Three-dimensional grating nanowires for enhanced light trapping

Hoo Cheol Lee; Jin Young Na; Yoon Jong Moon; Jin Sung Park; Ho Seok Ee; Hong Gyu Park; Sun Kyung Kim

doi:10.1364/OL.41.001578

Three-dimensional grating nanowires for enhanced light trapping

Hoo Cheol Lee
, Jin Young Na
, Yoon Jong Moon
, Jin Sung Park
, Ho Seok Ee
, Hong Gyu Park
, Sun Kyung Kim^*

^*Corresponding author for this work

Department of Physics

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

13 Citations (Scopus)

Abstract

We propose rationally designed 3D grating nanowires for boosting light-matter interactions. Full-vectorial simulations show that grating nanowires sustain high-amplitude waveguide modes and induce a strong optical antenna effect, which leads to an enhancement in nanowire absorption at specific or broadband wavelengths. Analyses of mode profiles and scattering spectra verify that periodic shells convert a normal plane wave into trapped waveguide modes, thus giving rise to scattering dips. A 200 nm diameter crystalline Si nanowire with designed periodic shells yields an enormously large current density of ∼28 mA?cm² together with an absorption efficiency exceeding unity at infrared wavelengths. The grating nanowires studied herein will provide an extremely efficient absorption platform for photovoltaic devices and colorsensitive photodetectors.

Original language	English
Pages (from-to)	1578-1581
Number of pages	4
Journal	Optics Letters
Volume	41
Issue number	7
DOIs	https://doi.org/10.1364/OL.41.001578
Publication status	Published - 2016 Apr 1

Bibliographical note

Publisher Copyright:
© 2016 Optical Society of America.

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OL.41.001578

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title = "Three-dimensional grating nanowires for enhanced light trapping",

abstract = "We propose rationally designed 3D grating nanowires for boosting light-matter interactions. Full-vectorial simulations show that grating nanowires sustain high-amplitude waveguide modes and induce a strong optical antenna effect, which leads to an enhancement in nanowire absorption at specific or broadband wavelengths. Analyses of mode profiles and scattering spectra verify that periodic shells convert a normal plane wave into trapped waveguide modes, thus giving rise to scattering dips. A 200 nm diameter crystalline Si nanowire with designed periodic shells yields an enormously large current density of ∼28 mA?cm2 together with an absorption efficiency exceeding unity at infrared wavelengths. The grating nanowires studied herein will provide an extremely efficient absorption platform for photovoltaic devices and colorsensitive photodetectors.",

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AU - Lee, Hoo Cheol

AU - Na, Jin Young

AU - Moon, Yoon Jong

AU - Park, Jin Sung

AU - Ee, Ho Seok

AU - Park, Hong Gyu

AU - Kim, Sun Kyung

PY - 2016/4/1

Y1 - 2016/4/1

N2 - We propose rationally designed 3D grating nanowires for boosting light-matter interactions. Full-vectorial simulations show that grating nanowires sustain high-amplitude waveguide modes and induce a strong optical antenna effect, which leads to an enhancement in nanowire absorption at specific or broadband wavelengths. Analyses of mode profiles and scattering spectra verify that periodic shells convert a normal plane wave into trapped waveguide modes, thus giving rise to scattering dips. A 200 nm diameter crystalline Si nanowire with designed periodic shells yields an enormously large current density of ∼28 mA?cm2 together with an absorption efficiency exceeding unity at infrared wavelengths. The grating nanowires studied herein will provide an extremely efficient absorption platform for photovoltaic devices and colorsensitive photodetectors.

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ER -

Three-dimensional grating nanowires for enhanced light trapping

Abstract

Bibliographical note

ASJC Scopus subject areas

UN SDGs

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