Abstract
We introduce a novel contrast mechanism in near-field microscopy which allows for all-optical atomic-scale microscopy with subcycle temporal resolution. To this end, we combine near-field microscopy with ultrahigh vacuum, low temperatures and sub-nanometer tip tapping amplitudes. On these scales, a surprisingly efficient non-classical near-field response occurs, which follows the vector potential of light and is strictly confined to atomic length scales. This ultrafast signal features an optical phase delay of ~π/2 and facilitates tracking of tunnelling dynamics. Our method reveals nanoscale defects and captures current transients on semiconducting van-der-Waals materials with subcycle sampling, allowing us to record the quantum flow of electrons in conductive and insulating quantum materials at ultimate spatiotemporal scales.
Original language | English |
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Title of host publication | Terahertz Emitters, Receivers, and Applications XV |
Editors | Manijeh Razeghi, Mona Jarrahi |
Publisher | SPIE |
Number of pages | 3 |
ISBN (Electronic) | 9781510679429 |
DOIs | |
Publication status | Published - 1 Oct 2024 |
Event | Terahertz Emitters, Receivers, and Applications XV 2024 - San Diego, United States Duration: 18 Aug 2024 → 19 Aug 2024 |
Publication series
Name | Proceedings of SPIE, the International Society for Optical Engineering |
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Publisher | SPIE |
Volume | 13141 |
ISSN (Print) | 0277-786X |
ISSN (Electronic) | 1996-756X |
Conference
Conference | Terahertz Emitters, Receivers, and Applications XV 2024 |
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Country/Territory | United States |
City | San Diego |
Period | 18/08/24 → 19/08/24 |
Bibliographical note
Publisher Copyright:© 2024 SPIE.
Keywords
- all-optical microscopy
- atomic resolution
- near field microscopy
- subcycle resolution
- terahertz
- ultrafast nanoscopy
- van-der-Waals materials
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering