Coherent two-dimensional electronic spectroscopy integrated with confocal back focal plane microscopy

Trideep Kawde; Pavel Trofimov; Anton Trenczek; Matteo Russo; Jasper Wilhelm Schwering; Hélène Seiler

Coherent two-dimensional electronic spectroscopy integrated with confocal back focal plane microscopy

Materials Science 2026-07-02 v1 Instrumentation and Detectors

Authors: Trideep Kawde , Pavel Trofimov , Anton Trenczek , Matteo Russo , Jasper Wilhelm Schwering , Hélène Seiler

Abstract

We introduce a setup for coherent two-dimensional electronic spectroscopy in the pump-probe reflection geometry that is integrated with a confocal back focal plane imaging microscope. The angle-resolved capability is utilized to control pump and probe wavevectors, while real space imaging enables co-localization of the collection spots for linear and ultrafast experiments. Compression of pulses down to 20 fs is achieved. We demonstrate the capabilities of this approach on an exfoliated WSe $_2$ monolayer on Si/SiO $_2$ . The setup is suited to investigate excitons and exciton-polaritons in 2D Materials and their heterostructures.

Cite

@article{arxiv.2607.02178,
  title  = {Coherent two-dimensional electronic spectroscopy integrated with confocal back focal plane microscopy},
  author = {Trideep Kawde and Pavel Trofimov and Anton Trenczek and Matteo Russo and Jasper Wilhelm Schwering and Hélène Seiler},
  journal= {arXiv preprint arXiv:2607.02178},
  year   = {2026}
}