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Ultrafast imaging of terahertz electric waveforms using quantum dots

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00006032
URN to cite this document: urn:nbn:de:bvb:703-epub-6032-1

Title data

Heindl, Moritz ; Kirkwood, Nicholas ; Lauster, Tobias ; Lang, Julia ; Retsch, Markus ; Mulvaney, Paul ; Herink, Georg:
Ultrafast imaging of terahertz electric waveforms using quantum dots.
In: Light : Science and Applications. Vol. 11 (1 January 2022) . - No. 5.
ISSN 2047-7538
DOI der Verlagsversion: https://doi.org/10.1038/s41377-021-00693-5

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Project financing: Deutsche Forschungsgemeinschaft

Abstract

Microscopic electric fields govern the majority of elementary excitations in condensed matter and drive electronics at frequencies approaching the Terahertz (THz) regime. However, only few imaging schemes are able to resolve subwavelength fields in the THz range, such as scanning-probe techniques, electro-optic sampling, and ultrafast electron microscopy. Still, intrinsic constraints on sample geometry, acquisition speed and field strength limit their applicability. Here, we harness the quantum-confined Stark-effect to encode ultrafast electric near-fields into colloidal quantum dot luminescence. Our approach, termed Quantum-probe Field Microscopy (QFIM), combines far-field imaging of visible photons with phase-resolved sampling of electric waveforms. By capturing ultrafast movies, we spatio-temporally resolve a Terahertz resonance inside a bowtie antenna and unveil the propagation of a Terahertz waveguide excitation deeply in the sub-wavelength regime. The demonstrated QFIM approach is compatible with strong-field excitation and sub-micrometer resolution—introducing a direct route towards ultrafast field imaging of complex nanodevices inoperando.

Further data

Item Type: Article in a journal
Keywords: Nanophotonics and plasmonics; Quantum dots
DDC Subjects: 500 Science > 530 Physics
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Juniorprofessor Experimental Physics VIII - Ultrafast Dynamics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Juniorprofessor Experimental Physics VIII - Ultrafast Dynamics > Juniorprofessor Experimental Physics VIII - Ultrafast Dynamics - Juniorprof. Dr. Georg Herink
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-6032-1
Date Deposited: 14 Mar 2022 06:02
Last Modified: 14 Mar 2022 06:11
URI: https://epub.uni-bayreuth.de/id/eprint/6032

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