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A Multimodal Wide-Field Fourier-Transform Raman Microscope
Published on: December 30, 2025
Real-time terahertz near-field microscope.
1Institute for Integrated Cell-Material Sciences, Kyoto University, Sakyo-ku, Kyoto, Japan. blanchard@icems.kyoto-u.ac.jp
Optics Express
|June 7, 2011
Summary
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.
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.
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