Open AccessLeveraging scatter in two-dimensional spectroscopy: passive phase drift correction enables a global phasing protocol
Author(s) -
Lawson T. Lloyd,
Ryan E. Wood,
Marco A. Allodi,
Siddhartha Sohoni,
Jacob S. Higgins,
John P. Otto,
Gregory S. Engel
Publication year - 2020
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.404601
Subject(s) - optics , interferometry , phase (matter) , fourier transform , pulse shaping , signal (programming language) , signal processing , physics , computer science , laser , digital signal processing , quantum mechanics , computer hardware , programming language
Phase stability between pulse pairs defining Fourier-transform time delays can limit resolution and complicates development and adoption of multidimensional coherent spectroscopies. We demonstrate a data processing procedure to correct the long-term phase drift of the nonlinear signal during two-dimensional (2D) experiments based on the relative phase between scattered excitation pulses and a global phasing procedure to generate fully absorptive 2D electronic spectra of wafer-scale monolayer MoS 2 . Our correction results in a ∼30-fold increase in effective long-term signal phase stability, from ∼λ/2 to ∼λ/70 with negligible extra experimental time and no additional optical components. This scatter-based drift correction should be applicable to other interferometric techniques as well, significantly lowering the practical experimental requirements for this class of measurements.