(Color online) Experimental configurations for the proposed PSK signal generators: a) uniform precession geometry and b) traveling wave geometry.
Simulation of magnetization dynamics excited by uniform pulsed field in YIG/GGG.
The quasi-uniform precession geometry. Possible forms of the control pulses for 1) suppression of spin ringing (the curves A and B) and 2) generation of PSK signal (curves C).
Experimental signals obtained in the quasi-uniform precession geometry. a) Magnetic oscillations with ≈ 200 ns lifetime formed by the leading and trailing edges of a control pulse and, b) and c) with overlapping control signals, one can control the number of oscillations to form a coded pulse.
The traveling wave configuration. The result of an LLG simulation on a spin-wave packet formed by the superposition of MSSWs excited by a 0.5 mm-wide microstrip line.
Experimental spin-wave packets recorded at different distances from the excitation electrode a) y = 3.5 mm, b) 11.5 mm, c) 19 mm, and d) 25 mm.
Experimental (-◊-) and calculated (-O-) spectra of the signals shown in Fig. 5. and Fig. 6(a).
Experimental (-□-) spin-wave packet delay vs the distance (y) from the input electrode, and experimental (-Δ-) and theoretical (LLG: -O-, Eq. (2): -◊-) delay vs H 0 at y = 10 mm.
a) Phase modulation of the precession achieved by two control pulses, resulting in a 4-bit BPSK sequence. The figure shows both unshifted and π-shifted signals in the 2nd and 4th bits; b) The 2nd bit was shifted by π/4, π/2, 3π/4, and π rad., with respect to the 1st bit, by varying τ.
(Color online) A schematic view of the correlator a) and its crossection b): angle β ≈ 3 deg.
a) Experimental input PSK signal formed by the spin-wave coder. b) Schematic representation of spin wave packets superposition (the experimental sets recorded by an oscilloscope). c) Output signal of the correlator.
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