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Complete Characterization of Phase and Amplitude of Bichromatic Extreme Ultraviolet Light

Here we demonstrate a method of determining the absolute phase between two wavelengths in a bichromatic XUV beam, as well as the coherent fraction of the relative intensity. The determination of phase is independent of the intensity of the two wavelengths. M. Di Fraia et al. Physical Review Letters 123, 213904 (2019)

Intense, mutually coherent beams of multiharmonic extreme ultraviolet light can now be created using seeded free-electron lasers, and the phase difference between harmonics can be tuned with attosecond accuracy. However, the absolute value of the phase is generally not determined. We present a method for determining precisely the absolute phase relationship of a fundamental wavelength and its second harmonic, as well as the amplitude ratio.

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Di Fraia Michele, Plekan Oksana, Callegari Carlo, Prince Kevin Charles, Giannessi Luca, Allaria Enrico, Badano Laura, De Ninno Giovanni, Trovo' Mauro, Diviacco Bruno, Gauthier David, Mirian Najmeh, Penco Giuseppe, Rebernik Ribic Primoz, Spampinati Simone, Spezzani Carlo, Gaio Giulio, Orimo Yuki, Tugs Oyunbileg, Saito Takeshi, Ishikawa Kenichi L., Carpeggiani Paolo Antonio, Csizmadia Tamas, Füle Miklós, Sansone Giuseppe, Maroju Praveen Kumar, D'Elia Alessandro, Mazza Tommaso, Meyer Michael, Gryzlova Elena V., Grum-Grzhimailo Alexei N., You Daehyun, Ueda Kiyoshi
Physical Review Letters 123, 213904 (2019)
doi: 10.1103/PhysRevLett.123.213904

Last Updated on Tuesday, 13 October 2020 16:00