Electro-optic polymer and silicon nitride hybrid spatial light modulators based on a metasurface

Area of Science:

• Photonics and Optical Engineering
• Materials Science
• Electrical Engineering

Background:

• Spatial light modulators (SLMs) are crucial components in diverse photonic applications including near-infrared imaging, beam steering, and optical communication.
• Existing commercial SLMs are constrained by modulation speeds, typically limited to kilohertz frequencies, hindering progress in high-speed optical systems.

Purpose of the Study:

• To overcome the speed limitations of current SLMs by developing a novel device capable of significantly higher modulation frequencies.
• To demonstrate a new hybrid electro-optic (EO) polymer and silicon nitride SLM architecture for high-speed optical modulation.

Main Methods:

• Designed a specialized metasurface to enhance optical resonance quality and confine light within the active electro-optic polymer layer.
• Integrated the metasurface with an electro-optic polymer and silicon nitride to create a hybrid SLM.
• Characterized the device's modulation performance, focusing on speed and driving voltage requirements.

Main Results:

• Achieved clear optical modulation at a significant speed of 10 MHz.
• Demonstrated the device's operation with a low driving voltage of Vp-p=±10 V.
• The proof-of-concept device highlights the potential of this hybrid approach for high-performance SLMs.

Conclusions:

• The developed electro-optic polymer and silicon nitride hybrid SLM represents a substantial advancement in modulation speed.
• This technology offers a promising pathway towards compact SLMs capable of radio frequency (RF) modulation exceeding 100 GHz.
• Further optimization of the first-generation device is expected to unlock even greater performance for future photonic systems.