Reaching the resolved tunnel regime for a femtosecond oscillator driven field emission electron source
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We report on electron emission from tungsten tips with the help of 800 nm-8 fs laser pulses from a Ti:sapphire laser oscillator. We have measured autocorrelation traces of the exciting laser pulse in the photoelectron current, which allows a measurement of the non-linearity as a function of DC voltage applied to the tip. These data are well described by a numerical integration of the one-dimensional Schrödinger equation. The simulation shows us that electron emission resolves the electric field structure of the driving laser pulse, a regime which is currently an extremely fruitful area of research with atoms in the gas phase. For an 8 fs laser pulse with the correct carrier-envelope phase setting the emission duration is as short as 800 nm.
PACS numbers78.47.+p 42.79.Hp 79.70.+q
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- 1.P. Hommelhoff, Y. Sortais, A. Aghajani-Talesh, and M. A. Kasevich, “Field Emission Tip as a Nanometer Source of Free Electron Femtosecond Pulses,” Phys. Rev. Lett. 96, 077401 (2006).Google Scholar
- 2.G. L. Yudin and M. Yu. Ivanov, “Nonadiabatic Tunnel Ionization: Looking inside a Laser Cycle,” Phys. Rev. A 64, 013409 (2001).Google Scholar
- 3.M. Uiberacker, T. Uphues, M. Schultze, A. J. Verhoef, V. Yakovlev, M. F. Kling, J. Rauschenberger, N. M. Kabachnik, H. Schroder, M. Lezius, K. L. Kompa, H. G. Muller, M. J. J. Vrakking, S. Hendel, U. Kleineberg, U. Heinzmann, M. Drescher, and F. Krausz, “Attosecond Real-Time Observation of Electron Tunnelling in Atoms,” Nature 446, 627 (2007); P. Colosimo, G. Doumy, C. I. Blaga, J. Wheeler, C. Hauri, F. Catoire, J. Tate, R. Chirla, A. M. March, G. G. Paulus, H. G. Muller, P. Agostini, and L. F. Dimauro, “Scaling Strong-Field Interactions towards the Classical Limit,” Nature Phys. 4 (5), 386 (2008).CrossRefADSGoogle Scholar
- 4.P. Hommelhoff, C. Kealhofer, and M. A. Kasevich, “Ultrafast Electron Pulses from a Tungsten Tip Triggered by Low-power Femtosecond Laser Pulses,” Phys. Rev. Lett. 97, 247402 (2006).Google Scholar
- 5.T. Ohwaki, H. Ishida, and A. Liebsch, “First-principles Calculation of Field Emission from Metal Surfaces,” Phys. Rev. B 68, 155422 (2003).Google Scholar
- 6.H. R. Reiss, “Inherent Contradictions in the Tunneling-Multiphoton Dichotomy,” Phys. Rev. A 75 031404 (2007).Google Scholar
- 7.T. Plettner, P. P. Lu, and R. L. Byer, “Proposed Few-Optical Cycle Laser-Driven Particle Accelerator Structure,” Phys. Rev. STAB 9, 111301 (2006).Google Scholar