Ultrafast All-Optical Switching with Magnetic Resonances in Nonlinear Dielectric Nanostructures

Maxim R. Shcherbakov; Polina P. Vabishchevich; Alexander S. Shorokhov; Katie E. Chong; Duk Yong Choi; Isabelle Staude; Andrey E. Miroshnichenko; Dragomir N. Neshev; Andrey A. Fedyanin; Yuri S. Kivshar

doi:10.1021/acs.nanolett.5b02989

Ultrafast All-Optical Switching with Magnetic Resonances in Nonlinear Dielectric Nanostructures

Maxim R. Shcherbakov^*, Polina P. Vabishchevich, Alexander S. Shorokhov, Katie E. Chong, Duk Yong Choi, Isabelle Staude, Andrey E. Miroshnichenko, Dragomir N. Neshev, Andrey A. Fedyanin, Yuri S. Kivshar

^*Corresponding author for this work

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

407 Citations (Scopus)

Abstract

We demonstrate experimentally ultrafast all-optical switching in subwavelength nonlinear dielectric nanostructures exhibiting localized magnetic Mie resonances. We employ amorphous silicon nanodisks to achieve strong self-modulation of femtosecond pulses with a depth of 60% at picojoule-per-disk pump energies. In the pump-probe measurements, we reveal that switching in the nanodisks can be governed by pulse-limited 65 fs-long two-photon absorption being enhanced by a factor of 80 with respect to the unstructured silicon film. We also show that undesirable free-carrier effects can be suppressed by a proper spectral positioning of the magnetic resonance, making such a structure the fastest all-optical switch operating at the nanoscale.

Original language	English
Pages (from-to)	6985-6990
Number of pages	6
Journal	Nano Letters
Volume	15
Issue number	10
DOIs	https://doi.org/10.1021/acs.nanolett.5b02989
Publication status	Published - 14 Oct 2015

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title = "Ultrafast All-Optical Switching with Magnetic Resonances in Nonlinear Dielectric Nanostructures",

abstract = "We demonstrate experimentally ultrafast all-optical switching in subwavelength nonlinear dielectric nanostructures exhibiting localized magnetic Mie resonances. We employ amorphous silicon nanodisks to achieve strong self-modulation of femtosecond pulses with a depth of 60% at picojoule-per-disk pump energies. In the pump-probe measurements, we reveal that switching in the nanodisks can be governed by pulse-limited 65 fs-long two-photon absorption being enhanced by a factor of 80 with respect to the unstructured silicon film. We also show that undesirable free-carrier effects can be suppressed by a proper spectral positioning of the magnetic resonance, making such a structure the fastest all-optical switch operating at the nanoscale.",

keywords = "Nonlinear optics, all-optical switching, femtosecond optics, metasurfaces, optical magnetism, silicon photonics",

author = "Shcherbakov, {Maxim R.} and Vabishchevich, {Polina P.} and Shorokhov, {Alexander S.} and Chong, {Katie E.} and Choi, {Duk Yong} and Isabelle Staude and Miroshnichenko, {Andrey E.} and Neshev, {Dragomir N.} and Fedyanin, {Andrey A.} and Kivshar, {Yuri S.}",

note = "Publisher Copyright: {\textcopyright} 2015 American Chemical Society.",

year = "2015",

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day = "14",

doi = "10.1021/acs.nanolett.5b02989",

language = "English",

volume = "15",

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T1 - Ultrafast All-Optical Switching with Magnetic Resonances in Nonlinear Dielectric Nanostructures

AU - Shcherbakov, Maxim R.

AU - Vabishchevich, Polina P.

AU - Shorokhov, Alexander S.

AU - Chong, Katie E.

AU - Choi, Duk Yong

AU - Staude, Isabelle

AU - Miroshnichenko, Andrey E.

AU - Neshev, Dragomir N.

AU - Fedyanin, Andrey A.

AU - Kivshar, Yuri S.

PY - 2015/10/14

Y1 - 2015/10/14

N2 - We demonstrate experimentally ultrafast all-optical switching in subwavelength nonlinear dielectric nanostructures exhibiting localized magnetic Mie resonances. We employ amorphous silicon nanodisks to achieve strong self-modulation of femtosecond pulses with a depth of 60% at picojoule-per-disk pump energies. In the pump-probe measurements, we reveal that switching in the nanodisks can be governed by pulse-limited 65 fs-long two-photon absorption being enhanced by a factor of 80 with respect to the unstructured silicon film. We also show that undesirable free-carrier effects can be suppressed by a proper spectral positioning of the magnetic resonance, making such a structure the fastest all-optical switch operating at the nanoscale.

AB - We demonstrate experimentally ultrafast all-optical switching in subwavelength nonlinear dielectric nanostructures exhibiting localized magnetic Mie resonances. We employ amorphous silicon nanodisks to achieve strong self-modulation of femtosecond pulses with a depth of 60% at picojoule-per-disk pump energies. In the pump-probe measurements, we reveal that switching in the nanodisks can be governed by pulse-limited 65 fs-long two-photon absorption being enhanced by a factor of 80 with respect to the unstructured silicon film. We also show that undesirable free-carrier effects can be suppressed by a proper spectral positioning of the magnetic resonance, making such a structure the fastest all-optical switch operating at the nanoscale.

KW - Nonlinear optics

KW - all-optical switching

KW - femtosecond optics

KW - metasurfaces

KW - optical magnetism

KW - silicon photonics

UR - http://www.scopus.com/inward/record.url?scp=84944390530&partnerID=8YFLogxK

U2 - 10.1021/acs.nanolett.5b02989

DO - 10.1021/acs.nanolett.5b02989

M3 - Article

SN - 1530-6984

VL - 15

SP - 6985

EP - 6990

JO - Nano Letters

JF - Nano Letters

IS - 10

ER -

Ultrafast All-Optical Switching with Magnetic Resonances in Nonlinear Dielectric Nanostructures

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