Photodetachment of surface atoms of metals

Bonch-Bruevich, A. M.; Vartanyan, T. A.; Przhibel’skiĭ, S. G.; Khromov, V. V.

doi:10.1070/pu1998v041n08abeh000435

Cited by 10 publications

(11 citation statements)

References 1 publication

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“…Sunlight irradiating the silicates present on the Moon's surface creates a significant sodium and potassium vapor in its tenuous atmosphere, causing the Moon to glow due to emission from the same vapor [9]. Optically induced desorption studies have been performed on small sodium clusters [10], sapphire [11] and SiO 2 [12] surfaces, as well as thin organic films [3,7,[13][14][15]. Our measurements on atomic sodium use a MOT to probe PSD, and they may open up the possibility of using laser cooling techniques for chemical identification of lunar samples.…”

Section: Introductionmentioning

confidence: 99%

Light-induced atomic desorption for loading a sodium magneto-optical trap

et al. 2010

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We report studies of photon-stimulated desorption, also known as light-induced atomic desorption, of sodium atoms from a vacuum-cell glass surface used for loading a magneto-optical trap (MOT). Fluorescence detection was used to record the trapped atom number and the desorption rate. We observed a steep wavelength dependence of the desorption process above 2.6 eV photon energy, a result significant for estimations of sodium vapor density in the lunar atmosphere. Our data fit well to a simple model for the loading of the MOT dependent only on the sodium desorption rate and residual gas density. Up to 3.7 × 10 7 Na atoms were confined under ultrahigh-vacuum conditions, creating promising loading conditions for a vapor-cell-based atomic Bose-Einstein condensate of sodium.

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Section: Introductionmentioning

confidence: 99%

Light-induced atomic desorption for loading a sodium magneto-optical trap

et al. 2010

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“…When these cells are then exposed to light of sufficiently short wavelength, alkali atoms are desorbed from the paraffin coating into the volume of the cell [24]. This phenomenon, known as light-induced atomic desorption (LIAD), has been observed using a wide range of surfaces: sapphire [40,41,42], silane-coated glass (in particular polydimethylsiloxane) [43,44,45,46,47], superfluid 4 He films [48,49], quartz [50], and porous silica [51]. LIAD is useful as a method for the rapid control of atomic density, and is of particular interest in the development of miniaturized atomic clocks and magnetometers [16].…”

Section: Relaxation Of Atomic Polarization In the Presence Of LImentioning

confidence: 99%

Relaxation of atomic polarization in paraffin-coated cesium vapor cells

et al. 2005

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The relaxation of atomic polarization in buffer-gas-free, paraffin-coated cesium vapor cells is studied using a variation on Franzen's technique of "relaxation in the dark" [Franzen, Phys. Rev. 115, 850 (1959)]. In the present experiment, narrow-band, circularly polarized pump light, resonant with the Cs D2 transition, orients atoms along a longitudinal magnetic field, and time-dependent optical rotation of linearly polarized probe light is measured to determine the relaxation rates of the atomic orientation of a particular hyperfine level. The change in relaxation rates during lightinduced atomic desorption (LIAD) is studied. No significant change in the spin relaxation rate during LIAD is found beyond that expected from the faster rate of spin-exchange collisions due to the increase in Cs density.

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“…1) have been predicted and observed in radio frequency [8] and optical [15,16] fields. A new physical phenomenon -the appearance of narrow resonance in the center of the absorption curve ( Fig.…”

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confidence: 90%

“…Initial and subsequent works in this area indicate that the system presents qualitatively new types of spectral [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] and dynamical [22][23][24][25][26][27] behavior compared with the monochromatic excitation. The main activity has been concentrated on spectral peculiarities connected with subharmonic resonances [8]. Dynamical properties of the system have received much less attention.…”

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confidence: 99%

Revivals for a two-level atom in a free space under bichromatic excitation

Kilin

Karlovich

2004

Laser Phys. Lett.

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A two level atom in a free space excited by a bichromatic symmetrical field is shown to display the property of revivals for relatively small frequency detunings and a large driving field amplitude. The property of revivals is a bright physical phenomenon which is usually associated with the quantum properties of an atom-field interactions in the framework of the Jaynes-Cummings model [1]. In fact this phenomenon predicted in [2] has been observed by Herbert Walther with coworkers in 1987 [3] for a single two-level atom interacting with a quantized field mode in a high-Q cavity. Mathematically the revivals arise as a result of the quasi-equidistant spectrum of the Jaynes-Cummings Hamiltonian for a large number of photons in the mode and the peak-like form of the Fourier spectrum of atomic and field variables at the initial coherent state for the field mode. But it is obvious that there are other physical systems with the same spectral properties, and therefore they can exhibit revivals too. As we show in this Letter one of such systems is a bichromatically driven two-level atom in a free space, and what's more, the driving field is classical.The problem of bichromatically driven two-level atom dynamics and spectra has received considerable attention since the 70's. Initial and subsequent works in this area indicate that the system presents qualitatively new types of spectral [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] and dynamical [22][23][24][25][26][27] behavior compared with the monochromatic excitation. The main activity has been concentrated on spectral peculiarities connected with subharmonic resonances [8]. Dynamical properties of the system have received much less attention. For example, it has been predicted [22,23] and observed [27] that bichromatically driven atoms exhibit dynamical behavior that's strongly dependent on the relative phase of the excitation field components.In this Letter, we report a new type of dynamical behavior of a bichromatically driven two-level atom which can be observed for the special case wherein the field components have very small frequency detunings from atomic resonance and the intensities of both components are strong enough. For this case many spectral components of the atomic variables are exited with a definite phase relations between them. As a result, synchronization (in other terminology, constructive interference) between the components occurs at definite moments, giving the revivals in the temporal behavior of the atomic variables.Let a two-level atom driven by a bichromatic coherent field with amplitudeinteract with a continuum of electromagnetic free field modes which are in the vacuum state. The atom also interacts with a relaxation bath that leads to an additional dephasing of the atomic polarization. We restrict ourselves to the simplest case of bichromatic excitation -with equal amplitudes of the field components (E 1 = E 2 = E 0 ) and symmetrically located field frequencies ω 1 − ω 21 = ω 21 − ω 2 = , where ω 21 is the ato...

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Photodetachment of surface atoms of metals

Cited by 10 publications

References 1 publication

Light-induced atomic desorption for loading a sodium magneto-optical trap

Light-induced atomic desorption for loading a sodium magneto-optical trap

Relaxation of atomic polarization in paraffin-coated cesium vapor cells

Revivals for a two-level atom in a free space under bichromatic excitation

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