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research article

Ultrafast dynamic switching of optical response based on nonlinear hyperbolic metamaterial platform

Xie, Ze Tao
•
Sha, Yanhua
•
Wu, Jiaye  
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June 6, 2022
Optics Express

The pursuit of high-speed and on-chip optical communication systems has promoted extensive exploration of all-optical control of light-matter interactions via nonlinear optical processes. Here, we have numerically investigated the ultrafast dynamic switching of optical response using tunable hyperbolic metamaterial (HMM) which consists of five pairs of alternating layers of indium tin oxide (ITO) and SiO2. The nonlinearity of the HMM is analyzed by the ultrafast dynamics of the hot electrons in the epsilon-near-zero (ENZ) ITO. Our approach allows large and broad all-optical modulation of the effective permittivity and topology of the HMM on the femtosecond time-scale. Based on the proposed HMM platform, we have shown considerable tunability in the extinction ratio and Purcell enhancement under various pump fluence. In addition, we have achieved all-optical control of the coupling strength through depositing plasmonic resonators on the HMM platform. A significant tuning of the coupled resonance is observed by changing pump fluence, which leads to a switching time within 213 fs at a specific wavelength with a relative modulation depth more than 15 dB. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

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Type
research article
DOI
10.1364/OE.457875
Web of Science ID

WOS:000810533400113

Author(s)
Xie, Ze Tao
•
Sha, Yanhua
•
Wu, Jiaye  
•
Fu, H. Y.
•
Li, Qian
Date Issued

2022-06-06

Publisher

Optica Publishing Group

Published in
Optics Express
Volume

30

Issue

12

Start page

21634

End page

21648

Subjects

Optics

•

indium tin oxide

•

emission

•

resonance

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
PHOSL  
Available on Infoscience
July 4, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/188929
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