Quantitative terahertz emission nanoscopy with multiresonant near-field probes

被引：22

作者：

Mooshammer, Fabian ^{[1
,2
,3
]}

Plankl, Markus ^{[1
,2
]}

Siday, Thomas ^{[1
,2
]}

Zizlsperger, Martin ^{[1
,2
]}

Sandner, Fabian ^{[1
,2
]}

Vitalone, Rocco ^{[3
]}

Jing, Ran ^{[3
]}

Huber, Markus A. ^{[1
,2
]}

Basov, D. N. ^{[3
]}

Huber, Rupert ^{[1
,2
]}

机构：

[1] Univ Regensburg, Dept Phys, D-93040 Regensburg, Germany

[2] Univ Regensburg, Regensburg Ctr Ultrafast Nanoscopy RUN, D-93040 Regensburg, Germany

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

来源：

OPTICS LETTERS | 2021年 / 46卷 / 15期

关键词：

MICROSCOPY; DYNAMICS;

D O I：

10.1364/OL.430400

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

By sampling terahertz waveforms emitted from InAs surfaces, we reveal how the entire, realistic geometry of typical near-field probes drastically impacts the broadband electromagnetic fields. In the time domain, these modifications manifest as a shift in the carrier-envelope phase and emergence of a replica pulse with a time delay dictated by the length of the cantilever. This interpretation is fully corroborated by quantitative simulations of terahertz emission nanoscopy based on the finite element method. Our approach provides a solid theoretical framework for quantitative nanospectroscopy and sets the stage for a reliable description of subcycle, near-field microscopy at terahertz frequencies. (C) 2021 Optical Society of America

引用

页码：3572 / 3575

页数：4

共 26 条

[1] Ultrafast photocurrents at the surface of the three-dimensional topological insulator Bi2Se3 [J].