Plasmon 3D Electron Tomography and Local Electric-Field Enhancement of Engineered Plasmonic Nanoantennas

Archanjo, B. S.; Vasconcelos, T. L.; Oliveira, B. S.; Song, C.; Allen, F. I.; Achete, C. A.; Ercius, P.

doi:10.1021/acsphotonics.8b00125

Title: Plasmon 3D Electron Tomography and Local Electric-Field Enhancement of Engineered Plasmonic Nanoantennas

Abstract

Plasmonic nano-antennas are pushing the limits of optical imaging resolution capabilities in near-field scanning optical microscopy (NSOM). Accordingly, these techniques are driving the basic understanding of photonic and optoelectronic nanoscale devices with applications in sensing, energy conversion, solid-state lighting and information technology. Imaging the localized surface plasmon resonance (LSPR) at the nanoscale is a key to understanding the optical responses of a given tip geometry in order to engineer better plasmonic nano-antennas for near-field experiments. In recent years the advancement of focused ion beam technology provides the ability to directly modify plasmonic structures with nanometer resolution. Also, scanning transmission electron microscopy (STEM) with electron energy loss spectroscopy (EELS) is an established technique allowing imaging of LSPR. Specifically, the combination of these two techniques provides spectrally sensitive two-dimensional (2D) imaging information to better visualize and understand LSPR on the nanometer scale. This can be combined with electron tomography to provide the three-dimensional LSPR distribution. Here in this paper we demonstrate the fabrication of Au nano-pyramids using helium ion microscopy, and analyze the LSPR in 3D reconstructions produced by total variation (TV)-norm minimization of a set of 2D STEM-EELS maps. Additionally, a boundary element simulation method was used to verify the experimentallymore »« less

Authors:

^[1]; Vasconcelos, T. L. ^[2]; Oliveira, B. S. ^[2]; Song, C. ^[3]; Allen, F. I. ^[4]; Achete, C. A. ^[2]; Ercius, P. ^[3]

National Inst. of Metrology, Quality and Technology (INMETRO), RJ (Brazil). Inst. Nacional de Metrologia, Divisao de Metrologia de Materiais; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Center for Electron Microscopy, Molecular Foundry
National Inst. of Metrology, Quality and Technology (INMETRO), RJ (Brazil). Inst. Nacional de Metrologia, Divisao de Metrologia de Materiais
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Center for Electron Microscopy, Molecular Foundry
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Center for Electron Microscopy, Molecular Foundry; Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Engineering

Publication Date:: 2018-05-21

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1456994

Grant/Contract Number:: AC02-05CH11231

Resource Type:: Accepted Manuscript

Journal Name:: ACS Photonics

Additional Journal Information:: Journal Volume: 5; Journal Issue: 7; Journal ID: ISSN 2330-4022

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: English

Subject:: 77 NANOSCIENCE AND NANOTECHNOLOGY; EELS; nanoantennas; nanofabrication; NSOM; surface plasmon; tomography

Citation Formats


                    Archanjo, B. S., Vasconcelos, T. L., Oliveira, B. S., Song, C., Allen, F. I., Achete, C. A., and Ercius, P. Plasmon 3D Electron Tomography and Local Electric-Field Enhancement of Engineered Plasmonic Nanoantennas.  United States: N. p., 2018. 
Web.  doi:10.1021/acsphotonics.8b00125.

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                    Archanjo, B. S., Vasconcelos, T. L., Oliveira, B. S., Song, C., Allen, F. I., Achete, C. A., & Ercius, P. Plasmon 3D Electron Tomography and Local Electric-Field Enhancement of Engineered Plasmonic Nanoantennas.  United States.  https://doi.org/10.1021/acsphotonics.8b00125

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                    Archanjo, B. S., Vasconcelos, T. L., Oliveira, B. S., Song, C., Allen, F. I., Achete, C. A., and Ercius, P. Mon .  
"Plasmon 3D Electron Tomography and Local Electric-Field Enhancement of Engineered Plasmonic Nanoantennas".  United States.  https://doi.org/10.1021/acsphotonics.8b00125.  https://www.osti.gov/servlets/purl/1456994.

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@article{osti_1456994,

  title        = {Plasmon 3D Electron Tomography and Local Electric-Field Enhancement of Engineered Plasmonic Nanoantennas},

  author       = {Archanjo, B. S. and Vasconcelos, T. L. and Oliveira, B. S. and Song, C. and Allen, F. I. and Achete, C. A. and Ercius, P.},

  abstractNote = {Plasmonic nano-antennas are pushing the limits of optical imaging resolution capabilities in near-field scanning optical microscopy (NSOM). Accordingly, these techniques are driving the basic understanding of photonic and optoelectronic nanoscale devices with applications in sensing, energy conversion, solid-state lighting and information technology. Imaging the localized surface plasmon resonance (LSPR) at the nanoscale is a key to understanding the optical responses of a given tip geometry in order to engineer better plasmonic nano-antennas for near-field experiments. In recent years the advancement of focused ion beam technology provides the ability to directly modify plasmonic structures with nanometer resolution. Also, scanning transmission electron microscopy (STEM) with electron energy loss spectroscopy (EELS) is an established technique allowing imaging of LSPR. Specifically, the combination of these two techniques provides spectrally sensitive two-dimensional (2D) imaging information to better visualize and understand LSPR on the nanometer scale. This can be combined with electron tomography to provide the three-dimensional LSPR distribution. Here in this paper we demonstrate the fabrication of Au nano-pyramids using helium ion microscopy, and analyze the LSPR in 3D reconstructions produced by total variation (TV)-norm minimization of a set of 2D STEM-EELS maps. Additionally, a boundary element simulation method was used to verify the experimentally observed nanopyramid LSPR modes. Finally, we show that the point-spread-functions (PSF) of LSPR mode hot spots in nanopyramids differ to local electric-field enhancement under optical excitation making direct comparison to NSOM experimental resolution difficult. Furthermore, the STEM-EELS results show how LSPR modes are influenced by the tip characteristics, which can inform the development of new nano-antenna designs.},

  doi          = {10.1021/acsphotonics.8b00125},

  journal      = {ACS Photonics},

  number       = 7,

  volume       = 5,

  place        = {United States},

  year         = {2018},

  month        = {5}

}

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Fig. 1: STEM–EELS spectrum imaging and MNPBEM simulation of a gold nanopyramid. (a) HIM image of the gold nanopyramid. (b) Experimental and simulated EELS spectra from the apex of the gold nanopyramid. (c) Experimental HAADF-STEM image (left). Surface mesh used in MNPBEM simulation (right). (d) Experimental and simulated EELS mapsmore »

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