title: Ultrashort optical pulse characterization using WS₂ monolayers.
abstract: We demonstrate the application of two-dimensional materials for ultrashort optical pulse characterization. Monolayer transition metal dichalcogenides, such as tungsten disulfide (WS₂), possess extraordinarily large second-order nonlinear susceptibility, and due to their atomic thickness, have relaxed phase-matching requirements and, hence, an inherently wide bandwidth. Synthesized monolayer WS₂ triangular islands were used to characterize ultrashort optical pulses at the focal point of an objective lens through second-harmonic generation collinear frequency-resolved optical gating.
authors.forename: Corey
authors.initials: C
authors.lastname: Janisch
authors.forename: Nikhil
authors.initials: N
authors.lastname: Mehta
authors.forename: Ding
authors.initials: D
authors.lastname: Ma
authors.forename: Ana Laura
authors.initials: AL
authors.lastname: Elías
authors.forename: Néstor
authors.initials: N
authors.lastname: Perea-López
authors.forename: Mauricio
authors.initials: M
authors.lastname: Terrones
authors.forename: Zhiwen
authors.initials: Z
authors.lastname: Liu