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A Multimodal Wide-Field Fourier-Transform Raman Microscope

A Multimodal Wide-Field Fourier-Transform Raman Microscope

Published on: December 30, 2025

Real-time terahertz near-field microscope.

F Blanchard¹, A Doi, T Tanaka

¹Institute for Integrated Cell-Material Sciences, Kyoto University, Sakyo-ku, Kyoto, Japan. blanchard@icems.kyoto-u.ac.jp

|June 7, 2011

Summary

This summary is machine-generated.

We developed a high-dynamic-range terahertz near-field microscope. This advanced microscope achieves high spatial resolution over a large area, enabling detailed imaging of terahertz field enhancements.

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Area of Science:

Optics and Photonics
Terahertz Science and Technology

Background:

Terahertz (THz) near-field microscopy offers high-resolution imaging capabilities.
Achieving high spatial resolution over large areas at high speeds remains a challenge.

Purpose of the Study:

To report a novel terahertz near-field microscope with high dynamic range and high spatial resolution over a large area.
To demonstrate the microscope's capability in revealing localized field enhancements.

Main Methods:

Utilized terahertz generation via tilted-pulse-front excitation.
Employed electro-optic balanced imaging detection with a thin crystal.
Achieved a spatial resolution of 14 μm (λ/30 at 0.7 THz) over a 370 x 740 μm2 area at 35 frames per second.

Main Results:

Successfully captured terahertz near-field images with high dynamic range.
Demonstrated high spatial resolution (14 μm) on a large imaging area.
Revealed significant field enhancement at the gap of a dipole antenna upon terahertz pulse irradiation.

Conclusions:

The developed terahertz near-field microscope enables high-resolution, large-area imaging at high speeds.
The technique is capable of visualizing localized electromagnetic field phenomena, such as antenna gap enhancement.
This advancement opens new possibilities for studying nanoscale terahertz interactions.