Autor: Grujić, Z. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Laser Beam Profile Influence on Dark Hanle Resonances in Rb Vapor
Autorzy:: Krmpot, A.
Ćuk, S.
Nikolić, S.
Radonjić, M.
Grujić, Z.
Jelenković, B.
Tematy:: 32.70.Jz
42.50.Gy
42.62.Fi
32.30.Jc; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1791239.pdf Link otwiera się w nowym oknie
Opis:: Influence of two different laser beam profiles, the Gaussian and the Π (top hat) profile on the resonance line widths and amplitudes in the Hanle electromagnetically induced transparency was studied. The laser beam propagates through the vacuum Rb glass cell. Studies were done at $D_1$ line for the open $\text{}^{87}Rb:$ $F_{g}$=2 → $F_{e}$=1 transition. Hanle electromagnetically induced transparency was measured for the two beam profiles with the same total power and beam diameter and experimental results showed that Gaussian and the top hat profiles give different amplitudes and widths of the Hanle resonances. Resonances obtained from the top hat laser beam profile have lower amplitudes and higher line widths.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effect of Laser Light Ellipticity on Hanle Electromagnetically Induced Absorption Amplitude and Line Width
Autorzy:: Dimitrijević, J.
Grujić, Z.
Mijailović, M.
Arsenović, D.
Panić, B.
Jelenković, B.
Tematy:: 42.50.Gy
32.70.Jz; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1815474.pdf Link otwiera się w nowym oknie
Opis:: Using the $\text{}^2S_{1//2}$ $F_g$=2→$\text{}^2P_{3//2}$ $F_e$=3 transition in $\text{}^{87}Rb$, we analyzed the interaction between the arbitrarily polarized laser light and Zeeman sublevels in the Hanle configuration. We studied theoretically and confirmed experimentally that the effect of the laser light polarization on the electromagnetically induced absorption strongly depends on the laser light power. For the same atomic transition, and for single laser light power (3 mW), it was recently shown that electromagnetically induced absorption line widths increase with polarization ellipticity and that electromagnetically induced absorption amplitude has maximum for certain laser light polarization different than linear. Here, we present results for amplitudes and widths of electromagnetically induced absorption for different laser light polarizations and for the laser light power≤ 200μW. It is verified that for small laser light power maximal electromagnetically induced absorption amplitude is for the linear polarization, whereas for larger power maximum of the electromagnetically induced absorption is at higher polarization ellipticity.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Zeeman Coherences Narrowing due to Ramsey Effects Induced by Thermal Motion of Rubidium Atoms
Autorzy:: Grujić, Z.
Mijailović, M.
Panić, B.
Minić, M.
Kovačević, A.
Obradović, M.
Jelenković, B.
Cartaleva, S.
Tematy:: 42.50.Gy
32.70.Jz; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1814392.pdf Link otwiera się w nowym oknie
Opis:: We investigated effects of spatially separated laser fields on amplitudes and widths of electromagnetically induced transparency in M-type atomic system. We have shown narrowing of the electromagnetically induced transmission resonance and therefore enhancement of medium non-linearities that can be explained by diffusion-induced Ramsey narrowing. Depending on the polarization of two laser beams, narrow probe Hanle transmission resonance changes its sign in respect of the profile obtained when the pump laser beam is off.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: All-Optical Magnetometer Based on Resonant Excitation of Rubidium Atoms by Frequency Modulated Diode Laser Light
Autorzy:: Cartaleva, S.
Karaulanov, T.
Petrov, N.
Slavov, D.
Vaseva, K.
Yanev, A.
Mijailovic, M.
Grujic, Z.
Jelenkovic, B. M.
Tematy:: 42.50.Gy
07.55.Ge; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/2047842.pdf Link otwiera się w nowym oknie
Opis:: Magnetic field and its gradient measurements based on coherent population trapping resonances at the D$\text{}_{1}$ line of $\text{}^{87}$Rb are performed by means of coupling two ground-state Zeeman sublevels belonging to different hyperfine levels to a common excited state. Two coherent laser fields with frequency difference of 6.8 GHz are used. They are produced by direct current modulation of a diode laser. The resonance splitting and broadening caused by the applied magnetic field is measured by scanning the laser modulation frequency around the ground-state hyperfine frequency.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Characterization of the global network of optical magnetometers to search for exotic physics (GNOME)
Autorzy:: Palm, C. A.
Peng, X.
Grujić, Z. D.
Pustelny, Szymon
Nix, S.
Wickenbrock, A.
Stalnaker, J. E.
Smiga, J. A.
Wurm, D.
Budker, D.
Pankow, C.
Penaflor, A.
Padniuk, Mikhail
Masia-Roig, H.
DeCamp, G.
Guo, H.
Jackson Kimball, D. F.
Kornack, T. W.
Lebedev, V.
Scholtes, T.
Dumont, V.
Afach, S.
Weis, A.
Li, W.
Opis:: The Global Network of Optical Magnetometers to search for Exotic physics (GNOME) is a network of geographically separated, time-synchronized, optically pumped atomic magnetometers that is being used to search for correlated transient signals heralding exotic physics. The GNOME is sensitive to nuclear- and electron-spin couplings to exotic fields from astrophysical sources such as compact dark-matter objects (for example, axion stars and domain walls). Properties of the GNOME sensors such as sensitivity, bandwidth, and noise characteristics are studied in the present work, and features of the network’s operation (e.g., data acquisition, format, storage, and diagnostics) are described. Characterization of the GNOME is a key prerequisite to searches for and identification of exotic physics signatures.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Artykuł

na półce

Skocz do pozycji: 6.

Tytuł:: Highly stable atomic vector magnetometer based on free spin precession
Autorzy:: Chowdhuri, Z.
Lefort, T.
Piegsa, F. M.
Wursten, E.
Rawlik, M.
Kirch, K.
Severijns, N.
Rozpędzik, Dagmara
Naviliat-Cuncic, O.
Zejma, Jacek
Ban, G.
Bison, G.
Roccia, S.
Quemener, G.
Zsigmond, G.
Ries, D.
Komposch, S.
Mtchedlishvili, A.
Lemiere, Y.
Helaine, V.
Schmidt-Wellenburg, P.
Bodek, Kazimierz
Lauss, B.
Kasprzak, M.
Grujic, Z. D.
Koch, H. C.
Afach, S.
Wyszyński, Grzegorz
Kozela, A.
Prashanth, P. N.
Weis, A.
Krempel, J.
Hayen, L.
Knowles, P.
Opis:: We present a magnetometer based on optically pumped Cs atoms that measures the magnitude and direction of a 1 mu T magnetic field. Multiple circularly polarized laser beams were used to probe the free spin precession of the Cs atoms. The design was optimized for long-time stability and achieves a scalar resolution better than 300 fT for integration times ranging from 80 ms to 1000 s. The best scalar resolution of less than 80 fT was reached with integration times of 1.6 to 6 s. We were able to measure the magnetic field direction with a resolution better than 10 mu rad for integration times from 10 s up to 2000 s.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 7.

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Skocz do pozycji: 8.

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Skocz do pozycji: 9.

Inne

na półce

Skocz do pozycji: 10.

Tytuł:: A device for simultaneous spin analysis of ultracold neutrons
Autorzy:: Chowdhuri, Z.
Lefort, T.
Wursten, E.
Daum, M.
Rawlik, M.
Kirch, K.
Rebreyend, D.
Franke, B.
Severijns, N.
Halaine, V.
Rozpędzik, Dagmara
Rocchia, S.
Naviliat-Cuncic, O.
Zejma, Jacek
Ban, G.
Kermaidic, Y.
Bison, G.
Fertl, M.
Henneck, R.
Quemener, G.
Zsigmond, G.
Ries, D.
Komposch, S.
Mtchedlishvili, A.
Lemiere, Y.
Pignol, G.
Geltenbort, P.
Kazprzak, M.
Prashant, P. N.
Schmidt-Wellenburg, P.
Bodek, Kazimierz
Lauss, B.
Grujic, Z. D.
Afach, S.
Wyszyński, Grzegorz
Kozela, A.
Piegsa, F.
Weis, A.
Krempel, J.
Hayen, L.
Opis:: We report on the design and first tests of a device allowing for measurement of ultracold neutrons polarisation by means of the simultaneous analysis of the two spin components. The device was developed in the framework of the neutron electric dipole moment experiment at the Paul Scherrer Institute. Individual parts and the entire newly built system have been characterised with ultracold neutrons. The gain in statistical sensitivity obtained with the simultaneous spin analyser is (18.2 $\pm$ 6.1)% relative to the former sequential analyser under nominal running conditions.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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