Design and modeling of a graphene-based composite structure optical pressure sensor

Area of Science:

• Materials Science
• Optoelectronics
• Nanotechnology

Background:

• Optical pressure sensors offer non-intrusive measurement capabilities.
• Graphene's unique properties make it suitable for advanced sensor applications.
• Composite structures can enhance sensor performance and durability.

Purpose of the Study:

• To design and model a novel graphene-based composite structure optical pressure sensor.
• To optimize the sensor's structural and optical parameters for enhanced performance.
• To experimentally validate the sensor's sensitivity, stability, and detection limits.

Main Methods:

• Utilizing a PDMS (polydimethylsiloxane) force-sensitive structural mechanics model to optimize pyramid array dimensions.
• Employing a graphene waveguide optical model to determine optimal interference length, arm spacing, and core width.
• Fabricating and experimentally testing the designed graphene-based composite optical pressure sensor.

Main Results:

• The sensor exhibits a pressure sensitivity of 17.86 nm/kPa.
• The maximum detectable pressure is 3.40 kPa.
• Experimental results align with theoretical analysis, confirming design feasibility.

Conclusions:

• The developed graphene-based composite structure optical pressure sensor demonstrates high sensitivity and stability.
• The integrated modeling approach effectively optimizes sensor design for advanced performance.
• This work validates the feasibility of using graphene composites in optical pressure sensing applications.