Near-field infrared nanospectroscopy of surface phonon-polariton resonances

被引：31

作者：

McArdle, P. ^{[1
]}

Lahneman, D. J. ^{[1
]}

Biswas, Amlan ^{[2
]}

Keilmann, F. ^{[3
,4
]}

Qazilbash, M. M. ^{[1
]}

机构：

[1] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA

[2] Univ Florida, Dept Phys, Gainesville, FL 32611 USA

[3] Ludwig Maximilians Univ Munchen, Fak Phys, Geschwister Scholl Pl 1, D-80539 Munich, Germany

[4] Ludwig Maximilians Univ Munchen, Ctr NanoSci CeNS, Geschwister Scholl Pl 1, D-80539 Munich, Germany

来源：

PHYSICAL REVIEW RESEARCH | 2020年 / 2卷 / 02期

基金：

美国国家科学基金会;

关键词：

ELECTROMAGNETIC SCATTERING; OPTICAL-PROPERTIES; ANALYTICAL-MODEL; MICROSCOPY; SPECTROSCOPY; PLASMONICS; NANOWIRES; DYNAMICS; DEVICES; PROBE;

D O I：

10.1103/PhysRevResearch.2.023272

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present combined experimental and numerical work on light-matter interactions at nanometer length scales. We report numerical simulations of near-field infrared nanospectroscopy that consider detailed tip geometry and have no free parameters. Our results match published spectral shapes of amplitude and phase measurements even for strongly resonant surface phonon-polariton (SPhP) modes. They also verify published absolute scattering amplitudes. A unique, ultrabroadband light source enables near-field amplitude and phase acquisition into the far-infrared spectral range. This allowed us to discover a strong SPhP resonance in the polar dielectric SrTiO3 (STO) at an similar to 24-mu m wavelength of incident light.

引用

页数：14

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