Quantitative terahertz emission nanoscopy with multiresonant near-field probes

被引：20
|
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
收藏
页码：3572 / 3575
页数：4
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