Coherent multidimensional widefield microscopy
Year: 2026
Authors: Azarm M., Asif R., Milloch A., Proietto F., Datta D., Lanseur A., Raha S., Fabbri F., Bianco F., Preda F., Perri A., Chatterjee S., Ye ZL., Cerullo G., Pagliara S., Ferrini G., Giannetti C.
Autors Affiliation: Univ Cattolica Sacro Cuore, Dept Math & Phys, I-25133 Brescia, Italy; Univ Cattolica Sacro Cuore, ILAMP Interdisciplinary Labs Adv Mat Phys, I-25133 Brescia, Italy; Katholieke Univ Leuven, Dept Phys & Astron, B-3001 Leuven, Belgium; Katholieke Univ Leuven, Dept Biosyst, B-3001 Leuven, Belgium; Purdue Univ, Elmore Family Sch Elect & Comp Engn, 465 Northwestern Ave, W Lafayette, IN 47907 USA; Univ Claude Bernard Lyon 1, Villeurbanne, France; Ist Nanosci CNR, NEST Lab, Piazza S Silvestro 12, I-56127 Pisa, Italy; NIREOS SRL, Via G Durando 39, I-20158 Milan, Italy; Univ British Columbia, Quantum Matter Inst, Vancouver, BC V6T 1Z4, Canada; Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada; Politecn Milan, Dept Phys, Piazza Leonardo Vinci 32, I-20133 Milan, Italy; CNR, IFN, Piazza Leonardo Vinci 32, I-20133 Milan, Italy; CNR INO, Natl Inst Opt, via Branze 45, I-25123 Brescia, Italy.
Abstract: Understanding how electronic excitations evolve across space and time is essential for revealing the microscopic processes underlying quantum and optoelectronic materials. However, existing approaches cannot simultaneously resolve ultrafast coherent dynamics with microscopic spatial information: pump-probe microscopy lacks access to quantum coherence, while two-dimensional electronic spectroscopy (2DES) requires slow point-by-point scanning for spatial resolution. Here, we introduce a widefield two-dimensional electronic spectroscopy microscope (2DESM) combining multidimensional coherent spectroscopy with widefield imaging, enabling simultaneous femtosecond temporal and micrometer spatial resolution across a broadband spectral range. Applying 2DESM to hBN-encapsulated WSe2, we directly visualize spatial variations in exciton coherence and relaxation associated with the local environment, establishing 2DESM as a powerful platform for probing many-body interactions, energy transport, and structure-function relationships in low-dimensional materials and devices.
Journal/Review: OPTICA
Volume: 13 (9) Pages from: 1861 to: 1870
More Information: Ministero dell’Università e della Ricerca (PRIN2020JLZ52N-003).KeyWords: Monolayer; Spectroscopy; Dynamics; Ws2; Photoluminescence; Emission; Excitons; Pulses; Layer; Mose2DOI: 10.1364/OPTICA.590834
