Generating Grating in Cavity Magnomechanics

TL;DR

This paper explores the creation of optical diffraction gratings in cavity magnomechanical systems through magnomechanically induced effects, analyzing how external control fields influence probe light transmission and diffraction patterns.

Contribution

It introduces the concept of magnomechanically induced grating (MMIG) in cavity systems and investigates how external standing waves modulate probe light diffraction, highlighting potential quantum information applications.

Findings

MMIG causes observable modifications in probe light transmission.

Diffraction intensities depend on magnon-phonon interactions and control field strength.

The system can generate various diffraction orders for potential quantum memory use.

Abstract

We investigate the phenomenon of magnomechanically induced grating (MMIG) within a cavity magnomechanical system, comprising magnons (spins in a ferromagnet, such as yttrium iron garnet), cavity microwave photons, and phonons [\textit{J. Li, S.-Y. Zhu, and G. S. Agarwal, Phys. Rev. Lett. \textbf{121}, 203601 (2018)}]. By applying an external standing wave control, we observe modifications in the transmission profile of a probe light beam, signifying the presence of MMIG. Through numerical analysis, we explore the diffraction intensities of the probe field, examining the impact of interactions between cavity magnons, magnon-phonon interactions, standing wave field strength, and interaction length. MMIG systems leverage the unique properties of magnons, and collective spin excitations with attributes like long coherence times and spin-wave propagation. These distinctive features can be harnessed in MMIG systems for innovative applications in information storage, retrieval, and quantum memories, offering various orders of diffraction grating.