1. Robust temporal adiabatic passage with perfect frequency conversion between detuned acoustic cavities.
- Author
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Chen, Zhao-Xian, Peng, Yu-Gui, Chen, Ze-Guo, Liu, Yuan, Chen, Peng, Zhu, Xue-Feng, and Lu, Yan-Qing
- Subjects
FREQUENCY changers ,OPTICAL frequency conversion ,ENERGY transfer ,GAUSSIAN function ,LINEAR systems - Abstract
For classical waves, phase matching is vital for enabling efficient energy transfer in many scenarios, such as waveguide coupling and nonlinear optical frequency conversion. Here, we propose a temporal quasi-phase matching method and realize robust and complete acoustical energy transfer between arbitrarily detuned cavities. In a set of three cavities, A, B, and C, the time-varying coupling is established between adjacent elements. Analogy to the concept of stimulated Raman adiabatic passage, amplitudes of the two couplings are modulated as time-delayed Gaussian functions, and the couplings' signs are periodically flipped to eliminate temporal phase mismatching. As a result, robust and complete acoustic energy transfer from A to C is achieved. The non-reciprocal frequency conversion properties of our design are demonstrated. Our research takes a pivotal step towards expanding wave steering through time-dependent modulations and is promising to extend the frequency conversion based on state evolution in various linear Hermitian systems to nonlinear and non-Hermitian regimes. Phase matching is pivotal for realizing complete energy transfer for classical waves. Here, authors propose temporal quasi-phase matching method and realize robust and complete energy transfer between arbitrarily detuned acoustic cavities by combing the concept of stimulated Raman adiabatic passage. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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