Polarization-Analyzing CMOS Image Sensor With Monolithically Embedded Polarizer for Microchemistry Systems.

Area of Science:

• Optoelectronics
• Chemical Sensing
• Image Sensors

Background:

• Chiral analysis is crucial in various scientific fields.
• Existing methods for polarization measurement can be complex or lack real-time capabilities.
• Microchemistry systems require compact and efficient sensing solutions.

Purpose of the Study:

• To develop and demonstrate a polarization-analyzing CMOS sensor for chiral analysis.
• To integrate a monolithically embedded polarizer for real-time polarization angle measurement.
• To evaluate the sensor's performance in polarimetric measurements of chiral solutions.

Main Methods:

• Designed a CMOS image sensor with a monolithically embedded polarizer.
• Implemented embedded polarizers at different angles for absolute polarization angle measurement.
• Developed estimation schemes utilizing polarizer angle variation for real-time polarization measurement.
• Performed polarimetric measurements on chiral solutions.

Main Results:

• Achieved a promising performance for real-time polarization measurements using estimation schemes.
• Demonstrated an estimation accuracy of 0.04 degrees using 180 pixels in a 1-degree step.
• Successfully performed polarimetric measurements of chiral solutions.
• Confirmed the sensor's applicability to optical chiral analysis.

Conclusions:

• The developed CMOS sensor with an embedded polarizer shows significant potential for real-time optical chiral analysis.
• Estimation schemes overcome pixel-level limitations, enabling accurate polarization measurements.
• The sensor is a viable tool for microchemistry systems requiring precise chiral detection.