Generation of bright phase-matched circularly-polarized extreme ultraviolet high harmonics

TY - JOUR

T1 - Generation of bright phase-matched circularly-polarized extreme ultraviolet high harmonics

AU - Kfir, Ofer

AU - Grychtol, Patrik

AU - Turgut, Emrah

AU - Knut, Ronny

AU - Zusin, Dmitriy

AU - Popmintchev, Dimitar

AU - Popmintchev, Tenio

AU - Nembach, Hans

AU - Shaw, Justin M.

AU - Fleischer, Avner

AU - Kapteyn, Henry

AU - Murnane, Margaret

AU - Cohen, Oren

N1 - Publisher Copyright: © 2015 Macmillan Publishers Limited. All rights reserved.

PY - 2015/2/17

Y1 - 2015/2/17

N2 - Circularly-polarized extreme ultraviolet and X-ray radiation is useful for analysing the structural, electronic and magnetic properties of materials. To date, such radiation has only been available at large-scale X-ray facilities such as synchrotrons. Here, we demonstrate the first bright, phase-matched, extreme ultraviolet circularly-polarized high harmonics source. The harmonics are emitted when bi-chromatic counter-rotating circularly-polarized laser pulses field-ionize a gas in a hollow-core waveguide. We use this new light source for magnetic circular dichroism measurements at the M-shell absorption edges of Co. We show that phase-matching of circularly-polarized harmonics is unique and robust, producing a photon flux comparable to linearly polarized high harmonic sources. This work represents a critical advance towards the development of table-top systems for element-specific imaging and spectroscopy of multiple elements simultaneously in magnetic and other chiral media with very high spatial and temporal resolution.

AB - Circularly-polarized extreme ultraviolet and X-ray radiation is useful for analysing the structural, electronic and magnetic properties of materials. To date, such radiation has only been available at large-scale X-ray facilities such as synchrotrons. Here, we demonstrate the first bright, phase-matched, extreme ultraviolet circularly-polarized high harmonics source. The harmonics are emitted when bi-chromatic counter-rotating circularly-polarized laser pulses field-ionize a gas in a hollow-core waveguide. We use this new light source for magnetic circular dichroism measurements at the M-shell absorption edges of Co. We show that phase-matching of circularly-polarized harmonics is unique and robust, producing a photon flux comparable to linearly polarized high harmonic sources. This work represents a critical advance towards the development of table-top systems for element-specific imaging and spectroscopy of multiple elements simultaneously in magnetic and other chiral media with very high spatial and temporal resolution.

UR - http://www.scopus.com/inward/record.url?scp=84923130435&partnerID=8YFLogxK

U2 - 10.1038/nphoton.2014.293

DO - 10.1038/nphoton.2014.293

M3 - 文章

AN - SCOPUS:84923130435

SN - 1749-4885

VL - 9

SP - 99

EP - 105

JO - Nature Photonics

JF - Nature Photonics

IS - 2

ER -