Nonreciprocity in the behavior of photon echo in constant and pulsed magnetic fields in YLiF4: Er3+ and LuLiF4: Er3+ crystals

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Abstract

Studying the influence of nanosecond pulsed magnetic fields on the behavior of the photon echo in YLiF4: Er3+ and LuLiF4: Er3+ samples, it was found that the effect of the pulsed field strongly depends on the magnitude and direction of change of the constant magnetic field. An unexpected increase in the intensity of the photon echo is observed when two identical magnetic pulses are turned on, one after the first laser pulse, the second after the second laser pulse.

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About the authors

А. M. Shegeda

Federal Research Center “Kazan Scientific Center of the Russian Academy of Sciences”

Author for correspondence.
Email: shegedaam@gmail.com

Zavoisky Physical-Technical Institute

Russian Federation, Kazan

S. L. Korableva

Kazan (Volga region) Federal University

Email: shegedaam@gmail.com
Russian Federation, Kazan

O. А. Morozov

Federal Research Center “Kazan Scientific Center of the Russian Academy of Sciences”

Email: shegedaam@gmail.com

Zavoisky Physical-Technical Institute

Kazan

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2. Fig. 1. Dependence I(h) of the PE intensity on the amplitude h of the pulsed magnetic field with a duration of 34 ns, switched on after the first laser pulse (black squares). Here, for comparison, the red circles show the oscillations of the echo intensity when →h || →C [8] (a). On the right (b), the black squares show how the relative PE intensity changes depending on the time t of switching on the MI. The solid line at the bottom shows the oscillogram of the observed signals. At the top, the circles show the 34 ns MI switched on simultaneously with the second laser pulse.

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3. Fig. 2. Relative change in the PE intensity in the YLiF4:Er3+ sample depending on the magnitude and direction of magnetic field scanning →H. MI with an amplitude of h = 8 Oe and a duration of τh = 40 ns is switched on after the first laser pulse. Black dots show I/I0 when H changes from –900 Oe to +900 Oe, red squares show when H changes from +900 Oe to – 900 Oe. The inset on the bottom right shows the I/I0 dependences near H = 0.

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4. Fig. 3. Relative change in the PE intensity in the YLiF4:Er3+ sample depending on the magnitude and scanning direction of the magnetic field H when turning on two identical MIs with an amplitude of h = 8 Oe and a duration of τh = 40 ns. The first MI is turned on after the first laser pulse, the second MI - after the second laser pulse. Black dots show I/I0 when H changes from - 900 to + 900 Oe, red squares - when H changes from + 900 to - 900 Oe. The inset on the upper right shows the I/I0 dependences near H = 0.

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