Controllable multichannel acousto-optic modulator and frequency synthesizer enabled by nonlinear MEMS resonator.

Area of Science:

• Nonlinear physics
• Microelectromechanical Systems (MEMS)
• Photonics

Background:

• Nonlinear physics-based harmonic generators and modulators are crucial for optical and electrical communication.
• Existing technologies like optical modulators and frequency synthesizers have limitations in multi-channel functionality, output control, and operational requirements (vacuum, complex setup, high power).

Purpose of the Study:

• To report a Microelectromechanical System (MEMS) based signal processing unit capable of simultaneous multi-channel generation in both frequency and spatial domains.
• To demonstrate a device that overcomes the limitations of current signal processing technologies.

Main Methods:

• Utilizing a piezoelectrically actuated nonlinear Microelectromechanical System (MEMS).
• Leveraging the combined electromechanical and material nonlinearity of Lead Zirconate Titanate thin film.
• Operating the device in an ambient environment at Complementary-Metal-Oxide-Semiconductor compatible voltages.
• Electrically detuning the operation point along the nonlinear regime of the resonator to control signal generation based on higher-order non-Eigen modes.

Main Results:

• Simultaneous generation of over 100 programmable parallel information channels in both frequency and spatial domains.
• Achieved through the nonlinear properties of the Lead Zirconate Titanate thin film.
• Device operates in ambient conditions with low, compatible voltages.
• Tunable multichannel generation is demonstrated by controlling the operation point.

Conclusions:

• The developed tunable multichannel microdevice offers a significant advancement in signal processing.
• It presents a potential solution for Radio Frequency communication and quantum photonics.
• The device's MEMS-photonics monolithic integration ability makes it highly attractive for future applications.