Quantitative terahertz emission nanoscopy with multiresonant near-field probes
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 22, 2021
- Source ID
- 10.1364/ol.430400
Entities
People
- D. N. Basov
- Fabian Mooshammer
- Fabian Sandner
- Markus A. Huber
- Markus Plankl
- Martin Zizlsperger
- Ran Jing
- Rocco Vitalone
- Rupert Huber
- Thomas Siday
Organizations
- Alexander von Humboldt Foundation
- Columbia University
- Defense Advanced Research Projects Agency
- German Research Foundation
- University of Regensburg