Header

UZH-Logo

Maintenance Infos

Polarization-sensitive reconstruction of transient local THz fields at dielectric interfaces


Waltar, Kay; Haase, Johannes; Pan, Rui; Golz, Torsten; Kliuiev, Pavel; Weinl, Michael; Schreck, Matthias; Bajt, Saša; Stojanovic, Nikola; van Bokhoven, Jeroen A; Hengsberger, Matthias; Osterwalder, Jürg; Castiglioni, Luca (2019). Polarization-sensitive reconstruction of transient local THz fields at dielectric interfaces. Optica, 6(11):1431-1436.

Abstract

Intense THz fields can be used to excite specific low-frequency modes in condensed matter or drive confined currents in nano-structured arrays, paving the way for a new class of optoelectronic devices. The long wavelength enables spatially confined field enhancement due to interaction with metallic structures and interference effects at dielectric interfaces. We use THz photoelectron streaking for the polarization-sensitive reconstruction of all electric field components at dielectric and metallic interfaces. This is realized in a THz/x-ray pump–probe experiment where x-ray emitted photoelectrons probe the effective THz field in close surface proximity. We observe distinct differences in the THz response of a nano-structured Pt thin film and a Pt(111) bulk crystal, in particular for the parallel field component. Simulations of the nanoscale spatial field modulation at metallic islands on the thin film provide design parameters for different sensitivity regimes with respect to local fields.

Abstract

Intense THz fields can be used to excite specific low-frequency modes in condensed matter or drive confined currents in nano-structured arrays, paving the way for a new class of optoelectronic devices. The long wavelength enables spatially confined field enhancement due to interaction with metallic structures and interference effects at dielectric interfaces. We use THz photoelectron streaking for the polarization-sensitive reconstruction of all electric field components at dielectric and metallic interfaces. This is realized in a THz/x-ray pump–probe experiment where x-ray emitted photoelectrons probe the effective THz field in close surface proximity. We observe distinct differences in the THz response of a nano-structured Pt thin film and a Pt(111) bulk crystal, in particular for the parallel field component. Simulations of the nanoscale spatial field modulation at metallic islands on the thin film provide design parameters for different sensitivity regimes with respect to local fields.

Statistics

Citations

Altmetrics

Downloads

12 downloads since deposited on 21 Nov 2019
6 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Electronic, Optical and Magnetic Materials
Physical Sciences > Atomic and Molecular Physics, and Optics
Uncontrolled Keywords:Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Language:English
Date:20 November 2019
Deposited On:21 Nov 2019 15:08
Last Modified:12 Sep 2020 11:49
Publisher:Optical Society of America
ISSN:2334-2536
OA Status:Green
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1364/optica.6.001431

Download

Green Open Access

Download PDF  'Polarization-sensitive reconstruction of transient local THz fields at dielectric interfaces'.
Preview
Content: Published Version
Filetype: PDF
Size: 1MB
View at publisher