X-Ray Second Harmonic Generation

X-Ray Second Harmonic Generation

We report clear experimental evidence for second harmonic generation at hard x-ray wavelengths. Using a 1.7 A pumping beam generated by a free electron laser, we observe second harmonic generation in diamond. The generated second harmonic is of order 10 times the background radiation, scales quadrat...

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Veröffentlicht in:Physical review letters 2015-04, Vol.112 (16)
Hauptverfasser: Shwartz, S, Fuchs, M, Hastings, J B, Inubushi, Y, Ishikawa, T, Katayama, T, Reis, D A, Sato, T, Tono, K, Yabashi, M, Yudovich, S, Harris, S E
Format: Artikel
Sprache:eng
Schlagworte:
Beams (radiation)
Crystals
Diamonds
Free electron lasers
Pumps
Second harmonic generation
Wavelengths
X-rays
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Zusammenfassung:We report clear experimental evidence for second harmonic generation at hard x-ray wavelengths. Using a 1.7 A pumping beam generated by a free electron laser, we observe second harmonic generation in diamond. The generated second harmonic is of order 10 times the background radiation, scales quadratically with pump pulse energy, and is generated over a narrow phase-matching condition. Of importance for future experiments, our results indicate that it is possible to observe nonlinear x-ray processes in crystals at pump intensities exceeding 10 super(16) W/cm super(2).
ISSN:0031-9007
1079-7114