Beaming the second harmonic generation from a double layered bull's eye structure

Fangfang Li; Peng Li; Guoguo Kang

doi:10.1016/j.optcom.2019.02.065

Beaming the second harmonic generation from a double layered bull's eye structure

Fangfang Li, Peng Li, Guoguo Kang^*

^*Corresponding author for this work

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

Abstract

We report on a numerical investigation of the beaming effect of second harmonic generation (SHG) from a double layered bull's eye structure where a nanobowtie is sandwiched between. Both linear and nonlinear responses were calculated by using finite difference time domain (FDTD) method. Bottom and top layer's bull's eye were optimized for the fundamental field enhancement and the far-field SHG directional beaming, respectively. Combined with bowtie, a pair of pyramid tips, the maximum intensity of the SHG in the far field is about 5 orders of magnitude higher than that of the reference structure, a bare hole aperture on metal film. The divergence angle of SHG in the far field is confined within ±4°. Furthermore, the local field asymmetry is discussed.

Original language	English
Pages (from-to)	165-169
Number of pages	5
Journal	Optics Communications
Volume	441
DOIs	https://doi.org/10.1016/j.optcom.2019.02.065
Publication status	Published - 15 Jun 2019
Externally published	Yes

Keywords

Directional beaming
FDTD
Plasmonic
Second harmonic generation

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10.1016/j.optcom.2019.02.065

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title = "Beaming the second harmonic generation from a double layered bull's eye structure",

abstract = "We report on a numerical investigation of the beaming effect of second harmonic generation (SHG) from a double layered bull's eye structure where a nanobowtie is sandwiched between. Both linear and nonlinear responses were calculated by using finite difference time domain (FDTD) method. Bottom and top layer's bull's eye were optimized for the fundamental field enhancement and the far-field SHG directional beaming, respectively. Combined with bowtie, a pair of pyramid tips, the maximum intensity of the SHG in the far field is about 5 orders of magnitude higher than that of the reference structure, a bare hole aperture on metal film. The divergence angle of SHG in the far field is confined within ±4°. Furthermore, the local field asymmetry is discussed.",

keywords = "Directional beaming, FDTD, Plasmonic, Second harmonic generation",

author = "Fangfang Li and Peng Li and Guoguo Kang",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

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AU - Li, Fangfang

AU - Li, Peng

AU - Kang, Guoguo

PY - 2019/6/15

Y1 - 2019/6/15

N2 - We report on a numerical investigation of the beaming effect of second harmonic generation (SHG) from a double layered bull's eye structure where a nanobowtie is sandwiched between. Both linear and nonlinear responses were calculated by using finite difference time domain (FDTD) method. Bottom and top layer's bull's eye were optimized for the fundamental field enhancement and the far-field SHG directional beaming, respectively. Combined with bowtie, a pair of pyramid tips, the maximum intensity of the SHG in the far field is about 5 orders of magnitude higher than that of the reference structure, a bare hole aperture on metal film. The divergence angle of SHG in the far field is confined within ±4°. Furthermore, the local field asymmetry is discussed.

AB - We report on a numerical investigation of the beaming effect of second harmonic generation (SHG) from a double layered bull's eye structure where a nanobowtie is sandwiched between. Both linear and nonlinear responses were calculated by using finite difference time domain (FDTD) method. Bottom and top layer's bull's eye were optimized for the fundamental field enhancement and the far-field SHG directional beaming, respectively. Combined with bowtie, a pair of pyramid tips, the maximum intensity of the SHG in the far field is about 5 orders of magnitude higher than that of the reference structure, a bare hole aperture on metal film. The divergence angle of SHG in the far field is confined within ±4°. Furthermore, the local field asymmetry is discussed.

KW - Directional beaming

KW - FDTD

KW - Plasmonic

KW - Second harmonic generation

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DO - 10.1016/j.optcom.2019.02.065

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SN - 0030-4018

VL - 441

SP - 165

EP - 169

JO - Optics Communications

JF - Optics Communications

ER -

Beaming the second harmonic generation from a double layered bull's eye structure

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Keywords

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