High-efficiency triple-resonant inelastic light scattering in planar optomagnonic cavities

Abstract

Optomagnonic cavities have recently been emerging as promising candidates for implementing coherent photon-magnon interactions, for applications in quantum memories and devices, and next generation quantum networks. A key challenge in the design of such cavities is the attainment of high magnon-mediated optical-to-optical conversion efficiencies, which could, e.g., be exploited for efficient optical interfacing of superconducting qubits, as well as the practicality of the final designs, which ideally should be planar and amenable to on-chip integration. Here, on the basis of a novel time-Floquet scattering-matrix approach, we report on the design and optimization of a planar, multilayer optomagnonic cavity, incorporating a cerium-substituted yttrium iron garnet thin film, magnetized in-plane, and operating in the triple-resonant inelastic light scattering regime. This architecture allows for magnon-mediated optical-to-optical conversion efficiencies of about 5% under realistic conditions, which is orders of magnitude higher than that attained in alternative optomagnonic designs. Our results suggest a viable way forward for realizing practical information inter-conversion, with high efficiencies, between microwaves, strongly coupled to magnons, and optical photons, as well as a platform for fundamental studies of classical and quantum dynamics in magnetic solids and for the implementation of futuristic quantum devices.

Cavity magnonics

“…(b) The reduced mode volume in cylindrical and disk-shaped YIG samples can achieve higher magneto-optical coupling and support different magnetic textures [51]. (c) Photonic crystals can confine the optical field [282], also in narrow-band optical isolators [283] (d). (e) Compact optical isolator with magnetic elements based on a silicon photonic ''racetrack'' resonator [284].…”

Optomagnonically induced RoF chaotic synchronization

“…Optomagnonics enable strong interactions between optical photons and microwave magnons [1][2][3][4][5][6][7][8][9][10][11]. Millimeter-scale yttrium-iron-garnet (YIG, Y 3 Fe 5 O 12 ) resonators [1,5,9,12] that can support the optical whispering gallery mode (WGM) [13][14][15][16] and magnon mode are optomagnonic materials with excellent optical and magnetic parameters.…”

Waveguide cavity optomagnonics for microwave-to-optics conversion

“…YIG exhibits very low dissipation for all these information carriers and in particular, as an optical material, it shows very low optical loss in the telecom c-band (0.13 dB/cm) [30]. Because of these advantages, the feasibility of using single crystalline YIG for realizing microwave-to-optical conversion is of significant interest [22,[31][32][33][34][35][36]. However, previous studies in this area mainly focused on bulk crystals with the uniform magnon mode (Kittel mode) [37], resulting in the low magneto-optical interaction strength and limited conversion bandwidth [18-21, 26, 38].…”