Amplitude- and Phase-Programmable Dual-Color Photonic Chip for High-Contrast Structured Illumination Microscopy

Area of Science:

• Photonics
• Optical Microscopy
• Biomedical Imaging

Background:

• Advanced optical microscopy, like structured illumination microscopy (SIM), requires complex illumination setups.
• Integrated optics offer compact, stable, and easily alignable solutions for light manipulation.

Purpose of the Study:

• To present an integrated photonic device for generating structured illumination patterns directly within an optical microscope.
• To demonstrate the device's capability for optical sectioning and multicolor SIM.

Main Methods:

• Utilized optical waveguides in a Mach-Zehnder interferometer configuration to create controlled coherent point sources.
• Optically conjugated the device to the microscope's pupil plane to generate sinusoidal illumination patterns.
• Employed amplitude modulation for optical sectioning and contrast control.

Main Results:

• Successfully generated translatable and modulatable sinusoidal illumination patterns.
• Demonstrated optical sectioning in High and Low Frequency Illumination (HiLo) microscopy.
• Achieved controlled structured illumination contrast across multiple wavelengths for multicolor SIM.

Conclusions:

• Integrated photonics provides a compact and robust solution for advanced microscopy.
• The developed device simplifies the implementation of high-resolution structured illumination imaging.
• This technology has potential applications in biomedical and materials science.