Journal Article

PUBDB-2026-00712

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Cavity Controls Core-to-Core Resonant Inelastic X-Ray Scattering

Wang, s.Extern*EMBL* ; Zhao, Z.Extern* ; Wang, X.Extern* ; Li, T.Extern* ; Su, Y.Extern* ; Uemura, Y.Extern*XFEL.EU* ; Lima, F. A. ; Khadiev, A.Extern*DESY* ; Wang, B.XFEL.EU*DESY* ; Ablett, J.Extern* ; Rueff, J.-P. ; Wang, H.Extern* ; Fox, J.Extern* ; LI, W.Extern*XFEL.EU* ; Zhu, L.Extern* ; Huang, X. (Corresponding author)XFEL.EU*

2026
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/z6xz-p7cm  doi:10.3204/PUBDB-2026-00712

Abstract: X-ray cavity quantum optics with inner-shell transitions has been limited by the spectral overlap between resonant and continuum states. Here, we report the first experimental demonstration of cavity-controlled core-to-core resonant inelastic x-ray scattering (RIXS). We suppress the absorption-edge effects by monitoring the RIXS profile, thereby resolving the resonant state from the overlapping continuum. We observe distinct cavity-induced energy shifts and cavity-enhanced decay rates in the 2⁢𝑝⁢3⁢𝑑RIXS spectra of WSi$_2$. These effects, manifesting as stretched or shifted profiles in the RIXS planes, enable novel spectroscopic applications via cavity-controlled core-hole states. Our results establish core-to-core RIXS as a powerful tool to manipulate inner-shell dynamics in x-ray cavities, offering new avenues for integrating quantum optical effects with x-ray spectroscopy.

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Contributing Institute(s):

1. PETRA-D (FS-PETRA-D)
2. FXE (XFEL_E1_FXE)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: I-20220927 (I-20220927) (I-20220927)

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2026

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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