Massively parallel electro-optic sampling of space-encoded optical pulses for ultrafast multi-dimensional imaging

Area of Science:

• Optics and Photonics
• Micro- and Nanotechnology
• Mechanical Engineering

Background:

• High-speed, high-resolution surface imaging is crucial for micro/nano-devices.
• Capturing complex, nonlinear mechanical dynamics in real-time remains a challenge.
• Existing methods lack the necessary speed and resolution for dynamic behaviors.

Purpose of the Study:

• To develop a real-time imaging system for fast and complex mechanical dynamics.
• To achieve high axial and lateral resolutions for surface deformation imaging.
• To enable direct time-domain imaging of displacements and motions.

Main Methods:

• Utilized electro-optic sampling with a frequency comb.
• Developed a line-scan time-of-flight (TOF) camera.
• Achieved simultaneous measurement of TOF changes across multiple spatial coordinates.

Main Results:

• Demonstrated a camera with hundreds of megapixels/s pixel-rate.
• Achieved sub-nanometre axial resolution over a millimetre field-of-view.
• Enabled simultaneous measurement of TOF changes for over 1000 spatial coordinates.

Conclusions:

• The developed TOF camera offers a unique combination of speed and resolution.
• It facilitates fast and precise imaging of 3D device structures and dynamics.
• This technology addresses the need for real-time imaging of complex mechanical behaviors.