Regensburg 2025 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 29: Poster II

HL 29.91: Poster

Tuesday, March 18, 2025, 18:00–20:00, P1

Detection Strategies for Highspeed Impulsive Stimulated Raman Scattering — •Laura Hüllmandel, Julia Lang, and Georg Herink — Universität Bayreuth

Impulsive stimulated Raman scattering is an established method for resolving transient coherent superpositions of optical phonons in matter. Inside a laser cavity, however, this nonlinear interaction between multiple ultrashort temporal solitons can accumulate and determine their trajectories [1]. In this contribution, we study different regimes of the coupling between solitons via optical phonons. Based on extra-cavity spectroscopic experiments on crystalline media, we compare interferometric and spectrally-resolved sampling modes and, in particular, we discuss practical aspects in enhancing Raman signal quality. These new insights contribute to the understanding of phonon-driven soliton coupling and the development of time-domain intra-cavity Raman spectroscopy.

[1] A. Völkel et al., "Intracavity Raman Scattering Couples Soliton Molecules with Terahertz Phonons.", Nature Communications 13.1 (2022).

Keywords: Raman Scattering; Impulsive Stimulated Raman Scattering; Soliton Molecules