Near-field probing of image phonon-polaritons in hexagonal boron nitride on gold crystals

Sergey G. Menabde; Sergejs Boroviks; Jongtae Ahn; Jacob T. Heiden; Kenji Watanabe; Takashi Taniguchi; Tony Low; Do Kyung Hwang; N. Asger Mortensen; Min Seok Jang

doi:10.1126/sciadv.abn0627

Near-field probing of image phonon-polaritons in hexagonal boron nitride on gold crystals

Sergey G. Menabde, Sergejs Boroviks, Jongtae Ahn, Jacob T. Heiden, Kenji Watanabe, Takashi Taniguchi, Tony Low, Do Kyung Hwang, N. Asger Mortensen^*, Min Seok Jang

^*Kontaktforfatter

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

28 Downloads (Pure)

Abstract

Near-field mapping has been widely used to study hyperbolic phonon-polaritons in van der Waals crystals. However, an accurate measurement of the polaritonic loss remains challenging because of the inherent complexity of the near-field signal and the substrate-mediated loss. Here we demonstrate that large-area monocrystalline gold flakes, an atomically flat low-loss substrate for image polaritons, provide a platform for precise near-field measurement of the complex propagation constant of polaritons in van der Waals crystals. As a topical example, we measure propagation loss of the image phonon-polaritons in hexagonal boron nitride, revealing that their normalized propagation length exhibits a parabolic spectral dependency. Furthermore, we show that image phonon-polaritons exhibit up to a twice longer normalized propagation length, while being 2.4 times more compressed compared to the case of the dielectric substrate. We conclude that the monocrystalline gold flakes provide a unique nanophotonic platform for probing and exploitation of the image modes in low-dimensional materials.

Originalsprog	Engelsk
Artikelnummer	eabn0627
Tidsskrift	Science Advances
Vol/bind	8
Udgave nummer	28
ISSN	2375-2548
DOI	https://doi.org/10.1126/sciadv.abn0627
Status	Udgivet - jul. 2022

Bibliografisk note

Funding Information:
Funding: This work was supported by the Basic Science Research Program through the National Research Foundation of Korea grant 2021R1I1A1A01057510 (to S.G.M.), Samsung Research Funding and Incubation Center of Samsung Electronics grant SRFC-IT1702-14 (to S.G.M. and M.S.J.), Korea Institute of Science and Technology grant 2E31532 (to D.K.H.), Elemental Strategy Initiative conducted by the Ministry of Education, Culture, Sports, Science, and Technology of Japan grant JPMXP0112101001 (to K.W. and T.T.), JSPS KAKENHI grants 19H05790 and JP20H00354 (to K.W. and T.T.), VILLUM FONDEN grant 16498 (to N.A.M.), and the BK21 FOUR Program through the National Research Foundation of Korea.

Publisher Copyright:
© 2022 The Authors, some rights reserved

Dokumenter og links

10.1126/sciadv.abn0627Licens: CC BY

Open Access VersionLicens: CC BY

Citationsformater

@article{a6863a0701ad4e59ba58162c38f5bdd4,

title = "Near-field probing of image phonon-polaritons in hexagonal boron nitride on gold crystals",

abstract = "Near-field mapping has been widely used to study hyperbolic phonon-polaritons in van der Waals crystals. However, an accurate measurement of the polaritonic loss remains challenging because of the inherent complexity of the near-field signal and the substrate-mediated loss. Here we demonstrate that large-area monocrystalline gold flakes, an atomically flat low-loss substrate for image polaritons, provide a platform for precise near-field measurement of the complex propagation constant of polaritons in van der Waals crystals. As a topical example, we measure propagation loss of the image phonon-polaritons in hexagonal boron nitride, revealing that their normalized propagation length exhibits a parabolic spectral dependency. Furthermore, we show that image phonon-polaritons exhibit up to a twice longer normalized propagation length, while being 2.4 times more compressed compared to the case of the dielectric substrate. We conclude that the monocrystalline gold flakes provide a unique nanophotonic platform for probing and exploitation of the image modes in low-dimensional materials.",

author = "Menabde, {Sergey G.} and Sergejs Boroviks and Jongtae Ahn and Heiden, {Jacob T.} and Kenji Watanabe and Takashi Taniguchi and Tony Low and Hwang, {Do Kyung} and Mortensen, {N. Asger} and Jang, {Min Seok}",

note = "Publisher Copyright: {\textcopyright} 2022 The Authors, some rights reserved",

year = "2022",

month = jul,

doi = "10.1126/sciadv.abn0627",

language = "English",

volume = "8",

journal = "Science Advances",

issn = "2375-2548",

publisher = "American Association for the Advancement of Science",

number = "28",

}

TY - JOUR

T1 - Near-field probing of image phonon-polaritons in hexagonal boron nitride on gold crystals

AU - Menabde, Sergey G.

AU - Boroviks, Sergejs

AU - Ahn, Jongtae

AU - Heiden, Jacob T.

AU - Watanabe, Kenji

AU - Taniguchi, Takashi

AU - Low, Tony

AU - Hwang, Do Kyung

AU - Mortensen, N. Asger

AU - Jang, Min Seok

PY - 2022/7

Y1 - 2022/7

N2 - Near-field mapping has been widely used to study hyperbolic phonon-polaritons in van der Waals crystals. However, an accurate measurement of the polaritonic loss remains challenging because of the inherent complexity of the near-field signal and the substrate-mediated loss. Here we demonstrate that large-area monocrystalline gold flakes, an atomically flat low-loss substrate for image polaritons, provide a platform for precise near-field measurement of the complex propagation constant of polaritons in van der Waals crystals. As a topical example, we measure propagation loss of the image phonon-polaritons in hexagonal boron nitride, revealing that their normalized propagation length exhibits a parabolic spectral dependency. Furthermore, we show that image phonon-polaritons exhibit up to a twice longer normalized propagation length, while being 2.4 times more compressed compared to the case of the dielectric substrate. We conclude that the monocrystalline gold flakes provide a unique nanophotonic platform for probing and exploitation of the image modes in low-dimensional materials.

AB - Near-field mapping has been widely used to study hyperbolic phonon-polaritons in van der Waals crystals. However, an accurate measurement of the polaritonic loss remains challenging because of the inherent complexity of the near-field signal and the substrate-mediated loss. Here we demonstrate that large-area monocrystalline gold flakes, an atomically flat low-loss substrate for image polaritons, provide a platform for precise near-field measurement of the complex propagation constant of polaritons in van der Waals crystals. As a topical example, we measure propagation loss of the image phonon-polaritons in hexagonal boron nitride, revealing that their normalized propagation length exhibits a parabolic spectral dependency. Furthermore, we show that image phonon-polaritons exhibit up to a twice longer normalized propagation length, while being 2.4 times more compressed compared to the case of the dielectric substrate. We conclude that the monocrystalline gold flakes provide a unique nanophotonic platform for probing and exploitation of the image modes in low-dimensional materials.

U2 - 10.1126/sciadv.abn0627

DO - 10.1126/sciadv.abn0627

M3 - Journal article

C2 - 35857499

AN - SCOPUS:85134249373

SN - 2375-2548

VL - 8

JO - Science Advances

JF - Science Advances

IS - 28

M1 - eabn0627

ER -

Near-field probing of image phonon-polaritons in hexagonal boron nitride on gold crystals

Abstract

Bibliografisk note

Dokumenter og links

Fingeraftryk

Citationsformater