Superradiant Thomson scattering from graphite in the extreme ultraviolet

被引：1

作者：

Fasolato, Claudia ^{[1
,2
]}

Stellino, Elena ^{[1
]}

Principi, Emiliano ^{[3
]}

Mincigrucci, Riccardo ^{[3
]}

Pelli-Cresi, Jacopo Stefano ^{[3
]}

Foglia, Laura ^{[3
]}

Postorino, Paolo ^{[4
]}

Sacchetti, Francesco ^{[1
,5
]}

Petrillo, Caterina ^{[1
,6
]}

机构：

[1] Univ Perugia, Dipartimento Fis & Geol, I-06123 Perugia, Italy

[2] Consiglio Nazl Ric CNRI SC, Ist Sistemi Complessi, I-00185 Rome, Italy

[3] Elettra Sincrotrone Trieste Soc Consortile Azioni, I-34149 Trieste, Italy

[4] Sapienza Univ Roma, Dipartimento Fis, I-00185 Rome, Italy

[5] CNR, Ist Officina Materiali, CNR IOM, I-06123 Perugia, Italy

[6] Area Sci Pk, I-34149 Trieste, Italy

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2024年 / 121卷 / 04期

关键词：

superradiant scattering; X-ray phonon scattering; free electron laser; FREE-ELECTRON LASER; X-RAY-SCATTERING; COHERENT; STATES;

D O I：

10.1073/pnas.2221293121

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We study the Thomson scattering from highly oriented pyrolitic graphite excited by the extreme ultraviolet, coherent pulses of FERMI free electron laser (FEL). An apparent nonlinear behavior is observed and fully described in terms of the coherent nature of both exciting FEL beam and scattered radiation, producing an intensity-dependent enhancement of the Thomson scattering cross-section. The process resembles Dicke's superradiant phenomenon and is thus interpreted as the observation of superradiant Thomson scattering. The process also triggers the creation of coherent, low-q (< 0.3 & Aring;(-1)), low energy phonons. The experimental data and analysis provide quantitative information on the sample characteristics, absorption, scattering factor, and coherent phonon energies and populations and open the route for the investigation of the deep nature of complex materials.

引用

页数：7

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