Active tailoring of nanoantenna plasmonic fields using few-cycle laser pulses

S. Choi; M. F. Ciappina; J. A. Pérez-Hernández; A. S. Landsman; Y. J. Kim; S. C. Kim; D. Kim

doi:10.1103/PhysRevA.93.021405

Active tailoring of nanoantenna plasmonic fields using few-cycle laser pulses

S. Choi, M. F. Ciappina, J. A. Pérez-Hernández, A. S. Landsman, Y. J. Kim, S. C. Kim, D. Kim

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

9 Scopus citations

Abstract

Plasmonic nanoatennas are a versatile tool for coherently manipulating light on a nanoscale by confining electric fields of the driving laser into subwavelength volumes, thereby significantly enhancing electric near fields. It is normally assumed that the time-dependent spectral properties of these near fields are independent of the duration of the driving laser pulse. Here we show that when a few-cycle laser pulse shines on a bow-tie nanoantenna, its spectral properties are dramatically modified, as evidenced by a large shift of the center wavelength of the near field, relative to the driving laser. In addition, for certain geometries, a second color appears in the near field, creating conditions for generation of an isolated attosecond pulse at megahertz repetition rate. Our results open the door to frequency-tunable ultrafast sources at nanometer scale without tuning the frequency of the driving laser.

Original language	English
Article number	021405
Journal	Physical Review A
Volume	93
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.93.021405
State	Published - 24 Feb 2016
Externally published	Yes

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title = "Active tailoring of nanoantenna plasmonic fields using few-cycle laser pulses",

abstract = "Plasmonic nanoatennas are a versatile tool for coherently manipulating light on a nanoscale by confining electric fields of the driving laser into subwavelength volumes, thereby significantly enhancing electric near fields. It is normally assumed that the time-dependent spectral properties of these near fields are independent of the duration of the driving laser pulse. Here we show that when a few-cycle laser pulse shines on a bow-tie nanoantenna, its spectral properties are dramatically modified, as evidenced by a large shift of the center wavelength of the near field, relative to the driving laser. In addition, for certain geometries, a second color appears in the near field, creating conditions for generation of an isolated attosecond pulse at megahertz repetition rate. Our results open the door to frequency-tunable ultrafast sources at nanometer scale without tuning the frequency of the driving laser.",

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AU - Choi, S.

AU - Ciappina, M. F.

AU - Pérez-Hernández, J. A.

AU - Landsman, A. S.

AU - Kim, Y. J.

AU - Kim, S. C.

AU - Kim, D.

PY - 2016/2/24

Y1 - 2016/2/24

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AB - Plasmonic nanoatennas are a versatile tool for coherently manipulating light on a nanoscale by confining electric fields of the driving laser into subwavelength volumes, thereby significantly enhancing electric near fields. It is normally assumed that the time-dependent spectral properties of these near fields are independent of the duration of the driving laser pulse. Here we show that when a few-cycle laser pulse shines on a bow-tie nanoantenna, its spectral properties are dramatically modified, as evidenced by a large shift of the center wavelength of the near field, relative to the driving laser. In addition, for certain geometries, a second color appears in the near field, creating conditions for generation of an isolated attosecond pulse at megahertz repetition rate. Our results open the door to frequency-tunable ultrafast sources at nanometer scale without tuning the frequency of the driving laser.

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Active tailoring of nanoantenna plasmonic fields using few-cycle laser pulses

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