Hyperbolic phonon polaritons in hexagonal boron nitride

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Hyperbolic phonon polaritons in hexagonal boron nitride

Abstract (2016)

Author(s)

S. Dai (University of California)

Q. Ma (Massachusetts Institute of Technology)

Z. Fei (University of California)

M. Liu (University of California)

M.D. Goldflam (University of California)

T. Andersen (Massachusetts Institute of Technology)

W. Garnett (University of California)

W. Regan (University of California)

M. Wagner (University of California)

A.S. McLeod (University of California)

A. Rodin (National University of Singapore)

Shouen Zhu (TU Delft - Mechanical Engineering)

Kenji Watanabe (National Institute for Materials Science)

T. Taniguchi (National Institute for Materials Science)

G. Dominguez (University of California)

M. Thiemens (University of California)

A.H. Castro Neto (National University of Singapore)

G.C.A.M. Janssen (TU Delft - Mechanical Engineering)

A. Zetti (University of California)

F. Keilmann (Ludwig Maximilians University)

P. Jarillo-Herrero (Massachusetts Institute of Technology)

M.M. Fogler (University of California)

D.N. Basov (University of California)

Research Group

Micro and Nano Engineering

DOI related publication

https://doi.org/10.1117/12.2236367

To reference this document use

https://resolver.tudelft.nl/uuid:c5998ee0-4721-4724-9a78-02bd4a6e4577

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Publication Year

2016

Language

English

Research Group

Micro and Nano Engineering

Bibliographical Note

Voordracht is op You Tube geplaatst en in proceedings opgenomen en niet in de vorm van een artikel gepubliceerd.

Event

SPIE Nanoscience + Engineering: Metamaterials, Metadevices, and Metasystems 2016 (2016-08-28 - 2016-09-01), San Diego, CA, United States

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Abstract

Uniaxial materials whose axial and tangential permittivities have opposite signs are referred to as indefinite or hyperbolic media. While hyperbolic responses are normally achieved with metamaterials, hexagonal boron nitride (hBN) naturally possesses this property due to the anisotropic phonons in the mid-infrared. Using scattering-type scanning near-field optical microscopy, we studied polaritonic phenomena in hBN. We performed infrared nano-imaging of highly confined and low-loss hyperbolic phonon polaritons in hBN. The polariton wavelength was shown to be governed by the hBN thickness according to a linear law persisting down to few atomic layers [1]. Additionally, we carried out the modification of hyperbolic response in meta-structures comprised of a mononlayer graphene deposited on hBN [2]. Electrostatic gating of the top graphene layer allows for the modification of wavelength and intensity of hyperbolic phonon polaritons in bulk hBN. The physics of the modification originates from the plasmon-phonon coupling in the hyperbolic medium. Furthermore, we demonstrated the “hyperlens” for subdiffractional focusing and imaging using a slab of hBN [3]. References [1] S. Dai et al., Science, 343, 1125 (2014). [2] S. Dai et al., Nature Nanotechnology, 10, 682 (2015). [3] S. Dai et al., Nature Communications, 6, 6963 (2015).