Phys. Rev. Lett. 84, 5528–5531 (2000)

Observation of Phase-Matched Relativistic Harmonic Generation

Abstract

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S.-Y. Chen^1,*, A. Maksimchuk¹, E. Esarey², and D. Umstadter¹
¹Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109
²Center for Beam Physics, Ernest Orlando Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720

Received 2 July 1999; revised 21 March 2000; published in the issue dated 12 June 2000

See accompanying Physics Focus

Phase-matched relativistic harmonic generation in plasmas is observed for the first time. Third-harmonic light is detected and discriminated spectrally and angularly from the harmonics generated from competing processes. Its angular pattern is a narrow forward-directed cone, which is consistent with phase matching of a high-order transverse mode in a plasma. The signal level is found to be on the same order of magnitude for a circularly polarized pump pulse as for a linearly polarized pump pulse.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.84.5528

DOI:

10.1103/PhysRevLett.84.5528

PACS:

52.40.Nk, 41.60.-m, 42.65.Ky

^*Present address: Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei 106, Taiwan.

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Phys. Rev. Lett. 84, 5528–5531 (2000)

Observation of Phase-Matched Relativistic Harmonic Generation