Active control of anapole states by structuring the phase-change alloy Ge2Sb2Te5

Jingyi Tian, Hao Luo, Yuanqing Yang, Fei Ding, Yurui Qu, Ding Zhao, Min Qiu*, Sergey I. Bozhevolnyi

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Resumé

High-index dielectric nanoparticles supporting a distinct series of Mie resonances have enabled a new class of optical antennas with unprecedented functionalities. The great wealth of multipolar responses has not only brought in new physical insight but also spurred practical applications. However, how to make such a colorful resonance palette actively tunable is still elusive. Here, we demonstrate that the structured phase-change alloy Ge2Sb2Te5 (GST) can support a diverse set of multipolar Mie resonances with active tunability. By harnessing the dramatic optical contrast of GST, we realize broadband (Δλ/λ ~ 15%) mode shifting between an electric dipole resonance and an anapole state. Active control of higher-order anapoles and multimodal tuning are also investigated, which make the structured GST serve as a multispectral optical switch with high extinction contrasts (>6 dB). With all these findings, our study provides a new direction for realizing active nanophotonic devices.
OriginalsprogEngelsk
Artikelnummer396
TidsskriftNature Communications
Vol/bind10
Antal sider9
ISSN2041-1723
DOI
StatusUdgivet - 23. jan. 2019

Fingeraftryk

active control
Equipment and Supplies
Nanophotonics
Optical switches
electric dipoles
extinction
switches
antennas
Tuning
tuning
Antennas
Nanoparticles
broadband
nanoparticles
Direction compound

Citer dette

Tian, Jingyi ; Luo, Hao ; Yang, Yuanqing ; Ding, Fei ; Qu, Yurui ; Zhao, Ding ; Qiu, Min ; Bozhevolnyi, Sergey I. / Active control of anapole states by structuring the phase-change alloy Ge2Sb2Te5. I: Nature Communications. 2019 ; Bind 10.
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title = "Active control of anapole states by structuring the phase-change alloy Ge2Sb2Te5",
abstract = "High-index dielectric nanoparticles supporting a distinct series of Mie resonances have enabled a new class of optical antennas with unprecedented functionalities. The great wealth of multipolar responses has not only brought in new physical insight but also spurred practical applications. However, how to make such a colorful resonance palette actively tunable is still elusive. Here, we demonstrate that the structured phase-change alloy Ge2Sb2Te5 (GST) can support a diverse set of multipolar Mie resonances with active tunability. By harnessing the dramatic optical contrast of GST, we realize broadband (Δλ/λ ~ 15{\%}) mode shifting between an electric dipole resonance and an anapole state. Active control of higher-order anapoles and multimodal tuning are also investigated, which make the structured GST serve as a multispectral optical switch with high extinction contrasts (>6 dB). With all these findings, our study provides a new direction for realizing active nanophotonic devices.",
author = "Jingyi Tian and Hao Luo and Yuanqing Yang and Fei Ding and Yurui Qu and Ding Zhao and Min Qiu and Bozhevolnyi, {Sergey I.}",
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Active control of anapole states by structuring the phase-change alloy Ge2Sb2Te5. / Tian, Jingyi; Luo, Hao; Yang, Yuanqing; Ding, Fei; Qu, Yurui; Zhao, Ding; Qiu, Min; Bozhevolnyi, Sergey I.

I: Nature Communications, Bind 10, 396, 23.01.2019.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Active control of anapole states by structuring the phase-change alloy Ge2Sb2Te5

AU - Tian, Jingyi

AU - Luo, Hao

AU - Yang, Yuanqing

AU - Ding, Fei

AU - Qu, Yurui

AU - Zhao, Ding

AU - Qiu, Min

AU - Bozhevolnyi, Sergey I.

PY - 2019/1/23

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N2 - High-index dielectric nanoparticles supporting a distinct series of Mie resonances have enabled a new class of optical antennas with unprecedented functionalities. The great wealth of multipolar responses has not only brought in new physical insight but also spurred practical applications. However, how to make such a colorful resonance palette actively tunable is still elusive. Here, we demonstrate that the structured phase-change alloy Ge2Sb2Te5 (GST) can support a diverse set of multipolar Mie resonances with active tunability. By harnessing the dramatic optical contrast of GST, we realize broadband (Δλ/λ ~ 15%) mode shifting between an electric dipole resonance and an anapole state. Active control of higher-order anapoles and multimodal tuning are also investigated, which make the structured GST serve as a multispectral optical switch with high extinction contrasts (>6 dB). With all these findings, our study provides a new direction for realizing active nanophotonic devices.

AB - High-index dielectric nanoparticles supporting a distinct series of Mie resonances have enabled a new class of optical antennas with unprecedented functionalities. The great wealth of multipolar responses has not only brought in new physical insight but also spurred practical applications. However, how to make such a colorful resonance palette actively tunable is still elusive. Here, we demonstrate that the structured phase-change alloy Ge2Sb2Te5 (GST) can support a diverse set of multipolar Mie resonances with active tunability. By harnessing the dramatic optical contrast of GST, we realize broadband (Δλ/λ ~ 15%) mode shifting between an electric dipole resonance and an anapole state. Active control of higher-order anapoles and multimodal tuning are also investigated, which make the structured GST serve as a multispectral optical switch with high extinction contrasts (>6 dB). With all these findings, our study provides a new direction for realizing active nanophotonic devices.

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