Propagation of Non-Reciprocal Magnetostatic Surface Wave in a 20-nm-Thick Single Crystalline Yttrium Iron Garnet Film

Jeon, Hyung-Min; Brockdorf, Kathleen; Howe, B. M.; Myers, J.; Mou, Shin; Zhuang, Yan

doi:10.1109/led.2016.2638202

Cited by 1 publication

(1 citation statement)

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“…Another approach to produce non-reciprocal behavior is to apply an external symmetry breaking bias field. External magnetic field bias is commonly used [11][12][13][14] although similar symmetry breaking has been demonstrated in a linear acoustic device with a circulating fluid that creates an angular-momentum bias [15] and by using magneto-elastic coupling to create a gyrator [16]. Wang et al [17] demonstrated breaking time reversal symmetry using gyroscopic inertial effects that creates an apparent external force.…”

Section: Introductionmentioning

confidence: 99%

Nonreciprocal wave propagation and parametric amplification of bulk elastic waves in nonlinear anisotropic materials

et al. 2020

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Parametric amplification of an elastic wave and a framework for using elastic waves that could enable a new generation of high performance, low noise acoustic amplifiers, mixers and circulators are presented. Using a novel approach with nonlinear materials produces highly desirable non-reciprocal characteristics. Parametric amplification of a weak elastic signal wave is achieved by an elastic pump wave of higher intensity. By careful selection of material orientation together with precise excitation of signal and pump waves, 'up frequency conversion' is suppressed and selective amplification of the elastic signal wave occurs at its original frequency. In addition, a general mathematical framework is developed and used for analytical studies of coupled wave equations in nonlinear anisotropic materials. The results obtained from the analytical studies are verified using a finite element implementation.

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