Near-Field Spectroscopy and Imaging of Subwavelength Plasmonic Terahertz Resonators

Oleg Mitrofanov; Irina Khromova; Thomas Siday; Robert J. Thompson; Andrey N. Ponomarev; Igal Brener; John L. Reno

doi:10.1109/TTHZ.2016.2549367

Near-Field Spectroscopy and Imaging of Subwavelength Plasmonic Terahertz Resonators

Oleg Mitrofanov, Irina Khromova, Thomas Siday, Robert J. Thompson, Andrey N. Ponomarev, Igal Brener, John L. Reno

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We present the temporal evolution of the terahertz (THz) field leading to the excitation of plasmonic resonances in carbon microfibers. The field evolution is mapped in space and time for the 3/2 wavelength resonance using a subwavelength aperture THz near-field probe with an embedded THz photoconductive detector. The excitation of surface waves at the fiber tips leads to the formation of a standing wave along the fiber. Local THz time-domain spectroscopy at one of the standing wave crests shows a clear third-order resonance peak at 1.65 THz, well described by the Lorentz model. This application of the subwavelength aperture THz near-field microscopy for mode mapping and local spectroscopy demonstrates the potential of near-field methods for studies of subwavelength plasmonic THz resonators.

Original language	English
Article number	7458180
Pages (from-to)	382-388
Number of pages	7
Journal	IEEE Transactions on Terahertz Science and Technology
Volume	6
Issue number	3
DOIs	https://doi.org/10.1109/TTHZ.2016.2549367
Publication status	Published - May 2016

Bibliographical note

Publisher Copyright:
© 2016 IEEE.

Keywords

Antennas
aperture
carbon fibers
graphite
near-field microscopy
plasmons
resonators
terahertz (THz)

ASJC Scopus subject areas

Radiation
Electrical and Electronic Engineering

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10.1109/TTHZ.2016.2549367

Cite this

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title = "Near-Field Spectroscopy and Imaging of Subwavelength Plasmonic Terahertz Resonators",

abstract = "We present the temporal evolution of the terahertz (THz) field leading to the excitation of plasmonic resonances in carbon microfibers. The field evolution is mapped in space and time for the 3/2 wavelength resonance using a subwavelength aperture THz near-field probe with an embedded THz photoconductive detector. The excitation of surface waves at the fiber tips leads to the formation of a standing wave along the fiber. Local THz time-domain spectroscopy at one of the standing wave crests shows a clear third-order resonance peak at 1.65 THz, well described by the Lorentz model. This application of the subwavelength aperture THz near-field microscopy for mode mapping and local spectroscopy demonstrates the potential of near-field methods for studies of subwavelength plasmonic THz resonators.",

keywords = "Antennas, aperture, carbon fibers, graphite, near-field microscopy, plasmons, resonators, terahertz (THz)",

author = "Oleg Mitrofanov and Irina Khromova and Thomas Siday and Thompson, {Robert J.} and Ponomarev, {Andrey N.} and Igal Brener and Reno, {John L.}",

note = "Publisher Copyright: {\textcopyright} 2016 IEEE.",

year = "2016",

month = may,

doi = "10.1109/TTHZ.2016.2549367",

language = "English",

volume = "6",

pages = "382--388",

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T1 - Near-Field Spectroscopy and Imaging of Subwavelength Plasmonic Terahertz Resonators

AU - Mitrofanov, Oleg

AU - Khromova, Irina

AU - Siday, Thomas

AU - Thompson, Robert J.

AU - Ponomarev, Andrey N.

AU - Brener, Igal

AU - Reno, John L.

PY - 2016/5

Y1 - 2016/5

N2 - We present the temporal evolution of the terahertz (THz) field leading to the excitation of plasmonic resonances in carbon microfibers. The field evolution is mapped in space and time for the 3/2 wavelength resonance using a subwavelength aperture THz near-field probe with an embedded THz photoconductive detector. The excitation of surface waves at the fiber tips leads to the formation of a standing wave along the fiber. Local THz time-domain spectroscopy at one of the standing wave crests shows a clear third-order resonance peak at 1.65 THz, well described by the Lorentz model. This application of the subwavelength aperture THz near-field microscopy for mode mapping and local spectroscopy demonstrates the potential of near-field methods for studies of subwavelength plasmonic THz resonators.

AB - We present the temporal evolution of the terahertz (THz) field leading to the excitation of plasmonic resonances in carbon microfibers. The field evolution is mapped in space and time for the 3/2 wavelength resonance using a subwavelength aperture THz near-field probe with an embedded THz photoconductive detector. The excitation of surface waves at the fiber tips leads to the formation of a standing wave along the fiber. Local THz time-domain spectroscopy at one of the standing wave crests shows a clear third-order resonance peak at 1.65 THz, well described by the Lorentz model. This application of the subwavelength aperture THz near-field microscopy for mode mapping and local spectroscopy demonstrates the potential of near-field methods for studies of subwavelength plasmonic THz resonators.

KW - Antennas

KW - aperture

KW - carbon fibers

KW - graphite

KW - near-field microscopy

KW - plasmons

KW - resonators

KW - terahertz (THz)

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DO - 10.1109/TTHZ.2016.2549367

M3 - Article

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SN - 2156-342X

VL - 6

SP - 382

EP - 388

JO - IEEE Transactions on Terahertz Science and Technology

JF - IEEE Transactions on Terahertz Science and Technology

IS - 3

M1 - 7458180

ER -

Near-Field Spectroscopy and Imaging of Subwavelength Plasmonic Terahertz Resonators

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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