Robust temporal adiabatic passage with perfect frequency conversion between detuned acoustic cavities

Zhao-Xian Chen, Yu-Gui Peng, Ze-Guo Chen (), Yuan Liu, Peng Chen, Xue-Feng Zhu () and Yan-Qing Lu ()
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Zhao-Xian Chen: Nanjing University
Yu-Gui Peng: Huazhong University of Science and Technology
Ze-Guo Chen: Nanjing University
Yuan Liu: Nanjing University
Peng Chen: Nanjing University
Xue-Feng Zhu: Huazhong University of Science and Technology
Yan-Qing Lu: Nanjing University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: 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.

Date: 2024
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DOI: 10.1038/s41467-024-45932-6

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