Gallium nitride phononic integrated circuits platform for GHz frequency acoustic wave devices

Review Quantum Science & Technology

Piezoelectric Optomechanical Approaches for Efficient Quantum Microwave-to-Optical Signal Transduction: The Need for Co-Design

Krishna C. Balram et al.

Summary: Piezoelectric optomechanical platforms are a promising approach for quantum transduction between microwave and optical frequencies. The two main approaches, using 1D nanobeam optomechanical crystals and integrated bulk acoustic wave resonators, have different characteristics and challenges.

ADVANCED QUANTUM TECHNOLOGIES (2022)

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Article Physics, Applied

Gigahertz Phononic Integrated Circuits on Thin-Film Lithium Niobate on Sapphire

Felix M. Mayor et al.

Summary: Acoustic devices are crucial for classical information processing, offering compact and efficient elements for delaying, filtering, and storing electric signals. By controlling the propagation of phonons on a chip, larger-scale phononic circuits and systems can be enabled. This platform utilizes the piezoelectric effect in a thin film of lithium niobate on sapphire to excite guided acoustic waves, demonstrating efficient transducers and key building blocks for applications such as sensing.

PHYSICAL REVIEW APPLIED (2021)

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Article Multidisciplinary Sciences

Towards single-chip radiofrequency signal processing via acoustoelectric electron-phonon interactions

Lisa Hackett et al.

Summary: This study successfully integrates active, nonlinear, and nonreciprocal functionalities into passive piezoelectric acoustic wave technologies, laying the foundation for ultra-compact radiofrequency signal processors. Through heterogeneous integration, simultaneous optimization of piezoelectric-acoustic and electronic properties leads to the highest performing surface acoustic wave amplifiers and the first-ever demonstrated acoustoelectric circulator.

NATURE COMMUNICATIONS (2021)

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Article Physics, Applied