Near-Field Spectroscopy of Cylindrical Phonon-Polariton Antennas

Mancini，Andrea1; Gubbin，Christopher R.2; Berté，Rodrigo1; Martini，Francesco2,3; Politi，Alberto2; Cortés，Emiliano1; Li，Yi4; De Liberato，Simone2; Maier，Stefan A.1,5

2020-07-28

10.1021/acsnano.0c02784

ACS Nano   影响因子和分区

1936-0851

1936-086X

Surface phonon polaritons (SPhPs) are hybrid light-matter states in which light strongly couples to lattice vibrations inside the Reststrahlen band of polar dielectrics at mid-infrared frequencies. Antennas supporting localized surface phonon polaritons (LSPhPs) easily outperform their plasmonic counterparts operating in the visible or near-infrared in terms of field enhancement and confinement thanks to the inherently slower phonon-phonon scattering processes governing SPhP decay. In particular, LSPhP antennas have attracted considerable interest for thermal management at the nanoscale, where the emission strongly diverts from the usual far-field blackbody radiation due to the presence of evanescent waves at the surface. However, far-field measurements cannot shed light on the behavior of antennas in the near-field region. To overcome this limitation, we employ scattering-scanning near-field optical microscopy (sSNOM) to unveil the spectral near-field response of 3C-SiC antenna arrays. We present a detailed description of the behavior of the antenna resonances by comparing far-field and near-field spectra and demonstrate the existence of a mode with no net dipole moment, absent in the far-field spectra, but of importance for applications that exploit the heightened electromagnetic near fields. Furthermore, we investigate the perturbation in the antenna response induced by the presence of the AFM tip, which can be further extended toward situations where for example strong IR emitters couple to LSPhP modes.

dark mode localized surface phonon polaritons mid-infrared near-field spectroscopy silicon carbide

SCI ; EI

英语

NI论文

其他

Deutsche Forschungsgemeinschaft[EXC 2089/1-390776260] ; European Commission[802989 CATALIGHT] ; Royal Society[RGF \EA\181001] ; European Unions Framework Programme for Research and Innovation Horizon 2020 (20142020) under the Marie Skodowska-Curie Grant[754388] ; European Union under the project H2020-MSCA-IF-2017[795923]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000557762800072

AMER CHEMICAL SOC

20204509468912

Phonons ; Antenna arrays ; Infrared devices ; Lattice vibrations ; Near field scanning optical microscopy ; Photons

Light/Optics:741.1 ; Inorganic Compounds:804.2 ; Atomic and Molecular Physics:931.3 ; Crystal Lattice:933.1.1

2-s2.0-85089709074

Scopus

1.Faculty of Physics,Germany
2.School of Physics and Astronomy,University of Southampton,SO17 1BJ,United Kingdom
3.Istituto di Fotonica e Nanotecnologie-CNR,Roma,Via Cineto Romano 42,00156,Italy
4.School of Microelectronics,MOE Engineering Research Center of Integrated Circuits for Next Generation Communications,Southern University of Science and Technology,Shenzhen,518055,China
5.Department of Physics,Imperial College London,London,SW7 2AZ,United Kingdom

Mancini，Andrea,Gubbin，Christopher R.,Berté，Rodrigo,et al. Near-Field Spectroscopy of Cylindrical Phonon-Polariton Antennas[J]. ACS Nano,2020,14(7):8508-8517.

Mancini，Andrea.,Gubbin，Christopher R..,Berté，Rodrigo.,Martini，Francesco.,Politi，Alberto.,...&Maier，Stefan A..(2020).Near-Field Spectroscopy of Cylindrical Phonon-Polariton Antennas.ACS Nano,14(7),8508-8517.

Mancini，Andrea,et al."Near-Field Spectroscopy of Cylindrical Phonon-Polariton Antennas".ACS Nano 14.7(2020):8508-8517.