Accelerating Ultrafast Spectroscopy with Compressive Sensing

Sushovit Adhikari, Cristian L. Cortes, Xiewen Wen, Shobhana Panuganti, David J. Gosztola, Richard D. Schaller, Gary P. Wiederrecht, Stephen K. Gray*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Ultrafast spectroscopy is an important tool for studying photoinduced dynamical processes in atoms, molecules, and nanostructures. Typically, the time to perform these experiments ranges from several minutes to hours depending on the choice of spectroscopic method. It is desirable to reduce this time overhead not only to shorten time and laboratory resources, but also to make it possible to examine fragile specimens that quickly degrade during long experiments. In this article, we motivate using compressive sensing to significantly shorten data acquisition time by reducing the total number of measurements in ultrafast spectroscopy. We apply this technique to experimental data from ultrafast transient absorption spectroscopy and ultrafast terahertz spectroscopy and show that good estimates can be obtained with as low as 15% of the total measurements, implying a sixfold reduction in the data acquisition time.

Original languageEnglish (US)
Article number024032
JournalPhysical Review Applied
Volume15
Issue number2
DOIs
StatePublished - Feb 2021

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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