Thin head atomic force microscope for integration with optical microscope.

Area of Science:

• Materials Science
• Nanotechnology
• Microscopy

Background:

• Atomic Force Microscopy (AFM) offers high resolution but often requires dedicated setups.
• Integrating AFM with Optical Microscopes (OM) can combine complementary imaging modalities.
• Existing AFM systems can be bulky, limiting their compatibility with standard OM configurations.

Purpose of the Study:

• To develop a novel, thin-head AFM for seamless integration with upright optical microscopes.
• To reduce the physical constraints of AFM heads for improved compatibility with OM objectives.
• To demonstrate the combined capabilities of AFM and OM for advanced imaging applications.

Main Methods:

• Designed an AFM with an obliquely incident laser detection system, reducing head thickness to 7.3 mm.
• Developed a multi-function digital controller with interfaces for OM communication.
• Evaluated AFM performance using noise level, bandwidth measurements, and imaging of calibration grids and 2D materials.
• Integrated the thin-head AFM with a white light interferometer to showcase combined system functionality.

Main Results:

• The thin-head AFM achieved a reduced effective thickness, allowing clearance for high numerical aperture (N.A.) OM objective lenses.
• Noise levels and bandwidths were characterized, confirming system stability.
• High-resolution imaging of calibration grids and 2D materials demonstrated the AFM's capability.
• Successful integration with an optical microscope and a white light interferometer was achieved.

Conclusions:

• The developed thin-head AFM is compatible with upright optical microscopes.
• This integration enhances OM systems by adding AFM's high-resolution nanoscale imaging capabilities.
• The novel design facilitates combined multi-modal microscopy for advanced research.