Phase-Controlled Pathway Interferences and Switchable Fast-Slow Light in a Cavity-Magnon Polariton System

Abstract

We study the phase-controlled transmission properties in a compound system consisting of a threedimensional copper cavity and an yttrium-iron-garnet (YIG) sphere. By tuning the relative phase of the magnon pumping and cavity-probe tones, constructive and destructive interferences occur periodically, which strongly modify both the cavity-field transmission spectra and the group delay of light. Moreover, the tunable amplitude ratio between pump-probe tones allows us to further improve the signal absorption or amplification, accompanied by either significantly enhanced optical advance or delay. Both the phase and amplitude ratio can be used to realize in situ tunable and switchable fast-slow light. The tunable phase and amplitude ratio lead to the zero reflection of the transmitted light and an abrupt fast-slow light transition. Our results confirm that direct magnon pumping through the coupling loops provides a versatile route to achieve controllable signal transmission, storage, and communication, which can be further expanded to the quantum regime, realizing coherent-state processing or quantum-limited precise measurements.

Dynamical Backaction Magnomechanics

“…Furthermore, an important triple-resonance condition is possible, where the phonon frequency matches the difference in frequencies between the hybrid cavity-magnon modes [22], allowing selective cavity enhancement of scattering processes. This triple-resonance system has sparked significant interest, resulting in theoretical proposals for the generation of non-classical entangled states [23][24][25][26][27][28], squeezed states [29][30][31], classical and quantum information processing [32][33][34][35][36], quantum correlation thermometry [37], and exploring PT -symmetry [38][39][40][41]. Many of these proposals rely on the ability of the external drive to act on the mechanical motion, so called dynamical backaction.…”

Static synthetic gauge field control of double optomechanically induced transparency in a closed-contour interaction scheme

“…This work was extended to reconfigurable nonreciprocal transmission between two microwave modes [21] and nonreciprocal enhancement of second-order sidebands [22]. In a cavity-magnon system that utilizes pathway interference, switching between fast and slow light transmission has been proposed [23] and experimentally achieved by tuning the relative phase of the magnon pumping and cavity probe [24]. Other important progress has been brought about by parity-time (PT )-symmetric photonic concepts that widen the * bulutay@fen.bilkent.edu.tr range of opportunities [25,26].…”

Static synthetic gauge field control of double optomechanically induced transparency in a closed-contour interaction scheme

“…This has been extended to nonreciprocal enhancement of secondorder sidebands [19]. In a cavity-magnon system that utilizes pathway interference, switching between fast and slow light transmission has been experimentally achieved by tuning the relative phase of the magnon pumping and cavity-probe [20]. Another important progress has been brought by PT -symmetric photonics concepts that widens the range of opportunities [21,22].…”