Efficiency of Launching Highly Confined Polaritons by Infrared Light Incident on a Hyperbolic Material

被引：93

作者：

Dai, Siyuan ^{[1
]}

Ma, Qiong ^{[3
]}

Yang, Yafang ^{[3
]}

Rosenfeld, Jeremy ^{[1
]}

Goldflam, Michael D. ^{[1
]}

McLeod, Alex ^{[1
]}

Sun, Zhiyuan ^{[1
]}

Andersen, Trond I. ^{[3
]}

Fei, Zhe ^{[1
]}

Liu, Mengkun ^{[1
]}

Shoa, Yinming ^{[1
]}

Watanabe, Kenji ^{[4
]}

Taniguchi, Takashi ^{[4
]}

Thiemens, Mark ^{[2
]}

Keilmann, Fritz ^{[5
,6
]}

Jarillo-Herrero, Pablo ^{[3
]}

Fogler, Michael M. ^{[1
]}

Basov, D. N. ^{[1
,7
]}

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[2] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA

[3] MIT, Dept Phys, Cambridge, MA 02215 USA

[4] Natl Inst Mat Sci, Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan

[5] Ludwig Maximilians Univ Munchen, D-80539 Munich, Germany

[6] Ctr Nanosci, D-80539 Munich, Germany

[7] Columbia Univ, Dept Phys, New York, NY 10027 USA

来源：

NANO LETTERS | 2017年 / 17卷 / 09期

关键词：

Polariton launching hyperbolic materials; hexagonal boron nitride; nano-optics; van der. Waals materials; HEXAGONAL BORON-NITRIDE; DER-WAALS HETEROSTRUCTURES; SURFACE PHONON POLARITONS; GRAPHENE PLASMONS; OPTICAL HYPERLENS; PROPAGATION; METAMATERIALS; SPECTROSCOPY;

D O I：

10.1021/acs.nanolett.7b01587

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We investigated phononpolaritons in hexagonal boron nitride-a naturally hyperbolic van der Waals material-by means of the scattering-type scanning near-field optical microscopy. Real-space nanoimages we have obtained detail how the polaritons are launched when the light incident on a thin hexagonal boron nitride slab is scattered by various intrinsic and extrinsic inhomogeneities, including sample edges, metallic nanodisks deposited on its top surface, random defects, and surface impurities. The scanned tip of the near-field microscope is itself a polariton launcher whose efficiency proves to be superior to all the other types of polariton launchers we studied. Our work may inform future development of polaritonic nanodevices as well as fundamental studies of collective modes in van der Waals materials.

引用

页码：5285 / 5290

页数：6

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