Super-resolution lightwave tomography of electronic bands in quantum materials

M. Borsch, C. P. Schmid, L. Weigl, S. Schlauderer, N. Hofmann, C. Lange, J. T. Steiner, S. W. Koch, R. Huber, M. Kira

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Searching for quantum functionalities requires access to the electronic structure, constituting the foundation of exquisite spin-valley-electronic, topological, and many-body effects. All-optical bandstructure reconstruction could directly connect electronic structure with the coveted quantum phenomena if strong lightwaves transported localized electrons within preselected bands. Here, we demonstrate that harmonic sideband (HSB) generation in monolayer tungsten diselenide creates distinct electronic interference combs in momentum space. Locating these momentum combs in spectroscopy enables super-resolution tomography of key band-structure details in situ. We experimentally tuned the optical-driver frequency by a full octave and show that the predicted super-resolution manifests in a critical intensity and frequency dependence of HSBs. Our concept offers a practical, all-optical, fully three-dimensional tomography of electronic structure even in microscopically small quantum materials, band by band.

Original languageEnglish (US)
Pages (from-to)1204-1207
Number of pages4
JournalScience
Volume370
Issue number6521
DOIs
StatePublished - Dec 4 2020
Externally publishedYes

ASJC Scopus subject areas

  • General

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