First characterization of coherent optical vortices from harmonic undulator radiation
We describe the experimental generation and measurement of coherent light that carries orbital angular momentum from a relativistic electron beam radiating at the second harmonic of a helical undulator. The measured helical phase of the light is shown to be in agreement with predictions of the sign...
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| Veröffentlicht in: | Physical review letters 2014-09, Vol.113 (13), p.134803-134803, Article 134803 |
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| container_end_page | 134803 |
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| container_issue | 13 |
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| container_title | Physical review letters |
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| creator | Hemsing, E Dunning, M Hast, C Raubenheimer, T Xiang, Dao |
| description | We describe the experimental generation and measurement of coherent light that carries orbital angular momentum from a relativistic electron beam radiating at the second harmonic of a helical undulator. The measured helical phase of the light is shown to be in agreement with predictions of the sign and magnitude of the phase singularity and is more than 2 orders of magnitude greater than the incoherent signal. Our setup demonstrates that such optical vortices can be produced in modern free-electron lasers in a simple afterburner arrangement for novel two-mode pump-probe experiments. |
| doi_str_mv | 10.1103/physrevlett.113.134803 |
| format | Article |
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| fulltext | fulltext |
| identifier | ISSN: 0031-9007 |
| ispartof | Physical review letters, 2014-09, Vol.113 (13), p.134803-134803, Article 134803 |
| issn | 0031-9007 1079-7114 |
| language | eng |
| recordid | cdi_osti_scitechconnect_1159892 |
| source | American Physical Society Journals |
| subjects | ACCPHY, XFEL Angular momentum Coherent light Fluid flow Free electron lasers Harmonics Helical Relativistic electron beams Vortices |
| title | First characterization of coherent optical vortices from harmonic undulator radiation |
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