Ultrafast nanooptics

Physics and applications of a novel nanometer-sized femtosecond electron source (Lienau, Ropers)

The aim of this project is to explore the microscopic physical properties and possible applications of a novel ultrafast electron source based on field enhancement at the apex of sharp metal tips. We have recently demonstrated that a fairly intense and spatially highly localized beam of electrons can be generated when focusing sub-10 fs laser pulses from a Ti:Sapphire oscillator to the apex of gold or tungsten tips. This source carries significant potential for applications in ultrafast electron microscopy and/or diffraction.


Publications

Ultrasmall bullets of light – Focusing few-cycle light pulses to the diffraction limit
B. Piglosiewicz, D. Sadiq, M. Maschek, S. Schmidt, P. Vasa, and C. Lienau
Optics Express 19 (2011) 14451
Superfocusing of electric or magnetic fields using conical metal tips: effect of mode symmetry on the plasmon excitation method
J. S. Lee, S. Han, J. Shirdel, S. Koo, D. Sadiq, C. Lienau, and N. Park
Optics Express 19 (2011) 12347
Strong-field photoemission from surfaces: Theoretical approaches
S. V. Yalunin, M. Gulde, and C. Ropers
Phys. Rev. B 84 (2011) 195426
Adiabatic Nanofocusing Scattering-Type Optical Nanoscopy of Individual Gold Nanoparticles
D. Sadiq, J. Shirdel, J. S. Lee, E. Selishcheva, N. Park, and C. Lienau
Nano Letters 11 (2011) 1609
Tip-enhanced strong-field photoemission
R. Bormann, M. Gulde, A. Weismann, S. Y. Yalunin, and C. Ropers
Phys. Rev. Lett. 105 (2010) 147601
Ultrafast Nano-Optics
P.Vasa, C. Ropers, R. Pomraenke and C. Lienau
Laser & Photon. Rev. 3 (2009) 1
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