Optical gratings in the collective interaction between radiation and atoms, including recoil and collisions
Anno: 2002
Autori: Perrin M., Lippi GL., Politi A.
Affiliazione autori: Institut Non Lineaire Nice, UMR 6618 CNRS, Univ. Nice-Sophia Antipolis, 1361 Route des Lucioles F-06560, Valbonne, France;
Istituto Nazionale di Ottica Appliocata, Largo E. Fermi 6, 50125 Firenze, Italy
Abstract: The introduction of collisions and of a thermal distribution for the atomic momentum in the model for the Collective Atomic Recoil Laser (CARL) is at the origin of important modifications in the interpretation of the mechanisms that give rise to the amplification of the backreflected wave. It is shown that the atomic density grating, considered to be the cause of gain in CARL, disappears in the presence of collisions, while other gratings-in population and polarization phase-survive. While the population grating appears to be merely a consequence of the collective interaction, the latter is the likely cause for the instability,. Finally, simulations show that models that make use of an exponential relaxation mechanism for the atomic momentum, rather than accounting for collisions explicitly, largely overestimate the strength of the interaction.
Giornale/Rivista: JOURNAL OF MODERN OPTICS
Volume: 49 (3-4) Da Pagina: 419 A: 429
Parole chiavi: INDUCED RESONANCES; 2-LEVEL ATOMS; AMPLIFICATIONDOI: 10.1080/09500340110087651Citazioni: 8dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-12Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui