Προσωπική Σελίδα : Α.Θ. † Γεώργας
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Μαθήματα |
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Σύντομο Βιογραφικό |
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ΕΙΔΙΚΟΤΗΤΑ: Θεωρητική Φυσική Laser, μη-Γραμμική και Κβαντική Οπτική. 1) Nonlinear Optics: resonant harmonic generation in metal vapors, pulse propagation and
coherent effects, stimulated Raman scattering of broadband laser fields in dispersive media. 2) Free Electron Lasers: high gain amplifiers with variable wigglers, spontaneous oscillator start-up and pulse evolution. 3) Resonant Multiphoton Processes in Atoms: multiphoton ionization and absorption, saturation, dynamic Stark effect, quantum beats, resonance fluorescence. 4) Stochastic Laser Fluctuations: effects in resonant nonlinear interaction of radiation with matter. 5) Laser-Metal Surface Interaction: multiphoton surface photoelectric effect, multiple harmonic
6) Surface plasmon-polaritons (SPPs): nonlinear excitation by four-wave mixing or difference-generation,surface electromagnetic fields, ultrafast (sub-20-fs) interferometric processes, dephasing times. frequency generation, parametric amplification of SPPs (current research interest).
.''Theory of nonlinear excitation of surface plasmon-polaritons by four wave mixing'', A.T. Georges, J. Opt. Soc. Am. B 28, 1603 (2011). .''Model for ultrafast harmonic generation from a gold surface: extraction of dephasing times for continuum-continuum transitions'',
N.E. Karatzas and A.T. Georges, J. Opt. Soc. Am. B 26, 2218 (2009). . “Modeling of ultrafast interferometric three-photon photoemission from a metal surface irradiated with sub-10-fs laser pulses”, A.T. Georges and N.E. Karatzas, Phys. Rev. B 77, 085436 (2008). · “Effects of electron relaxation on multiple harmonic generation from metal surfaces with femtosecond laser pulses”, N.E. Karatzas and A.T. Georges, Opt. Comm. 267, 498 (2006). · “Theory of multiple harmonic generation in reflection from a metal surface”, A.T. Georges and N.E. Karatzas, Appl. Phys. B 81, 479 (2005). · “High-order multiphoton photoelectric effect at midinfrared laser wavelengths”, A.T. Georges, Phys. Rev. A 66, 063412 (2002). · “Calculation of surface electromagnetic fields in laser-metal surface interaction”, Α.T. Georges, Opt. Commun. 188, 321 (2001). · “Coherent and incoherent multiple-harmonic generation from metal surfaces”, A.T. Georges, Phys. Rev. A 54, 2412 (1996). · “Dependence of broadband Raman amplification in dispersive media on the pump-Stokes input correlation”, A.T. Georges and S.N. Dixit, J. Opt. Soc. Am. B 8, 780 (1991). · “Statistical theory of Raman amplification and spontaneous generation in dispersive media pumped with a broadband laser”, A.T. Georges, Phys. Rev. A 39, 1876 (1989). · “Spontaneous start-up of a free-electron laser oscillator”, A.T. Georges, Phys. Rev. A 28, 3692 (1983). · “Resonance fluorescence in Markovian stochastic fields”, A.T. Georges, Phys. Rev. A 21, 2034 (1980). · “Aspects of resonant multi-photon processes”, A.T. Georges and P. Lambropoulos, in Advances in Electronics and Electron Physics, Academic Press, 1980), 54, p. 191-240. · “Saturation and Stark splitting in strong chaotic fields of arbitrary bandwidth”, A.T. Georges, P. Lambropoulos, and P. Zoller, Phys. Rev. Lett. 42, 1609 (1979).
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Ερευνητικά Ενδιαφέροντα |
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Lasers, Μη Γραμμικη και Κβαντικη Οπτικη |