Photo-actuated magneto-thermal nonreciprocal acoustic wave modulation in fluidic cavities

Qiaozhen Wang; Yuqi Jin; Zhiming Wang; Arup Neogi

doi:10.1117/12.3004352

13 March 2024 Photo-actuated magneto-thermal nonreciprocal acoustic wave modulation in fluidic cavities

Qiaozhen Wang, Yuqi Jin, Zhiming Wang, Arup Neogi

Proceedings Volume PC12889, Integrated Optics: Devices, Materials, and Technologies XXVIII; PC1288909 (2024) https://doi.org/10.1117/12.3004352
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

The splitting of the fundamental modes in a microcavity requires a strong coupling between light and matter and plays a significant role in quantum technology. A linear dynamic magnetoactive fluid cavity supporting ultrasonic waves is designed to enhance wave-matter interaction and induce splitting of resonant cavity-acoustic modes due to magneto-thermal and photothermal effects. The magneto-caloric force due to a temperature gradient within the cavity was used to realize a self-driven fluid cavity without an external mechanical pump. This force can be modulated remotely by a DC magnetic field or laser-induced surface-temperature change of the fluid within the cavity. An ultrasonic wave propagating through this cavity with moving fluid can be influenced by Doppler shift and rheological modifications leading to acoustic Zeeman-like splitting induced by external optical irradiation in the presence of a magnetic field. The laser-induced control of the fluid flow within the cavity enables the frequency and amplitude modulation of broadband ultrasonic waves traveling through the cavity leading to the nonreciprocal transmission of acoustic waves.

Conference Presentation

Citation Download Citation

Qiaozhen Wang, Yuqi Jin, Zhiming Wang, and Arup Neogi "Photo-actuated magneto-thermal nonreciprocal acoustic wave modulation in fluidic cavities", Proc. SPIE PC12889, Integrated Optics: Devices, Materials, and Technologies XXVIII, PC1288909 (13 March 2024); https://doi.org/10.1117/12.3004352

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