters},
number = 19,
volume = 113,
place = {United States},
year = {Mon Nov 05 00:00:00 EST 2018},
month = {Mon Nov 05 00:00:00 EST 2018}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1063/1.5052631
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Cited by: 1 work
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Figures / Tables:

FIG. 1 FIG. 1: (a) Schematic diagram of the plasmonics-enhanced photoconductive antenna (PCA) based on plasmonic nanoantenna arrays. The nanoantennas are deposited on low-temperature-grown GaAs (LT-GaAs). An antireflection coating is used to enhance NIR coupling to the photoconductor, and shadow metals are used to ensure that all the generated photocurrent components havemore » the same polarity. The incident THz electric field must be polarized perpendicular to the shadow metals, as shown by the blue arrow; the NIR electric field should be polarized parallel to the shadow metals, as shown by the red arrow. Scanning electron microscopy (SEM) images of a fabricated plasmonics-enhanced PCA and the plasmonic nanoantennas are shown in (b) and (c), respectively.« less
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