Quantitative single-shot Supercontinuum-Enhanced Terahertz Spectroscopy (SETS)

Charan R. Nallapareddy and Thomas C. Underwood ()
Additional contact information
Charan R. Nallapareddy: The University of Texas at Austin
Thomas C. Underwood: The University of Texas at Austin

Nature Communications, 2025, vol. 16, issue 1, 1-11

Abstract: Abstract Single-shot terahertz (THz) spectroscopy probes sub-picosecond, non-repetitive events by combining the advantages of laser absorption with phase-sensitive interferometry. However, its usage as a quantitative tool is hindered by the chirp penalty of the spectral encoding scheme, where a narrow probe bandwidth distorts THz signals, limiting the bandwidth and spectral resolution of THz measurements. In this work, we introduce Supercontinuum-Enhanced Terahertz Spectroscopy (SETS), a method that leverages a broadband supercontinuum probe to overcome these challenges. SETS is shown to increase the usable bandwidth from 1.5 to 2.3 THz (based on the chirped pulse width and supercontinuum bandwidth), reduce signal distortion by 50%, and mitigate null frequencies. Experiments on argon plasma and water vapor, supported by modeling, show SETS enables simultaneous measurement of electron density, collision frequency, and absorption spectra. By mitigating core limitations of single-shot diagnostics, SETS offers a scalable path for quantitative, high-resolution measurements in dynamic, reactive media.

Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-025-60550-6 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-60550-6

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-025-60550-6

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().