Oscillatory Energy Exchange Between Waves Coupled by a Dynamic Artificial Crystal

Abstract

We describe a general mechanism of controllable energy exchange between waves propagating in a dynamic artificial crystal. We show that if a spatial periodicity is temporarily imposed on the transmission properties of a wave-carrying medium whilst a wave is inside, this wave is coupled to a secondary counter-propagating wave and energy oscillates between the two. The oscillation frequency is determined by the width of the spectral band gap created by the periodicity and the frequency difference between the coupled waves. The effect is demonstrated with spin waves in a dynamic magnonic crystal.

5 pages, 4 figures

References in corpus (3)

• Scattering of backward spin waves in a one-dimensional magnonic crystal
• Current-controlled dynamic magnonic crystal
• Stopping and Time Reversal of Light in Dynamic Photonic Structures via Bloch Oscillations

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