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Laser-induced quantum adsorption of neutral atoms in dielectric surfaces

Thierry Passerat de Silans, B. Farias, Marcos Oriá +1 more

Applied Physics BNov 4, 200519 citations

Laser-heating of a transparent crystal via adsorbed atoms

Sander van Smaalen, Henk F. Arnoldus, Thomas F. Atoms

A coated surface of a crystal is irradiated by intense infrared light. The optically active atomic bonds absorb photons from the laser field, and the subsequent spontaneous decay goes together with emissions of phonons into the crystal. This photon phonon conversion results in an energy flux into the crystal. An equation for this flux is derived from the master equation for the level populations of the dressed atomic states. The saturation limit is discussed, and the general theory is illustrated with two examples. Furthermore, it is outlined with qualitative arguments that quantum yield of photodesorption is not sensitive to the laser power. Keywords: Laser heating; Transparent crystal; VIA Adsorbed atoms; Photon phonon conversion; Master equation; photodesorption.A coated surface of a crystal is irradiated by intense infrared light. The optically active atomic bonds absorb photons from the laser field, and the subsequent spontaneous decay goes together with emissions of phonons into the crystal. This photon phonon conversion results in an energy flux into the crystal. An equation for this flux is derived from the master equation for the level populations of the dressed atomic states. The saturation limit is discussed, and the general theory is illustrated with two examples. Furthermore, it is outlined with qualitative arguments that quantum yield of photodesorption is not sensitive to the laser power. Keywords: Laser heating; Transparent crystal; VIA Adsorbed atoms; Photon phonon conversion; Master equation; photodesorption.

Unknown eBooksOct 1, 19860 citations

Trapping of atoms in the near field of laser light

В. В. Климов, Vladilen S Letokhov

ZhETF Pisma RedaktsiiuJan 1, 19950 citations

Ultralow-power local laser control of the dimer density in alkali-metal vapors through photodesorption

Pankaj K. Jha, Konstantin E. Dorfman, Zhenhuan Yi +6 more

Ultralow-power diode-laser radiation is employed to induce photodesorption of cesium from a partially transparent thin-film cesium adsorbate on a solid surface. Using resonant Raman spectroscopy, we demonstrate that this photodesorption process enables an accurate local optical control of the density of dimer molecules in alkali-metal vapors.

arXiv:1112.4115Applied Physics LettersAug 27, 20123 citations

Optical stabilization of Rb vapor density above thermal equilibrium

A. Burchianti, Andrea Bogi, C. Marinelli +2 more

We stabilize the Rb vapor density above its thermal equilibrium value in sealed glass cells, which are generally used in atomic physics experiments. The method relies on light-induced desorption of Rb atoms from dielectric surfaces. The process does not demand high light intensities so that LEDs or laser diodes can be used as desorbing sources. The experiments are carried out in Pyrex cells either coated with a polydimethylsiloxane film or containing a porous glass sample. Under illumination both the organic coating and the porous sample release a large amount of Rb atoms into the cell volume. We show that the Rb vapor density can be maintained to a preset value, using a desorbing light intensity controlled by a feedback signal given by the Rb absorption or fluorescence level. Moreover, we find that the stabilization technique does not depend on the microscopic mechanisms underlying photodesorption.We stabilize the Rb vapor density above its thermal equilibrium value in sealed glass cells, which are generally used in atomic physics experiments. The method relies on light-induced desorption of Rb atoms from dielectric surfaces. The process does not demand high light intensities so that LEDs or laser diodes can be used as desorbing sources. The experiments are carried out in Pyrex cells either coated with a polydimethylsiloxane film or containing a porous glass sample. Under illumination both the organic coating and the porous sample release a large amount of Rb atoms into the cell volume. We show that the Rb vapor density can be maintained to a preset value, using a desorbing light intensity controlled by a feedback signal given by the Rb absorption or fluorescence level. Moreover, we find that the stabilization technique does not depend on the microscopic mechanisms underlying photodesorption.

Journal of Modern OpticsFeb 10, 20105 citations

Cooling and trapping of atoms and molecules by a resonant laser field

Vladilen S Letokhov, Vladimir G. Minogin, B. D. Pavlik

Optics CommunicationsOct 1, 1976148 citations

Laser photodesorption of resonantly absorbing atoms from the surface of transparent dielectrics–microscopic mechanism of the process

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