Direct time-resolved plasma characterization with broadband terahertz light pulses

verfasst von

Virgilijus Vaičaitis, Ona Balachninaitė, Aidas Matijošius, Ihar Babushkin, Uwe Morgner

Abstract

We report here the results of comprehensive plasma characterization and diagnostics by analyzing time-resolved absorption spectra of short ultrabroadband (0.1-50 THz) pulses propagated through the test plasma. Spectral analysis of plasma-induced absorption of such THz pulses provides very direct, in situ, high dynamical range, potentially single-shot access to the plasma density, plasma decay time, electron temperature, and ballistic dynamics of the plasma expansion. We have demonstrated a proof-of-principle measurement of plasma created by an intense laser beam. In particular, we showed a reliable measurement of plasma densities from around 1016 to 1020cm-3. Apart from the plasma parameters, this method allowed us to reconstruct peak intensity inside the plasma spot and to observe a very early stage of plasma evolution after its excitation.

Organisationseinheit(en)

Institut für Quantenoptik
PhoenixD: Simulation, Fabrikation und Anwendung optischer Systeme

Externe Organisation(en)

Vilnius University
Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (MBI)

Typ

Artikel

Journal

Physical Review E

Band

107

Anzahl der Seiten

7

ISSN

2470-0045

Publikationsdatum

01.2023

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Statistische und nichtlineare Physik, Statistik und Wahrscheinlichkeit, Physik der kondensierten Materie

Elektronische Version(en)

https://doi.org/10.1103/PhysRevE.107.015201 (Zugang: Geschlossen)