Ultrafast Nonlinear Dynamics of Indium Tin Oxide Nanocrystals Probed via Fieldoscopy (Adv. Sci. 10/2026)

Fieldoscopy Scalable, ultrafast, and compact photonic switching platforms are vital for next-generation optical communication. Effective switches require high duty cycles, rapid recovery, strong modulation depth, and full reversibility. Using fieldoscopy, Hanieh Fattahi and co-workers resolve the sub-cycle switching dynamics of indium tin oxide colloidal nanocrystals and demonstrate their potential as ultrafast optical switches operating with terahertz-scale bandwidth. More details can be found in the Research Article (DOI: 10.1002/advs.202516818).