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Magnetic-field tailoring of the terahertz polarization emitted from a spintronic source

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Magnetic-field tailoring of the terahertz polarization emitted from a spintronic source. / Hibberd, M. T.; Lake, Daniel; Johansson, N. A. B. et al.
In: Applied Physics Letters, Vol. 114, No. 3, 031101, 21.01.2019.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Hibberd, MT, Lake, D, Johansson, NAB, Thomson, T, Jamison, S & Graham, DM 2019, 'Magnetic-field tailoring of the terahertz polarization emitted from a spintronic source', Applied Physics Letters, vol. 114, no. 3, 031101. https://doi.org/10.1063/1.5055736

APA

Hibberd, M. T., Lake, D., Johansson, N. A. B., Thomson, T., Jamison, S., & Graham, D. M. (2019). Magnetic-field tailoring of the terahertz polarization emitted from a spintronic source. Applied Physics Letters, 114(3), Article 031101. https://doi.org/10.1063/1.5055736

Vancouver

Hibberd MT, Lake D, Johansson NAB, Thomson T, Jamison S, Graham DM. Magnetic-field tailoring of the terahertz polarization emitted from a spintronic source. Applied Physics Letters. 2019 Jan 21;114(3):031101. doi: 10.1063/1.5055736

Author

Hibberd, M. T. ; Lake, Daniel ; Johansson, N. A. B. et al. / Magnetic-field tailoring of the terahertz polarization emitted from a spintronic source. In: Applied Physics Letters. 2019 ; Vol. 114, No. 3.

Bibtex

@article{e71cbc230706402bae53e8bc8106d588,
title = "Magnetic-field tailoring of the terahertz polarization emitted from a spintronic source",
abstract = "We demonstrate a method to create arbitrary terahertz (THz) polarization profiles by exploiting the magnetic field-dependent emission process of a spintronic source. As a proof-of-concept, we show that by applying a specific magnetic field pattern to the source, it is possible to generate a quadrupole-like THz polarization profile. Experimental measurements of the electric field atthe focus of the THz beam revealed a polarity flip in the transverse profile of the quadrupole-like mode with a resulting strong, on-axis longitudinal component of 17.7 kV cm1. This represents an order of magnitude increase in the longitudinal component for the quadrupole-like profile compared to a linear polarization, showing an example of how the magnetic field patterning of a spintronic source can be exploited to obtain desirable THz polarization properties. This unique ability to generate any desired THz polarization profile opens up possibilities for schemes such as rotatable polarization spectroscopy and for efficient mode coupling in various waveguide designs. Furthermore, the strong longitudinal fields that can be generated have applications in areas including intra-subband spectroscopy of semiconductors, non-diffraction limited THz imaging, and particle-beam acceleration.",
author = "Hibberd, {M. T.} and Daniel Lake and Johansson, {N. A. B.} and T. Thomson and Steven Jamison and Graham, {D. M.}",
year = "2019",
month = jan,
day = "21",
doi = "10.1063/1.5055736",
language = "English",
volume = "114",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Inc.",
number = "3",

}

RIS

TY - JOUR

T1 - Magnetic-field tailoring of the terahertz polarization emitted from a spintronic source

AU - Hibberd, M. T.

AU - Lake, Daniel

AU - Johansson, N. A. B.

AU - Thomson, T.

AU - Jamison, Steven

AU - Graham, D. M.

PY - 2019/1/21

Y1 - 2019/1/21

N2 - We demonstrate a method to create arbitrary terahertz (THz) polarization profiles by exploiting the magnetic field-dependent emission process of a spintronic source. As a proof-of-concept, we show that by applying a specific magnetic field pattern to the source, it is possible to generate a quadrupole-like THz polarization profile. Experimental measurements of the electric field atthe focus of the THz beam revealed a polarity flip in the transverse profile of the quadrupole-like mode with a resulting strong, on-axis longitudinal component of 17.7 kV cm1. This represents an order of magnitude increase in the longitudinal component for the quadrupole-like profile compared to a linear polarization, showing an example of how the magnetic field patterning of a spintronic source can be exploited to obtain desirable THz polarization properties. This unique ability to generate any desired THz polarization profile opens up possibilities for schemes such as rotatable polarization spectroscopy and for efficient mode coupling in various waveguide designs. Furthermore, the strong longitudinal fields that can be generated have applications in areas including intra-subband spectroscopy of semiconductors, non-diffraction limited THz imaging, and particle-beam acceleration.

AB - We demonstrate a method to create arbitrary terahertz (THz) polarization profiles by exploiting the magnetic field-dependent emission process of a spintronic source. As a proof-of-concept, we show that by applying a specific magnetic field pattern to the source, it is possible to generate a quadrupole-like THz polarization profile. Experimental measurements of the electric field atthe focus of the THz beam revealed a polarity flip in the transverse profile of the quadrupole-like mode with a resulting strong, on-axis longitudinal component of 17.7 kV cm1. This represents an order of magnitude increase in the longitudinal component for the quadrupole-like profile compared to a linear polarization, showing an example of how the magnetic field patterning of a spintronic source can be exploited to obtain desirable THz polarization properties. This unique ability to generate any desired THz polarization profile opens up possibilities for schemes such as rotatable polarization spectroscopy and for efficient mode coupling in various waveguide designs. Furthermore, the strong longitudinal fields that can be generated have applications in areas including intra-subband spectroscopy of semiconductors, non-diffraction limited THz imaging, and particle-beam acceleration.

U2 - 10.1063/1.5055736

DO - 10.1063/1.5055736

M3 - Journal article

VL - 114

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 3

M1 - 031101

ER -